Benazepril: Difference between revisions
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<font color="#F8F8FF" style="font-weight: bold;">When pregnancy is detected, discontinue benazepril hydrochloride as soon as possible. | * <font color="#F8F8FF" style="font-weight: bold;">When pregnancy is detected, discontinue benazepril hydrochloride as soon as possible. | ||
Drugs that act directly on the renin-angiotensin system can cause injury and death to the developing fetus. </font> | * Drugs that act directly on the renin-angiotensin system can cause injury and death to the developing fetus. </font> | ||
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==Drug Interactions== | ==Drug Interactions== | ||
'''Diuretics''' | |||
:* Patients on [[diuretic]]s, especially those in whom [[diuretic]] therapy was recently instituted, may occasionally experience an excessive reduction of [[blood pressure]] after initiation of therapy with Benazepril. The possibility of [[hypotensive]] effects with Benazepril can be minimized by either discontinuing the [[diuretic]] or increasing the salt intake prior to initiation of treatment with Benazepril. If this is not possible, the starting dose should be reduced. | :* Patients on [[diuretic]]s, especially those in whom [[diuretic]] therapy was recently instituted, may occasionally experience an excessive reduction of [[blood pressure]] after initiation of therapy with Benazepril. The possibility of [[hypotensive]] effects with Benazepril can be minimized by either discontinuing the [[diuretic]] or increasing the salt intake prior to initiation of treatment with Benazepril. If this is not possible, the starting dose should be reduced. | ||
'''Potassium supplements and potassium-sparing diuretics''' | |||
:* Concomitant use with Benazepril may effect [[potassium]] levels. Monitor [[potassium]] periodically. | :* Concomitant use with Benazepril may effect [[potassium]] levels. Monitor [[potassium]] periodically. | ||
'''Oral anticoagulants''' | |||
:* Interaction studies with [[warfarin]] and [[acenocoumarol]] failed to identify any clinically important effects on the serum concentrations or clinical effects of these [[anticoagulant]]s. | :* Interaction studies with [[warfarin]] and [[acenocoumarol]] failed to identify any clinically important effects on the serum concentrations or clinical effects of these [[anticoagulant]]s. | ||
'''Lithium''' | |||
:* Increased serum [[lithium]] levels and symptoms of [[lithium toxicity]] have been reported in patients receiving [[ACEI|ACE inhibitors]] (including Benazepril) during therapy with [[lithium]]. Monitor [[lithium]] levels when used concomitantly with Benazepril. | :* Increased serum [[lithium]] levels and symptoms of [[lithium toxicity]] have been reported in patients receiving [[ACEI|ACE inhibitors]] (including Benazepril) during therapy with [[lithium]]. Monitor [[lithium]] levels when used concomitantly with Benazepril. | ||
'''Gold''' | |||
:* Nitritoid reactions (symptoms include facial [[flushing]], [[nausea]], [[vomiting]] and [[hypotension]]) have been reported rarely in patients on therapy with injectable gold (sodium aurothiomalate) and concomitant [[ACE inhibitor]] therapy. | :* Nitritoid reactions (symptoms include facial [[flushing]], [[nausea]], [[vomiting]] and [[hypotension]]) have been reported rarely in patients on therapy with injectable gold (sodium aurothiomalate) and concomitant [[ACE inhibitor]] therapy. | ||
'''Anti-diabetics''' | |||
:* In rare cases, [[diabetic]] patients receiving an [[ACE inhibitor]] (including Benazepril) concomitantly with [[insulin]] or oral anti-diabetics may develop [[hypoglycemia]]. Such patients should therefore be advised about the possibility of hypoglycemic reactions and should be monitored accordingly. | :* In rare cases, [[diabetic]] patients receiving an [[ACE inhibitor]] (including Benazepril) concomitantly with [[insulin]] or oral anti-diabetics may develop [[hypoglycemia]]. Such patients should therefore be advised about the possibility of hypoglycemic reactions and should be monitored accordingly. | ||
'''NSAID|Non-steroidal anti-inflammatory drugs (NSAIDs) including selective COX-2 inhibitor|cyclooxygenase-2 inhibitors (COX-2 inhibitors)''' | |||
:* In patients who are elderly, [[hypovolemia|volume-depleted]] (including those on [[diuretic]] therapy), or with [[renal insufficiency|compromised renal function]], co-administration of [[NSAID]]s, including selective [[COX-2 inhibitor]]s, with [[ACE inhibitor]]s, including Benazepril, may result in deterioration of [[renal function]], including possible [[acute renal failure]]. These effects are usually reversible. Monitor [[renal function]] periodically in patients receiving Benazepril and [[NSAID]] therapy. | :* In patients who are elderly, [[hypovolemia|volume-depleted]] (including those on [[diuretic]] therapy), or with [[renal insufficiency|compromised renal function]], co-administration of [[NSAID]]s, including selective [[COX-2 inhibitor]]s, with [[ACE inhibitor]]s, including Benazepril, may result in deterioration of [[renal function]], including possible [[acute renal failure]]. These effects are usually reversible. Monitor [[renal function]] periodically in patients receiving Benazepril and [[NSAID]] therapy. | ||
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:* The [[antihypertensive]] effect of [[ACE inhibitor]]s, including Benazepril, may be attenuated by [[NSAID]]s. | :* The [[antihypertensive]] effect of [[ACE inhibitor]]s, including Benazepril, may be attenuated by [[NSAID]]s. | ||
'''Miscellaneous''' | |||
:* Benazepril has been used concomitantly with [[beta blocker|beta-adrenergic-blocking agents]], [[CCB|calcium-channel-blocking agents]], [[diuretic]]s, [[digoxin]], and [[hydralazine]], without evidence of clinically important adverse interactions. Benazepril, like other [[ACE inhibitor]]s, has had less than additive effects with [[beta blocker|beta-adrenergic blockers]], presumably because both drugs lower [[blood pressure]] by inhibiting parts of the [[renin-angiotensin system]]. | :* Benazepril has been used concomitantly with [[beta blocker|beta-adrenergic-blocking agents]], [[CCB|calcium-channel-blocking agents]], [[diuretic]]s, [[digoxin]], and [[hydralazine]], without evidence of clinically important adverse interactions. Benazepril, like other [[ACE inhibitor]]s, has had less than additive effects with [[beta blocker|beta-adrenergic blockers]], presumably because both drugs lower [[blood pressure]] by inhibiting parts of the [[renin-angiotensin system]]. | ||
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====Renal Impairment==== | ====Renal Impairment==== | ||
* As a consequence of inhibiting the [[renin-angiotensin-aldosterone system]], changes in [[renal function]] may be anticipated in susceptible individuals. In patients with severe [[congestive heart failure]] whose [[renal function]] may depend on the activity of the [[renin-angiotensin-aldosterone system]], treatment with [[ACEI|angiotensin-converting enzyme inhibitors]], including Benazepril, may be associated with [[oliguria]] and/or progressive [[azotemia]] and (rarely) with [[acute renal failure]] and/or death. In a small study of [[hypertensive]] patients with [[renal artery stenosis]] in a solitary kidney or bilateral [[renal artery stenosis]], treatment with Benazepril was associated with increases in [[BUN|blood urea nitrogen]] and serum [[creatinine]]; these increases were reversible upon discontinuation of Benazepril or [[diuretic]] therapy, or both. When such patients are treated with [[ACE inhibitor]]s, [[renal function]] should be monitored during the first few weeks of therapy. Some [[hypertensive]] patients with no apparent preexisting renal vascular disease have developed increases in [[BUN|blood urea nitrogen]] and serum [[creatinine]], usually minor and transient, especially when Benazepril has been given concomitantly with a [[diuretic]]. This is more likely to occur in patients with preexisting [[renal impairment]]. Dosage reduction of Benazepril and/or discontinuation of the [[diuretic]] may be required. Evaluation of the [[hypertensive]] patient should always include assessment of [[renal function]] | * As a consequence of inhibiting the [[renin-angiotensin-aldosterone system]], changes in [[renal function]] may be anticipated in susceptible individuals. In patients with severe [[congestive heart failure]] whose [[renal function]] may depend on the activity of the [[renin-angiotensin-aldosterone system]], treatment with [[ACEI|angiotensin-converting enzyme inhibitors]], including Benazepril, may be associated with [[oliguria]] and/or progressive [[azotemia]] and (rarely) with [[acute renal failure]] and/or death. In a small study of [[hypertensive]] patients with [[renal artery stenosis]] in a solitary kidney or bilateral [[renal artery stenosis]], treatment with Benazepril was associated with increases in [[BUN|blood urea nitrogen]] and serum [[creatinine]]; these increases were reversible upon discontinuation of Benazepril or [[diuretic]] therapy, or both. When such patients are treated with [[ACE inhibitor]]s, [[renal function]] should be monitored during the first few weeks of therapy. Some [[hypertensive]] patients with no apparent preexisting renal vascular disease have developed increases in [[BUN|blood urea nitrogen]] and serum [[creatinine]], usually minor and transient, especially when Benazepril has been given concomitantly with a [[diuretic]]. This is more likely to occur in patients with preexisting [[renal impairment]]. Dosage reduction of Benazepril and/or discontinuation of the [[diuretic]] may be required. Evaluation of the [[hypertensive]] patient should always include assessment of [[renal function]]. | ||
====Hepatic Impairment==== | ====Hepatic Impairment==== | ||
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====Miscellaneous==== | ====Miscellaneous==== | ||
'''Hyperkalemia''' | |||
:* In clinical trials, [[hyperkalemia]] (serum [[potassium]] at least 0.5 mEq/L greater than the upper limit of normal) occurred in approximately 1% of [[hypertensive]] patients receiving Benazepril. In most cases, these were isolated values which resolved despite continued therapy. Risk factors for the development of [[hyperkalemia]] include [[renal insufficiency]], [[diabetes mellitus]], and the concomitant use of [[potassium-sparing diuretic]]s, [[potassium]] supplements, and/or [[potassium]]-containing salt substitutes, which should be used cautiously, if at all, with Benazepril | :* In clinical trials, [[hyperkalemia]] (serum [[potassium]] at least 0.5 mEq/L greater than the upper limit of normal) occurred in approximately 1% of [[hypertensive]] patients receiving Benazepril. In most cases, these were isolated values which resolved despite continued therapy. Risk factors for the development of [[hyperkalemia]] include [[renal insufficiency]], [[diabetes mellitus]], and the concomitant use of [[potassium-sparing diuretic]]s, [[potassium]] supplements, and/or [[potassium]]-containing salt substitutes, which should be used cautiously, if at all, with Benazepril. | ||
'''Cough''' | |||
:* Presumably due to the inhibition of the degradation of endogenous [[bradykinin]], persistent nonproductive [[cough]] has been reported with all [[ACE inhibitor]]s, always resolving after discontinuation of therapy. [[ACE inhibitor]]-induced [[cough]] should be considered in the differential diagnosis of [[cough]]. | :* Presumably due to the inhibition of the degradation of endogenous [[bradykinin]], persistent nonproductive [[cough]] has been reported with all [[ACE inhibitor]]s, always resolving after discontinuation of therapy. [[ACE inhibitor]]-induced [[cough]] should be considered in the differential diagnosis of [[cough]]. | ||
'''Surgery/Anesthesia''' | |||
:* In patients undergoing [[surgery]] or during [[anesthesia]] with agents that produce [[hypotension]], Benazepril will block the [[angiotensin II]] formation that could otherwise occur secondary to compensatory [[renin]] release. [[Hypotension]] that occurs as a result of this mechanism can be corrected by volume expansion. | :* In patients undergoing [[surgery]] or during [[anesthesia]] with agents that produce [[hypotension]], Benazepril will block the [[angiotensin II]] formation that could otherwise occur secondary to compensatory [[renin]] release. [[Hypotension]] that occurs as a result of this mechanism can be corrected by volume expansion. | ||
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====Monitoring==== | ====Monitoring==== | ||
'''Geriatric Use''' | |||
:* Benazepril and benazeprilat are substantially excreted by the kidney. Because elderly patients are more likely to have [[renal insufficiency|decreased renal function]], care should be taken in dose selection, and it may be useful to monitor [[renal function]]. | :* Benazepril and benazeprilat are substantially excreted by the kidney. Because elderly patients are more likely to have [[renal insufficiency|decreased renal function]], care should be taken in dose selection, and it may be useful to monitor [[renal function]]. | ||
'''Overdose''' | |||
:* Patients should be closely monitored for [[blood pressure]] and clinical symptoms. Supportive management should be employed to ensure adequate [[hydration]] and to maintain systemic [[blood pressure]]. | :* Patients should be closely monitored for [[blood pressure]] and clinical symptoms. Supportive management should be employed to ensure adequate [[hydration]] and to maintain systemic [[blood pressure]]. | ||
'''Renal Artery Stenosis''' | |||
:* When hypertensive patients with [[renal artery stenosis]] in a solitary kidney or bilateral [[renal artery stenosis]] patients are treated with [[ACE inhibitor]]s, [[renal function]] should be monitored during the first few weeks of therapy. | :* When hypertensive patients with [[renal artery stenosis]] in a solitary kidney or bilateral [[renal artery stenosis]] patients are treated with [[ACE inhibitor]]s, [[renal function]] should be monitored during the first few weeks of therapy. | ||
'''Use of Potassium Supplements and Potassium-Sparing Diuretics''' | |||
:* Concomitant [[potassium]] supplements and [[potassium-sparing diuretic]]s use with Benazepril may effect [[potassium]] levels. Monitor [[potassium]] periodically. | :* Concomitant [[potassium]] supplements and [[potassium-sparing diuretic]]s use with Benazepril may effect [[potassium]] levels. Monitor [[potassium]] periodically. | ||
'''Use of Lithium''' | |||
:* Increased serum [[lithium]] levels and symptoms of [[lithium toxicity]] have been reported in patients receiving [[ACE inhibitor]]s (including Benazepril) during therapy with [[lithium]]. Monitor [[lithium]] levels when used concomitantly with Benazepril. | :* Increased serum [[lithium]] levels and symptoms of [[lithium toxicity]] have been reported in patients receiving [[ACE inhibitor]]s (including Benazepril) during therapy with [[lithium]]. Monitor [[lithium]] levels when used concomitantly with Benazepril. | ||
'''Use of Anti-Diabetics''' | |||
:* In rare cases, [[diabetic]] patients receiving an [[ACE inhibitor]] (including Benazepril) concomitantly with [[insulin]] or oral anti-diabetics may develop [[hypoglycemia]]. Such patients should therefore be advised about the possibility of [[hypoglycemic]] reactions and should be monitored accordingly. | :* In rare cases, [[diabetic]] patients receiving an [[ACE inhibitor]] (including Benazepril) concomitantly with [[insulin]] or oral anti-diabetics may develop [[hypoglycemia]]. Such patients should therefore be advised about the possibility of [[hypoglycemic]] reactions and should be monitored accordingly. | ||
'''Use of Non-Steroidal Anti-Inflammatory Drugs (NSAIDs) Including Selective Cyclooxygenase-2 Inhibitors (COX-2 Inhibitors)''' | |||
:* In patients who are elderly, volume-depleted (including those on [[diuretic]] therapy), or with [[renal insufficiency|compromised renal function]], co-administration of [[NSAID]]s, including selective [[COX-2 inhibitor]]s, with [[ACE inhibitor]]s, including benazepril, may result in deterioration of [[renal function]], including possible [[acute renal failure]]. These effects are usually reversible. Monitor [[renal function]] periodically in patients receiving Benazepril and [[NSAID]] therapy. | :* In patients who are elderly, volume-depleted (including those on [[diuretic]] therapy), or with [[renal insufficiency|compromised renal function]], co-administration of [[NSAID]]s, including selective [[COX-2 inhibitor]]s, with [[ACE inhibitor]]s, including benazepril, may result in deterioration of [[renal function]], including possible [[acute renal failure]]. These effects are usually reversible. Monitor [[renal function]] periodically in patients receiving Benazepril and [[NSAID]] therapy. | ||
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====Signs and Symptoms==== | ====Signs and Symptoms==== | ||
FDA Package Insert for {{PAGENAME}} contains no information regarding ''Signs and Symptoms'' in ''Chronic Overdose''. | * FDA Package Insert for {{PAGENAME}} contains no information regarding ''Signs and Symptoms'' in ''Chronic Overdose''. | ||
====Management==== | ====Management==== | ||
FDA Package Insert for {{PAGENAME}} contains no information regarding ''Management'' in ''Chronic Overdose''. | * FDA Package Insert for {{PAGENAME}} contains no information regarding ''Management'' in ''Chronic Overdose''. | ||
==Pharmacology== | ==Pharmacology== |
Latest revision as of 17:58, 18 August 2015
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Amr Marawan, M.D. [2], Ahmed Zaghw, M.D. [3], Abdurahman Khalil, M.D. [4], Sheng Shi, M.D. [5], Jesus Rosario Hernandez, M.D. [6]
Synonyms / Brand Names: Lotensin®
Disclaimer
WikiDoc Drug Project is a constellation of drug information for healthcare providers and patients vigorously vetted on the basis of FDA package insert, MedlinePlus, Practice Guidelines, Scientific Statements, and scholarly medical literature. The information provided is not a medical advice or treatment. WikiDoc does not promote any medication or off-label use of drugs. Please read our full disclaimer here.
Black Box Warning
FETAL TOXICITY See full prescribing information for complete boxed warning.
|
Overview
Benazepril is an angiotensin converting enzyme inhibitor drug that is FDA approved for the treatment of hypertension. There is a Black Box Warning for this drug as shown here. Common adverse reactions include cough, dizziness, fatigue, and headache.
Adult Indications and Dosage
FDA-Labeled Indications and Dosage (Adult)
Hypertension
- Dosing Information
- Initial dose (not receiving a diuretic): Benazepril 10 mg PO qd
- Initial dose (concurrent diuretic use): the diuretic should be discontinued 2 to 3 days prior to initiating Benazepril to reduce the likelihood of hypotension. If blood pressure is not controlled with Benazepril alone, diuretic should be resumed and Benazepril 5 mg PO qd should be used.
- Maintenance dose:Benazepril 20—40 mg PO qd or Benazepril 10—20 mg PO bid (MAX 80 mg/day)
- The divided regimen was more effective in controlling trough (pre-dosing) blood pressure than the same dose given as a once-daily regimen. Dosage adjustment should be based on measurement of peak (2-6 hours after dosing) and trough responses. If a once-daily regimen does not give adequate trough response, an increase in dosage or divided administration should be considered.
- If blood pressure is not controlled with Benazepril alone, a diuretic can be added.
- Concomitant administration of Benazepril with potassium supplements, potassium salt substitutes, or potassium-sparing diuretics can lead to increases of serum potassium.
For Hypertensive Patients with Renal Impairment
- Dosing Information
- Initial dose (for creatinine clearance <30 mL/min/1.73 m2 or Cr >3 mg/dL):Benazepril 5 mg PO qd
- Dosage may be titrated upward until blood pressure is controlled or to a maximum total daily dose of 40 mg gs.[1]
Off-Label Use and Dosage (Adult)
Guideline-Supported Use
Heart Failure, Stage B
- Developed by: American College of Cardiology (ACC) and American Heart Association (AHA)
- Class of Recommendation: Class I
- Level of Evidence: Level A
- Recommendation
Myocardial Infarction
- Developed by: American College of Cardiology (ACC) and American Heart Association (AHA)
- Class of Recommendation: Class I
- Level of Evidence: Level A
- Recommendation
- An angiotensin-converting enzyme (ACE) inhibitor should be administered within the first 24 hours to all patients with STEMI with anterior location, HF, or ejection fraction (EF) less than or equal to 0.40, unless contraindicated.[3]
Non–Guideline-Supported Use
Diabetic Nephropathy
- Dosing Information
Kidney Disease, Non-Diabetic
- Dosing Information
Left Ventricular Hypertrophy
- Dosing Information
- Benazepril 20 mg PO qd for 2 weeks, followed by Benazepril 40 mg qd or combination of Benazepril 40 mg PO qd and amlodipine 5 mg PO qd[6]
Pediatric Indications and Dosage
FDA-Labeled Indications and Dosage (Pediatric)
Hypertension
- Dosing Information
- Initial dose: Benazepril 0.2 mg/kg PO qd (for pediatric patients above the age of 6 years)
- Benazepril is not advised for children below the age of 6 years and in pediatric patients with glomerular filtration rate <30 mL.
- For pediatric patients who cannot swallow tablets, or for whom the calculated dosage (mg/kg) does not correspond to the available tablet strengths for Benazepril, follow the suspension preparation instructions to administer Benazepril HCl as a suspension.
Hypertensive Patients with Renal Impairment
- Dosing Information
- Initial dose (for creatinine clearance <30 mL/min/1.73 m2 or Cr >3 mg/dL): Benazepril 5 mg PO qd
- Dosage may be titrated upward until blood pressure is controlled or to a maximum total daily dose of 40 mg.
Off-Label Use and Dosage (Pediatric)
There is limited information about Off-Label Use and Dosage of Benazepril tablet in pediatric patients.
Contraindications
- Hypersensitivity to Benazepril or to any other ACE inhibitor
- History of angioedema with or without previous ACE inhibitor treatment
Warnings
Anaphylactoid and Possibly Related Reactions
- Presumably because angiotensin-converting enzyme inhibitors affect the metabolism of eicosanoids and polypeptides, including endogenous bradykinin, patients receiving ACE inhibitors (including Benazepril) may be subject to a variety of adverse reactions, some of them serious.
- Head and Neck Angioedema
- Angioedema of the face, extremities, lips, tongue, glottis, and larynx has been reported in patients treated with angiotensin-converting enzyme inhibitors. In U.S. clinical trials, symptoms consistent with angioedema were seen in none of the subjects who received placebo and in about 0.5% of the subjects who received Benazepril. Angioedema associated with laryngeal edema can be fatal. If laryngeal stridor or angioedema of the face, tongue, or glottis occurs, treatment with Benazepril should be discontinued and appropriate therapy instituted immediately. Where there is involvement of the tongue, glottis, or larynx, likely to cause airway obstruction, appropriate therapy, e.g., subcutaneous epinephrine injection 1:1000 (0.3 mL to 0.5 mL) should be promptly administered.
- Black patients receiving ACE inhibitors have been reported to have a higher incidence of angioedema compared to nonblacks.
- Intestinal Angioedema
- Intestinal angioedema has been reported in patients treated with ACE inhibitors. These patients presented with abdominal pain (with or without nausea or vomiting); in some cases there was no prior history of facial angioedema and C-1 esterase levels were normal. The angioedema was diagnosed by procedures including abdominal CT scan or ultrasound, or at surgery, and symptoms resolved after stopping the ACE inhibitor. Intestinal angioedema should be included in the differential diagnosis of patients on ACE inhibitors presenting with abdominal pain.
- Anaphylactoid Reactions During Desensitization
- Two patients undergoing desensitizing treatment with hymenoptera venom while receiving ACE inhibitors sustained life-threatening anaphylactoid reactions. In the same patients, these reactions were avoided when ACE inhibitors were temporarily withheld, but they reappeared upon inadvertent rechallenge.
- Anaphylactoid Reactions During Membrane Exposure
- Anaphylactoid reactions have been reported in patients dialyzed with high-flux membranes and treated concomitantly with an ACE inhibitor. Anaphylactoid reactions have also been reported in patients undergoing low-density lipoprotein apheresis with dextran sulfate absorption (a procedure dependent upon devices not approved in the United States).
Hypotension
- Benazepril can cause symptomatic hypotension. Like other ACE inhibitors, Benazepril has been only rarely associated with hypotension in uncomplicated hypertensive patients. Symptomatic hypotension is most likely to occur in patients who have been volume-and/or salt-depleted as a result of prolonged diuretic therapy, dietary salt restriction, dialysis, diarrhea, or vomiting. Volume-and/or salt-depletion should be corrected before initiating therapy with Benazepril.
- In patients with congestive heart failure, with or without associated renal insufficiency, ACE inhibitor therapy may cause excessive hypotension, which may be associated with oliguria or azotemia and, rarely, with acute renal failure and death. In such patients, Benazepril therapy should be started under close medical supervision; they should be followed closely for the first 2 weeks of treatment and whenever the dose of benazepril or diuretic is increased.
- If hypotension occurs, the patient should be placed in a supine position, and, if necessary, treated with intravenous infusion of physiological saline. Benazepril treatment usually can be continued following restoration of blood pressure and volume.
Fetal toxicity
- Use of drugs that act on the renin-angiotensin system during the second and third trimesters of pregnancy reduces fetal renal function and increases fetal and neonatal morbidity and death. Resulting oligohydramnios can be associated with fetal lung hypoplasia and skeletal deformations. Potential neonatal adverse effects include skull hypoplasia, anuria, hypotension, renal failure, and death. When pregnancy is detected, discontinue Benazepril as soon as possible. These adverse outcomes are usually associated with use of these drugs in the second and third trimester of pregnancy. Most epidemiologic studies examining fetal abnormalities after exposure to antihypertensive use in the first trimester have not distinguished drugs affecting the renin-angiotensin system from other antihypertensive agents. Appropriate management of maternal hypertension during pregnancy is important to optimize outcomes for both mother and fetus.
- In the unusual case that there is no appropriate alternative to therapy with drugs affecting the renin-angiotensin system for a particular patient, apprise the mother of the potential risk to the fetus. Perform serial ultrasound examinations to assess the intra-amniotic environment. If oligohydramnios is observed, discontinue Benazepril, unless it is considered lifesaving for the mother. Fetal testing may be appropriate, based on the week of pregnancy. Patients and physicians should be aware, however, that oligohydramnios may not appear until after the fetus has sustained irreversible injury. Closely observe infants with histories of in utero exposure to Benazepril for hypotension, oliguria, and hyperkalemia.
- No teratogenic effects of Benazepril were seen in studies of pregnant rats, mice, and rabbits. On a mg/m2 basis, the doses used in these studies were 60 times (in rats), 9 times (in mice), and more than 0.8 times (in rabbits) the maximum recommended human dose (assuming a 50-kg woman). On a mg/kg basis these multiples are 300 times (in rats), 90 times (in mice), and more than 3 times (in rabbits) the maximum recommended human dose.
Hepatic Failure
- Rarely, ACE inhibitors have been associated with a syndrome that starts with cholestatic jaundice and progresses to fulminant hepatic necrosis and (sometimes) death. The mechanism of this syndrome is not understood. Patients receiving ACE inhibitors who develop jaundice or marked elevations of hepatic enzymes should discontinue the ACE inhibitor and receive appropriate medical follow-up.
Adverse Reactions
Clinical Trials Experience
- Benazepril has been evaluated for safety in over 6000 patients with hypertension; over 700 of these patients were treated for at least one year. The overall incidence of reported adverse events was comparable in Benazepril and placebo patients.
- The reported side effects were generally mild and transient, and there was no relation between side effects and age, duration of therapy, or total dosage within the range of 2 to 80 mg. Discontinuation of therapy because of a side effect was required in approximately 5% of U.S. patients treated with Benazepril and in 3% of patients treated with placebo.
- The side effects considered possibly or probably related to study drug that occurred in U.S. placebo-controlled trials in more than 1% of patients treated with Benazepril are shown below.
- Other adverse experiences reported in controlled clinical trials (in less than 1% of Benazepril patients or with less than 1% difference in incidence between Benazepril or placebo treatment), and rarer events seen in post-marketing experience, include the following (in some, a causal relationship to drug use is uncertain):
- Dermatologic
- Stevens-Johnson syndrome, pemphigus, apparent hypersensitivity reactions (manifested by dermatitis, pruritus, or rash), photosensitivity, and flushing.
- Gastrointestinal
- Nausea, pancreatitis, constipation, gastritis, vomiting, and melena.
- Hematologic
- Neurologic and Psychiatric
- Other
- Another potentially important adverse experience, eosinophilic pneumonitis, has been attributed to other ACE inhibitors.
- Clinical Laboratory Test Findings
- Hemoglobin
- Decreases in hemoglobin (a low value and a decrease of 5 g/dL) were rare, occurring in only 1 of 2,014 patients receiving Benazepril alone and in 1 of 1,357 patients receiving Benazepril plus a diuretic. No U.S. patients discontinued treatment because of decreases in hemoglobin.
- Other (causal relationships unknown)
- Elevations of uric acid, blood glucose, serum bilirubin, and liver enzymes have been reported, as have scattered incidents of hyponatremia, electrocardiographic changes, eosinophilia, and proteinuria.
- Pediatric Patients
- The adverse experience profile for pediatric patients appears to be similar to that seen in adult patients.
Postmarketing Experience
- FDA Package Insert for Benazepril contains no information regarding Postmarketing Experience.
Drug Interactions
Diuretics
- Patients on diuretics, especially those in whom diuretic therapy was recently instituted, may occasionally experience an excessive reduction of blood pressure after initiation of therapy with Benazepril. The possibility of hypotensive effects with Benazepril can be minimized by either discontinuing the diuretic or increasing the salt intake prior to initiation of treatment with Benazepril. If this is not possible, the starting dose should be reduced.
Potassium supplements and potassium-sparing diuretics
Oral anticoagulants
- Interaction studies with warfarin and acenocoumarol failed to identify any clinically important effects on the serum concentrations or clinical effects of these anticoagulants.
Lithium
- Increased serum lithium levels and symptoms of lithium toxicity have been reported in patients receiving ACE inhibitors (including Benazepril) during therapy with lithium. Monitor lithium levels when used concomitantly with Benazepril.
Gold
- Nitritoid reactions (symptoms include facial flushing, nausea, vomiting and hypotension) have been reported rarely in patients on therapy with injectable gold (sodium aurothiomalate) and concomitant ACE inhibitor therapy.
Anti-diabetics
- In rare cases, diabetic patients receiving an ACE inhibitor (including Benazepril) concomitantly with insulin or oral anti-diabetics may develop hypoglycemia. Such patients should therefore be advised about the possibility of hypoglycemic reactions and should be monitored accordingly.
NSAID|Non-steroidal anti-inflammatory drugs (NSAIDs) including selective COX-2 inhibitor|cyclooxygenase-2 inhibitors (COX-2 inhibitors)
- In patients who are elderly, volume-depleted (including those on diuretic therapy), or with compromised renal function, co-administration of NSAIDs, including selective COX-2 inhibitors, with ACE inhibitors, including Benazepril, may result in deterioration of renal function, including possible acute renal failure. These effects are usually reversible. Monitor renal function periodically in patients receiving Benazepril and NSAID therapy.
- The antihypertensive effect of ACE inhibitors, including Benazepril, may be attenuated by NSAIDs.
Miscellaneous
- Benazepril has been used concomitantly with beta-adrenergic-blocking agents, calcium-channel-blocking agents, diuretics, digoxin, and hydralazine, without evidence of clinically important adverse interactions. Benazepril, like other ACE inhibitors, has had less than additive effects with beta-adrenergic blockers, presumably because both drugs lower blood pressure by inhibiting parts of the renin-angiotensin system.
- The pharmacokinetics of Benazepril are not affected by the following drugs: hydrochlorothiazide, furosemide, chlorthalidone, digoxin, propranolol, atenolol, nifedipine, amlodipine, naproxen, acetylsalicylic acid, or cimetidine. Likewise the administration of Benazepril does not substantially affect the pharmacokinetics of these medications (cimetidine kinetics were not studied).
Use in Specific Populations
Pregnancy
Pregnancy Category (FDA): D
Pregnancy Category (AUS): Benazepril is not included in Australian Drug Evaluation Committee (ADEC) Pregnancy Categories.
- Fetal toxicity
- Use of drugs that act on the renin-angiotensin system during the second and third trimesters of pregnancy reduces fetal renal function and increases fetal and neonatal morbidity and death. Resulting oligohydramnios can be associated with fetal lung hypoplasia and skeletal deformations. Potential neonatal adverse effects include skull hypoplasia, anuria, hypotension, renal failure, and death. When pregnancy is detected, discontinue Benazepril as soon as possible. These adverse outcomes are usually associated with use of these drugs in the second and third trimester of pregnancy. Most epidemiologic studies examining fetal abnormalities after exposure to antihypertensive use in the first trimester have not distinguished drugs affecting the renin-angiotensin system from other antihypertensive agents. Appropriate management of maternal hypertension during pregnancy is important to optimize outcomes for both mother and fetus.
- In the unusual case that there is no appropriate alternative to therapy with drugs affecting the renin-angiotensin system for a particular patient, apprise the mother of the potential risk to the fetus. Perform serial ultrasound examinations to assess the intra-amniotic environment. If oligohydramnios is observed, discontinue Benazepril, unless it is considered lifesaving for the mother. Fetal testing may be appropriate, based on the week of pregnancy. Patients and physicians should be aware, however, that oligohydramnios may not appear until after the fetus has sustained irreversible injury. Closely observe infants with histories of in utero exposure to Benazepril for hypotension, oliguria, and hyperkalemia.
- No teratogenic effects of Benazepril were seen in studies of pregnant rats, mice, and rabbits. On a mg/m2 basis, the doses used in these studies were 60 times (in rats), 9 times (in mice), and more than 0.8 times (in rabbits) the maximum recommended human dose (assuming a 50-kg woman). On a mg/kg basis these multiples are 300 times (in rats), 90 times (in mice), and more than 3 times (in rabbits) the maximum recommended human dose.
Labor and Delivery
- FDA Package Insert for Benazepril contains no information regarding Labor and Delivery.
Nursing Mothers
- Minimal amounts of unchanged Benazepril and of benazeprilat are excreted into the breast milk of lactating women treated with Benazepril. A newborn child ingesting entirely breast milk would receive less than 0.1% of the mg/kg maternal dose of Benazepril and benazeprilat.
Pediatric Use
- Neonates with a history of in utero exposure to Benazepril
- If oliguria or hypotension occurs, direct attention toward support of blood pressure and renal perfusion. Exchange transfusions or dialysis may be required as a means of reversing hypotension and/or substituting for disordered renal function. Benazepril, which crosses the placenta, can theoretically be removed from the neonatal circulation by these means; there are occasional reports of benefit from these maneuvers with another ACE inhibitor, but experience is limited.
- The antihypertensive effects of Benazepril have been evaluated in a double-blind study in pediatric patients 7 to 16 years of age . The pharmacokinetics of Benazepril have been evaluated in pediatric patients 6 to 16 years of age . Benazepril was generally well tolerated and adverse effects were similar to those described in adults.The long-term effects of Benazepril on growth and development have not been studied. Infants below the age of 1 year should not be given Benazepril because of the risk of effects on kidney development.
- Treatment with Benazepril is not recommended in pediatric patients less than 6 years of age , and in children with glomerular filtration rate <30 mL/min as there are insufficient data available to support a dosing recommendation in these groups.
Geriatric Use
- Of the total number of patients who received Benazepril in U.S. clinical studies of Benazepril, 18% were 65 or older while 2% were 75 or older. No overall differences in effectiveness or safety were observed between these patients and younger patients, and other reported clinical experience has not identified differences in responses between the elderly and younger patients, but greater sensitivity of some older individuals cannot be ruled out.
- Benazepril and benazeprilat are substantially excreted by the kidney. Because elderly patients are more likely to have decreased renal function, care should be taken in dose selection, and it may be useful to monitor renal function.
Gender
FDA Package Insert for Benazepril contains no information regarding Gender.
Race
FDA Package Insert for Benazepril contains no information regarding Race.
Renal Impairment
- As a consequence of inhibiting the renin-angiotensin-aldosterone system, changes in renal function may be anticipated in susceptible individuals. In patients with severe congestive heart failure whose renal function may depend on the activity of the renin-angiotensin-aldosterone system, treatment with angiotensin-converting enzyme inhibitors, including Benazepril, may be associated with oliguria and/or progressive azotemia and (rarely) with acute renal failure and/or death. In a small study of hypertensive patients with renal artery stenosis in a solitary kidney or bilateral renal artery stenosis, treatment with Benazepril was associated with increases in blood urea nitrogen and serum creatinine; these increases were reversible upon discontinuation of Benazepril or diuretic therapy, or both. When such patients are treated with ACE inhibitors, renal function should be monitored during the first few weeks of therapy. Some hypertensive patients with no apparent preexisting renal vascular disease have developed increases in blood urea nitrogen and serum creatinine, usually minor and transient, especially when Benazepril has been given concomitantly with a diuretic. This is more likely to occur in patients with preexisting renal impairment. Dosage reduction of Benazepril and/or discontinuation of the diuretic may be required. Evaluation of the hypertensive patient should always include assessment of renal function.
Hepatic Impairment
- Rarely, ACE inhibitors have been associated with a syndrome that starts with cholestatic jaundice and progresses to fulminant hepatic necrosis and (sometimes) death. The mechanism of this syndrome is not understood. Patients receiving ACE inhibitors who develop jaundice or marked elevations of hepatic enzymes should discontinue the ACE inhibitor and receive appropriate medical follow-up.
Carcinogenesis, Mutagenesis, Impairment of Fertility
- No evidence of carcinogenicity was found when Benazepril was administered to rats and mice for up to two years at doses of up to 150 mg/kg/day. When compared on the basis of body weights, this dose is 110 times the maximum recommended human dose. When compared on the basis of body surface areas, this dose is 18 and 9 times (rats and mice, respectively) the maximum recommended human dose (calculations assume a patient weight of 60 kg).
- No mutagenic activity was detected in the Ames test in bacteria (with or without metabolic activation), in an in vitro test for forward mutations in cultured mammalian cells, or in a nucleus anomaly test.
- In doses of 50-500 mg/kg/day (6-60 times the maximum recommended human dose based on mg/m2 comparison and 37-375 times the maximum recommended human dose based on a mg/kg comparison), Benazepril had no adverse effect on the reproductive performance of male and female rats.
Immunocompromised Patients
FDA Package Insert for Benazepril contains no information regarding Immunocompromised Patients.
Miscellaneous
Hyperkalemia
- In clinical trials, hyperkalemia (serum potassium at least 0.5 mEq/L greater than the upper limit of normal) occurred in approximately 1% of hypertensive patients receiving Benazepril. In most cases, these were isolated values which resolved despite continued therapy. Risk factors for the development of hyperkalemia include renal insufficiency, diabetes mellitus, and the concomitant use of potassium-sparing diuretics, potassium supplements, and/or potassium-containing salt substitutes, which should be used cautiously, if at all, with Benazepril.
Cough
- Presumably due to the inhibition of the degradation of endogenous bradykinin, persistent nonproductive cough has been reported with all ACE inhibitors, always resolving after discontinuation of therapy. ACE inhibitor-induced cough should be considered in the differential diagnosis of cough.
Surgery/Anesthesia
- In patients undergoing surgery or during anesthesia with agents that produce hypotension, Benazepril will block the angiotensin II formation that could otherwise occur secondary to compensatory renin release. Hypotension that occurs as a result of this mechanism can be corrected by volume expansion.
Administration and Monitoring
Administration
- Oral
- Preparation of suspension (for 150 mL of a 2 mg/mL suspension)
- Add 75 mL of Ora-Plus® oral suspending vehicle to an amber polyethylene terephthalate (PET) bottle containing fifteen Benazepril 20 mg tablets, and shake for at least 2 minutes. Allow the suspension to stand for a minimum of 1 hour. After the standing time, shake the suspension for a minimum of 1 additional minute. Add 75 mL of Ora-Sweet® oral syrup vehicle to the bottle and shake the suspension to disperse the ingredients. The suspension should be refrigerated at 2-8°C (36-46°F) and can be stored for up to 30 days in the PET bottle with a child-resistant screw-cap closure. Shake the suspension before each use.
Monitoring
Geriatric Use
- Benazepril and benazeprilat are substantially excreted by the kidney. Because elderly patients are more likely to have decreased renal function, care should be taken in dose selection, and it may be useful to monitor renal function.
Overdose
- Patients should be closely monitored for blood pressure and clinical symptoms. Supportive management should be employed to ensure adequate hydration and to maintain systemic blood pressure.
Renal Artery Stenosis
- When hypertensive patients with renal artery stenosis in a solitary kidney or bilateral renal artery stenosis patients are treated with ACE inhibitors, renal function should be monitored during the first few weeks of therapy.
Use of Potassium Supplements and Potassium-Sparing Diuretics
- Concomitant potassium supplements and potassium-sparing diuretics use with Benazepril may effect potassium levels. Monitor potassium periodically.
Use of Lithium
- Increased serum lithium levels and symptoms of lithium toxicity have been reported in patients receiving ACE inhibitors (including Benazepril) during therapy with lithium. Monitor lithium levels when used concomitantly with Benazepril.
Use of Anti-Diabetics
- In rare cases, diabetic patients receiving an ACE inhibitor (including Benazepril) concomitantly with insulin or oral anti-diabetics may develop hypoglycemia. Such patients should therefore be advised about the possibility of hypoglycemic reactions and should be monitored accordingly.
Use of Non-Steroidal Anti-Inflammatory Drugs (NSAIDs) Including Selective Cyclooxygenase-2 Inhibitors (COX-2 Inhibitors)
- In patients who are elderly, volume-depleted (including those on diuretic therapy), or with compromised renal function, co-administration of NSAIDs, including selective COX-2 inhibitors, with ACE inhibitors, including benazepril, may result in deterioration of renal function, including possible acute renal failure. These effects are usually reversible. Monitor renal function periodically in patients receiving Benazepril and NSAID therapy.
IV Compatibility
FDA Package Insert for Benazepril contains no information regarding IV Compatibility.
Overdosage
Acute Overdose
Signs and Symptoms
- Human overdoses of Benazepril have not been reported, but the most common manifestation of human Benazepril overdosage is likely to be hypotension, which can be associated with electrolyte disturbances and renal failure.
Management
- Laboratory determinations of serum levels of Benazepril and its metabolites are not widely available, and such determinations have, in any event, no established role in the management of Benazepril overdose.
- No data are available to suggest physiological maneuvers (e.g., maneuvers to change the pH of the urine) that might accelerate elimination of Benazepril and its metabolites. Benazepril is only slightly dialyzable, but dialysis might be considered in overdosed patients with severely impaired renal function (see Warnings).
- Angiotensin II could presumably serve as a specific antagonist-antidote in the setting of Benazepril overdose, but angiotensin II is essentially unavailable outside of scattered research facilities. Because the hypotensive effect of Benazepril is achieved through vasodilation and effective hypovolemia, it is reasonable to treat Benazepril overdose by infusion of normal saline solution.
- If ingestion is recent, activated charcoal should be considered. Gastric decontamination (e.g., vomiting, gastric lavage) may be considered in individual cases, in the early period after ingestion.
- Patients should be closely monitored for blood pressure and clinical symptoms. Supportive management should be employed to ensure adequate hydration and to maintain systemic blood pressure.
- In the case of marked hypotension, physiological saline solution should be administered intravenously; depending on the clinical situation the use of vasopressors (e.g., catecholamines i.v.) may be considered.
Chronic Overdose
Signs and Symptoms
- FDA Package Insert for Benazepril contains no information regarding Signs and Symptoms in Chronic Overdose.
Management
- FDA Package Insert for Benazepril contains no information regarding Management in Chronic Overdose.
Pharmacology
Mechanism of Action
- Benazepril and benazeprilat inhibit angiotensin-converting enzyme (ACE) in human subjects and animals. ACE is a peptidyl dipeptidase that catalyzes the conversion of angiotensin I to the vasoconstrictor substance, angiotensin II. Angiotensin II also stimulates aldosterone secretion by the adrenal cortex.
- Inhibition of ACE results in decreased plasma angiotensin II, which leads to decreased vasopressor activity and to decreased aldosterone secretion. The latter decrease may result in a small increase of serum potassium. Hypertensive patients treated with Benazepril alone for up to 52 weeks had elevations of serum potassium of up to 0.2 mEq/L. Similar patients treated with Benazepril and hydrochlorothiazide for up to 24 weeks had no consistent changes in their serum potassium.
- Removal of angiotensin II negative feedback on renin secretion leads to increased plasma renin activity. In animal studies, benazepril had no inhibitory effect on the vasopressor response to angiotensin II and did not interfere with the hemodynamic effects of the autonomic neurotransmitters acetylcholine, epinephrine, and norepinephrine.
- ACE is identical to kininase, an enzyme that degrades bradykinin. Whether increased levels of bradykinin, a potent vasodepressor peptide, play a role in the therapeutic effects of Benazepril remains to be elucidated.
- While the mechanism through which Benazepril lowers blood pressure is believed to be primarily suppression of the renin-angiotensin-aldosterone system, Benazepril has an antihypertensive effect even in patients with low-renin hypertension.
Structure
Benazepril
| |
Systematic (IUPAC) name | |
2-[(3S)-3-{[(2S)-1-ethoxy-1-oxo-4-phenylbutan-2-yl]amino}- | |
Identifiers | |
CAS number | |
ATC code | C09 |
PubChem | |
DrugBank | |
Chemical data | |
Formula | Template:OrganicBox atomTemplate:OrganicBox atomTemplate:OrganicBoxTemplate:OrganicBoxTemplate:OrganicBoxTemplate:OrganicBoxTemplate:OrganicBoxTemplate:OrganicBoxTemplate:OrganicBoxTemplate:OrganicBoxTemplate:OrganicBoxTemplate:OrganicBoxTemplate:OrganicBoxTemplate:OrganicBox atomTemplate:OrganicBoxTemplate:OrganicBox atomTemplate:OrganicBoxTemplate:OrganicBoxTemplate:OrganicBoxTemplate:OrganicBoxTemplate:OrganicBoxTemplate:OrganicBoxTemplate:OrganicBox |
Mol. mass | 424.49 g/mol |
SMILES | & |
Pharmacokinetic data | |
Bioavailability | ? |
Protein binding | 96.7% |
Metabolism | Hepatic glucuronidation |
Half life | 10-11 hours |
Excretion | Renal and biliary |
Therapeutic considerations | |
Pregnancy cat. |
D |
Legal status |
Template:Unicode Prescription only |
Routes | Oral |
- Benazepril hydrochloride is a white to off-white crystalline powder, soluble (>100 mg/mL) in water, in ethanol, and in methanol. Its chemical name is benazepril 3-[[1-(ethoxy-carbonyl)-3-phenyl-(1S)-propyl]amino]-2,3,4,5-tetrahydro-2-oxo-1H-1-(3S)-benzazepine-1-acetic acid monohydrochloride.
- Its empirical formula is C24H28N2O5•HCl, and its molecular weight is 460.96.
- Benazeprilat, the active metabolite of Benazepril, is a non-sulfhydryl angiotensin-converting enzyme inhibitor. Benazepril is converted to benazeprilat by hepatic cleavage of the ester group.
- Benazepril is supplied as tablets containing 5 mg, 10 mg, 20 mg, and 40 mg of benazepril hydrochloride for oral administration. The inactive ingredients are colloidal silicon dioxide, crospovidone, hydrogenated castor oil (5-mg, 10-mg, and 20-mg tablets), hypromellose, iron oxides, lactose, magnesium stearate (40-mg tablets), microcrystalline cellulose, polysorbate 80, propylene glycol (5-mg and 40-mg tablets), starch, talc, and titanium dioxide.
Pharmacodynamics
- Single and multiple doses of 10 mg or more of Benazepril cause inhibition of plasma ACE activity by at least 80%-90% for at least 24 hours after dosing. Pressor responses to exogenous angiotensin I were inhibited by 60%-90% (up to 4 hours post-dose) at the 10-mg dose.
Pharmacokinetics
- Following oral administration of Benazepril, peak plasma concentrations of Benazepril are reached within 0.5-1.0 hours. The extent of absorption is at least 37% as determined by urinary recovery and is not significantly influenced by the presence of food in the GI tract.
- Cleavage of the ester group (primarily in the liver) converts Benazepril to its active metabolite, benazeprilat. Peak plasma concentrations of benazeprilat are reached 1-2 hours after drug intake in the fasting state and 2-4 hours after drug intake in the nonfasting state. The serum protein binding of Benazepril is about 96.7% and that of benazeprilat about 95.3%, as measured by equilibrium dialysis; on the basis of in vitro studies, the degree of protein binding should be unaffected by age, hepatic dysfunction, or concentration (over the concentration range of 0.24-23.6 µmol/L).
- Benazepril is almost completely metabolized to benazeprilat, which has much greater ACE inhibitory activity than Benazepril, and to the glucuronide conjugates of Benazepril and benazeprilat. Only trace amounts of an administered dose of Benazepril can be recovered in the urine as unchanged Benazepril, while about 20% of the dose is excreted as benazeprilat, 4% as benazepril glucuronide, and 8% as benazeprilat glucuronide.
- The kinetics of Benazepril are approximately dose-proportional within the dosage range of 10-80 mg.
- In adults, the effective half-life of accumulation of benazeprilat following multiple dosing of benazepril hydrochloride is 10-11 hours. Thus, steady-state concentrations of benazeprilat should be reached after 2 or 3 doses of benazepril hydrochloride given once daily.
- The kinetics did not change, and there was no significant accumulation during chronic administration (28 days) of once-daily doses between 5 mg and 20 mg. Accumulation ratios based on AUC and urinary recovery of benazeprilat were 1.19 and 1.27, respectively.
- Benazepril and benazeprilat are cleared predominantly by renal excretion in healthy subjects with normal renal function. Nonrenal (i.e., biliary) excretion accounts for approximately 11%-12% of benazeprilat excretion in healthy subjects. In patients with renal failure, biliary clearance may compensate to an extent for deficient renal clearance.
- In patients with renal insufficiency, the disposition of benazepril and benazeprilat in patients with mild-to-moderate renal insufficiency (creatinine clearance >30 mL/min) is similar to that in patients with normal renal function. In patients with creatinine clearance <30 mL/min, peak benazeprilat levels and the initial (alpha phase) half-life increase, and time to steady state may be delayed (see Adult Indications and Dosage).
- When dialysis was started 2 hours after ingestion of 10 mg of Benazepril, approximately 6% of benazeprilat was removed in 4 hours of dialysis. The parent compound, Benazepril, was not detected in the dialysate.
- In patients with hepatic insufficiency (due to cirrhosis), the pharmacokinetics of benazeprilat are essentially unaltered. The pharmacokinetics of Benazepril and benazeprilat do not appear to be influenced by age.
- In pediatric patients, (N=45) hypertensive, age 6 to 16 years, given multiple daily doses of Benazepril (0.1 to 0.5 mg/kg), the clearance of benazeprilat for children 6 to 12 years old was 0.35 L/hr/kg, more than twice that of healthy adults receiving a single dose of 10 mg (0.13 L/hr/kg). In adolescents, it was 0.17 L/hr/kg, 27% higher than that of healthy adults. The terminal elimination half-life of benazeprilat in pediatric patients was around 5 hours, one-third that observed in adults.
Nonclinical Toxicology
- FDA Package Insert for Benazepril contains no information regarding Nonclinical Toxicology.
Clinical Studies
Hypertension
Adult
- In single-dose studies, Benazepril lowered blood pressure within 1 hour, with peak reductions achieved 2-4 hours after dosing. The antihypertensive effect of a single dose persisted for 24 hours. In multiple-dose studies, once-daily doses of 20-80 mg decreased seated pressure (systolic/diastolic) 24 hours after dosing by about 6-12/4-7 mmHg. The trough values represent reductions of about 50% of that seen at peak.
- Four dose-response studies using once-daily dosing were conducted in 470 mild-to-moderate hypertensive patients not using diuretics. The minimal effective once-daily dose of Benazepril was 10 mg; but further falls in blood pressure, especially at morning trough, were seen with higher doses in the studied dosing range (10-80 mg). In studies comparing the same daily dose of Benazepril given as a single morning dose or as a twice-daily dose, blood pressure reductions at the time of morning trough blood levels were greater with the divided regimen.
- The antihypertensive effects of Benazepril were not appreciably different in patients receiving high- or low-sodium diets.
- In normal human volunteers, single doses of Benazepril caused an increase in renal blood flow but had no effect on glomerular filtration rate.
- Use of Benazepril in combination with thiazide diuretics gives a blood-pressure-lowering effect greater than that seen with either agent alone. By blocking the renin-angiotensin-aldosterone axis, administration of Benazepril tends to reduce the potassium loss associated with the diuretic.
Pediatric
- In a clinical study of 107 pediatric patients, 7 to 16 years of age, with either systolic or diastolic pressure above the 95th percentile, patients were given 0.1 or 0.2 mg/kg then titrated up to 0.3 or 0.6 mg/kg with a maximum dose of 40 mg once daily. After four weeks of treatment, the 85 patients whose blood pressure was reduced on therapy were then randomized to either placebo or Benazepril and were followed up for an additional two weeks. At the end of two weeks, blood pressure (both systolic and diastolic) in children withdrawn to placebo rose by 4 to 6 mmHg more than in children on Benazepril. No dose-response was observed for the three doses.
How Supplied
- Benazepril is available in tablets of 5 mg, 10 mg, 20 mg, and 40 mg, packaged with a desiccant in bottles of 100 tablets.
- Each tablet is imprinted with Benazepril on one side and the tablet strength (“5,” “10,” “20,” or “40”) on the other.
- National Drug Code (NDC):
- Storage
- Do not store above 30°C (86°F). Protect from moisture. Dispense in tight container (USP).
- Manufactured by
- Novartis Pharmaceuticals Corporation, Suffern, New York 10901
- Distributed by
- Novartis Pharmaceuticals Corporation, East Hanover, New Jersey 07936
Images
Drug Images
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Package and Label Display Panel
Patient Information
Patient Information from FDA
- Pregnancy
- Female patients of childbearing age should be told about the consequences of exposure to Benazepril during pregnancy. Discuss treatment options with women planning to become pregnant. Patients should be asked to report pregnancies to their physicians as soon as possible.
- Angioedema
- Angioedema, including laryngeal edema, can occur at any time with treatment with ACE inhibitors. Patients should be so advised and told to report immediately any signs or symptoms suggesting angioedema (swelling of face, eyes, lips, or tongue, or difficulty in breathing) and to take no more drug until they have consulted with the prescribing physician.
- Symptomatic Hypotension
- Patients should be cautioned that lightheadedness can occur, especially during the first days of therapy, and it should be reported to the prescribing physician. Patients should be told that if syncope occurs, Benazepril should be discontinued until the prescribing physician has been consulted.
- All patients should be cautioned that inadequate fluid intake or excessive perspiration, diarrhea, or vomiting can lead to an excessive fall in blood pressure, with the same consequences of lightheadedness and possible syncope.
- Hyperkalemia
- Neutropenia
- Patients should be told to promptly report any indication of infection (e.g., sore throat, fever), which could be a sign of neutropenia.
Patient Information from NLM
For patient information about benazepril from NLM, click here.
Precautions with Alcohol
Alcohol-Benazepril interaction has not been established. Talk to your doctor about the effects of taking alcohol with this medication.
Brand Names
Lotensin®
Look-Alike Drug Names
Benazepril — Benadryl®
Lotensin® — Latensin®, Lioresal®, Lovastatin
Drug Shortage Status
Price
References
- ↑ "LOTENSIN (BENAZEPRIL HYDROCHLORIDE) TABLET [NOVARTIS PHARMACEUTICALS CORPORATION]".
- ↑ Yancy, CW.; Jessup, M.; Bozkurt, B.; Butler, J.; Casey, DE.; Drazner, MH.; Fonarow, GC.; Geraci, SA.; Horwich, T. (2013). "2013 ACCF/AHA guideline for the management of heart failure: a report of the American College of Cardiology Foundation/American Heart Association Task Force on practice guidelines". Circulation. 128 (16): e240–327. doi:10.1161/CIR.0b013e31829e8776. PMID 23741058. Unknown parameter
|month=
ignored (help) - ↑ O'Gara, PT.; Kushner, FG.; Ascheim, DD.; Casey, DE.; Chung, MK.; de Lemos, JA.; Ettinger, SM.; Fang, JC.; Fesmire, FM. (2013). "2013 ACCF/AHA guideline for the management of ST-elevation myocardial infarction: a report of the American College of Cardiology Foundation/American Heart Association Task Force on Practice Guidelines". Circulation. 127 (4): e362–425. doi:10.1161/CIR.0b013e3182742cf6. PMID 23247304. Unknown parameter
|month=
ignored (help) - ↑ 4.0 4.1 Maschio, G.; Alberti, D.; Locatelli, F.; Mann, JF.; Motolese, M.; Ponticelli, C.; Ritz, E.; Janin, G.; Zucchelli, P. (1999). "Angiotensin-converting enzyme inhibitors and kidney protection: the AIPRI trial. The ACE Inhibition in Progressive Renal Insufficiency (AIPRI) Study Group". J Cardiovasc Pharmacol. 33 Suppl 1: S16–20, discussion S41-3. PMID 10028949.
- ↑ 5.0 5.1 Maschio, G.; Alberti, D.; Janin, G.; Locatelli, F.; Mann, JF.; Motolese, M.; Ponticelli, C.; Ritz, E.; Zucchelli, P. (1996). "Effect of the angiotensin-converting-enzyme inhibitor benazepril on the progression of chronic renal insufficiency. The Angiotensin-Converting-Enzyme Inhibition in Progressive Renal Insufficiency Study Group". N Engl J Med. 334 (15): 939–45. doi:10.1056/NEJM199604113341502. PMID 8596594. Unknown parameter
|month=
ignored (help) - ↑ Neutel, JM.; Smith, DH.; Weber, MA. (2004). "Effect of antihypertensive monotherapy and combination therapy on arterial distensibility and left ventricular mass". Am J Hypertens. 17 (1): 37–42. PMID 14700510. Unknown parameter
|month=
ignored (help)
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