Dolasetron mesylate
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Kiran Singh, M.D. [2]
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Overview
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Adult Indications and Dosage
FDA-Labeled Indications and Dosage (Adult)
Indications
ANZEMET Tablets are indicated for the prevention of nausea and vomiting associated with moderately emetogenic cancer chemotherapy, including initial and repeat courses in adults.
Dosage
The recommended doses of ANZEMET Tablets should not be exceeded.
Adults
- The recommended oral dosage of ANZEMET (dolasetron mesylate) is 100 mg given within one hour before chemotherapy.
Use in the Elderly, Renal Failure Patients, or Hepatically Impaired Patients
- No dosage adjustment is recommended, however; ECG monitoring is recommended for elderly and renally impaired patients.
Off-Label Use and Dosage (Adult)
Guideline-Supported Use
There is limited information regarding Off-Label Guideline-Supported Use of Dolasetron mesylate in adult patients.
Non–Guideline-Supported Use
There is limited information regarding Off-Label Non–Guideline-Supported Use of Dolasetron mesylate in adult patients.
Pediatric Indications and Dosage
FDA-Labeled Indications and Dosage (Pediatric)
Indications
ANZEMET Tablets are indicated for the prevention of nausea and vomiting associated with moderately emetogenic cancer chemotherapy, including initial and repeat courses in children 2 years and older.
Dosage
- The recommended oral dosage in pediatric patients 2 to 16 years of age is 1.8 mg/kg given within one hour before chemotherapy, up to a maximum of 100 mg. Safety and effectiveness in pediatric patients under 2 years of age have not been established.
- In children for whom the 100 mg tablet is not appropriate based on their weight or ability to swallow tablets, the ANZEMET Injection solution may be mixed into apple or apple-grape juice for oral dosing in pediatric patients. The diluted product may be kept up to 2 hours at room temperature before use. However, ANZEMET Injection solution when administered intravenously is contraindicated in adult and pediatric patients for the prevention of nausea and vomiting associated with initial and repeat courses of emetogenic cancer chemotherapy due to dose dependent QT prolongation.
Off-Label Use and Dosage (Pediatric)
Guideline-Supported Use
There is limited information regarding Off-Label Guideline-Supported Use of Dolasetron mesylate in pediatric patients.
Non–Guideline-Supported Use
There is limited information regarding Off-Label Non–Guideline-Supported Use of Dolasetron mesylate in pediatric patients.
Contraindications
- ANZEMET Tablets are contraindicated in patients known to have hypersensitivity to the drug.
Warnings
QT Interval Prolongation
- ANZEMET prolongs the QT interval in a dose dependent fashion. Torsade de Pointes has been reported during post-marketing experience. Avoid ANZEMET in patients with congenital long QT syndrome, hypomagnesemia, or hypokalemia. Hypokalemia and hypomagnesemia must be corrected prior to ANZEMET administration. Monitor these electrolytes after administration as clinically indicated. Use ECG monitoring in patients with congestive heart failure, bradycardia, renal impairment, and elderly patients.
PR and QRS Interval Prolongation
- ANZEMET has been shown to cause dose dependent prolongation of the PR and QRS interval and reports of second or third degree atrioventricular block, cardiac arrest and serious ventricular arrhythmias including fatalities in both adult and pediatric patients. At particular risk are patients with underlying structural heart disease and preexisting conduction system abnormalities, elderly, patients with sick sinus syndrome, patients with atrial fibrillation with slow ventricular response, patients with myocardial ischemia or patients receiving drugs known to prolong the PR interval (such as verapamil) and QRS interval (e.g., flecainide or quinidine). ANZEMET should be used with caution and with ECG monitoring in these patients. ANZEMET should be avoided in patients with complete heart block or at risk for complete heart block, unless they have an implanted pacemaker.
Serotonin Syndrome
- The development of serotonin syndrome has been reported with 5-HT3 receptor antagonists. Most reports have been associated with concomitant use of serotonergic drugs (e.g., selective serotonin reuptake inhibitors (SSRIs), serotonin and norepinephrine reuptake inhibitors (SNRIs), monoamine oxidase inhibitors, mirtazapine, fentanyl, lithium, tramadol, and intravenous methylene blue). Some of the reported cases were fatal. Serotonin syndrome occurring with overdose of another 5-HT3 receptor antagonist alone has also been reported. The majority of reports of serotonin syndrome related to 5-HT3 receptor antagonist use occurred in a post-anesthesia care unit or an infusion center.
- Symptoms associated with serotonin syndrome may include the following combination of signs and symptoms: mental status changes (e.g., agitation, hallucinations, delirium, and coma), autonomic instability (e.g., tachycardia, labile blood pressure, dizziness, diaphoresis, flushing, hyperthermia), neuromuscular symptoms (e.g., tremor, rigidity, myoclonus, hyperreflexia, incoordination), seizures, and/or gastrointestinal symptoms (e.g., nausea, vomiting, diarrhea). Patients should be monitored for the emergence of serotonin syndrome, especially with concomitant use of Anzemet and other serotonergic drugs. If symptoms of serotonin syndrome occur, discontinue Anzemet and initiate supportive treatment. Patients should be informed of the increased risk of serotonin syndrome, especially if Anzemet is used concomitantly with other serotonergic drugs.
Adverse Reactions
Clinical Trials Experience
- In controlled clinical trials, 943 adult cancer patients received ANZEMET Tablets. These patients were receiving concurrent chemotherapy, predominantly cyclophosphamide and doxorubicin regimens. The following adverse events were reported in ≥2% of patients receiving either ANZEMET 25 mg or ANZEMET 100 mg tablets for prevention of cancer chemotherapy induced nausea and vomiting in controlled clinical trials (Table 3).
- In clinical trials, the following reported adverse events, assessed by investigators as treatment-related or causality unknown, occurred following oral or intravenous administration of ANZEMET in < 2% of adult patients receiving concomitant cancer chemotherapy:
Cardiovascular:
- Hypotension; edema, peripheral edema. The following events also occurred and with a similar frequency as placebo and/or active comparator: Mobitz I AV block, chest pain, orthostatic hypotension, myocardial ischemia, syncope, severe bradycardia, and palpitations.
- In addition, the following asymptomatic treatment-emergent ECG changes were seen at rates less than or equal to those for active or placebo controls: bradycardia, T wave change, ST-T wave change, sinus arrhythmia, extrasystole (APCs or VPCs), poor R-wave progression, bundle branch block (left and right), nodal arrhythmia, U wave change, atrial flutter/fibrillation.
- Furthermore, severe hypotension, bradycardia and syncope have been reported immediately or closely following IV administration.
Dermatologic: Rash, increased sweating.
Gastrointestinal System: Constipation, dyspepsia, abdominal pain, anorexia; pancreatitis.
Hearing, Taste and Vision: Taste perversion, abnormal vision, tinnitus, photophobia.
Hematologic: Hematuria, epistaxis, prothrombin time prolonged, PTT increased, anemia, purpura/hematoma, thrombocytopenia.
Hypersensitivity: Anaphylactic reaction, facial edema, urticaria.
Liver and Biliary System: Transient increases in AST (SGOT) and/or ALT (SGPT) values have been reported as adverse events in less than 1% of adult patients receiving ANZEMET in clinical trials. The increases did not appear to be related to dose or duration of therapy and were not associated with symptomatic hepatic disease. Similar increases were seen with patients receiving active comparator. Hyperbilirubinemia, increased GGT.
Metabolic and Nutritional: Alkaline phosphatase increased.
Musculoskeletal: Myalgia, arthralgia.
Nervous System: Flushing, vertigo, paresthesia, tremor; ataxia, twitching.
Psychiatric: Agitation, sleep disorder, depersonalization; confusion, anxiety, abnormal dreaming.
Respiratory System: Dyspnea, bronchospasm.
Urinary System: Dysuria, polyuria, acute renal failure.
Vascular (Extracardiac): Local pain or burning on IV administration; peripheral ischemia, thrombophlebitis/phlebitis.
Postmarketing Experience
- There are reports of wide complex tachycardia or ventricular tachycardia and of ventricular fibrillation cardiac arrest following intravenous administration
Drug Interactions
- The potential for clinically significant drug-drug interactions posed by dolasetron and hydrodolasetron appears to be low for drugs commonly used in chemotherapy because hydrodolasetron is eliminated by multiple routes.
- When oral dolasetron (200 mg once daily) was coadministered with cimetidine (300 mg four times daily) for 7 days, the systemic exposure (i.e., AUC) of hydrodolasetron increased by 24% and the maximum plasma concentration of hydrodolasetron increased by 15%. When oral dolasetron (200 mg once daily) was coadministered with rifampin (600 mg once daily) for 7 days, the systemic exposure of hydrodolasetron decreased by 28% and the maximum plasma concentration of hydrodolasetron decreased by 17%.
- Caution should be exercised when ANZEMET is coadministered with drugs, including those used in chemotherapy, that prolong ECG intervals and/or cause hypokalemia or hypomagnesemia.
- In patients taking furosemide, nifedipine, diltiazem, ACE inhibitors, verapamil, glyburide, propranolol, and various chemotherapy agents, no effect was shown on the clearance of hydrodolasetron. Clearance of hydrodolasetron decreased by about 27% when dolasetron mesylate was administered intravenously concomitantly with atenolol. Dolasetron mesylate did not inhibit the antitumor activity of four chemotherapeutic agents (cisplatin, 5-fluorouracil, doxorubicin, cyclophosphamide) in four murine models.
- Serotonin syndrome (including altered mental status, autonomic instability, and neuromuscular abnormalities) has been described following the concomitant use of 5-HT3 receptor antagonists and other serotonergic drugs, including selective serotonin reuptake inhibitors (SSRIs) and serotonin and noradrenaline reuptake inhibitors (SNRIs).
Use in Specific Populations
Pregnancy
Pregnancy Category (FDA): Teratogenic Effects
Pregnancy Category B
- Teratology studies have not revealed evidence of impaired fertility or harm to the fetus due to dolasetron mesylate. These studies have been performed in pregnant rats at oral doses up to 100 mg/kg/day (8 times the recommended human dose based on body surface area) and pregnant rabbits at oral doses up to 100 mg/kg/day (16 times the recommended human dose based on body surface area). There are, however, no adequate and well-controlled studies in pregnant women. Because animal reproduction studies are not always predictive of human response, this drug should be used during pregnancy only if clearly needed.
- Australian Drug Evaluation Committee (ADEC) Pregnancy Category
There is no Australian Drug Evaluation Committee (ADEC) guidance on usage of Dolasetron mesylate in women who are pregnant.
Labor and Delivery
There is no FDA guidance on use of Dolasetron mesylate during labor and delivery.
Nursing Mothers
- It is not known whether dolasetron mesylate is excreted in human milk. Because many drugs are excreted in human milk, caution should be exercised when ANZEMET Tablets are administered to a nursing woman.
Pediatric Use
- Safety and effectiveness in pediatric patients (2 years and older) is based on pharmacokinetic studies and efficacy data in adults. Safety and effectiveness in pediatric patients under 2 years of age have not been established.
- ANZEMET Tablets are expected to be as safe and effective as when ANZEMET Injection is given orally to pediatric patients. ANZEMET Tablets are recommended for children old enough to swallow tablets
Geriatic Use
- Elderly patients are at particular risk for prolongation of the PR, QRS, and QT interval; therefore, caution should be exercised and ECG monitoring should be performed when using ANZEMET in this population.
- In controlled clinical trials in the prevention of chemotherapy-induced nausea and vomiting, 301 (29%) of 1026 patients were 65 years of age or older. Of the 301 geriatric patients in the trial, 282 received oral ANZEMET Tablets. No overall differences in safety or effectiveness were observed between geriatric and younger patients, and other reported clinical experience has not identified differences in responses between geriatric and younger patients, but greater sensitivity of some older individuals cannot be ruled out.
- The pharmacokinetics, including clearance of oral ANZEMET Tablets, in elderly and younger patients are similar. Dosage adjustment is not needed in patients over the age of 65.
Gender
There is no FDA guidance on the use of Dolasetron mesylate with respect to specific gender populations.
Race
There is no FDA guidance on the use of Dolasetron mesylate with respect to specific racial populations.
Renal Impairment
There is no FDA guidance on the use of Dolasetron mesylate in patients with renal impairment.
Hepatic Impairment
There is no FDA guidance on the use of Dolasetron mesylate in patients with hepatic impairment.
Females of Reproductive Potential and Males
There is no FDA guidance on the use of Dolasetron mesylate in women of reproductive potentials and males.
Immunocompromised Patients
There is no FDA guidance one the use of Dolasetron mesylate in patients who are immunocompromised.
Administration and Monitoring
Administration
- Oral
- Intravenous
Monitoring
There is limited information regarding Monitoring of Dolasetron mesylate in the drug label.
- Description
IV Compatibility
There is limited information regarding IV Compatibility of Dolasetron mesylate in the drug label.
Overdosage
- There is no known specific antidote for dolasetron mesylate, and patients with suspected overdose should be managed with supportive therapy. Individual doses as large as 5 mg/kg intravenously or 400 mg orally have been safely given to healthy volunteers or cancer patients.
- Following a suspected overdose of ANZEMET Injection, a patient found to have second-degree or higher AV conduction block with ECG should undergo cardiac telemetry monitoring.
- It is not known if dolasetron mesylate is removed by hemodialysis or peritoneal dialysis.
- Single intravenous doses of dolasetron mesylate at 160 mg/kg in male mice and 140 mg/kg in female mice and rats of both sexes (6.3 to 12.6 times the recommended human dose based on body surface area) were lethal. Symptoms of acute toxicity were tremors, depression and convulsions.
- A 59-year-old man with metastatic melanoma and no known pre-existing cardiac conditions developed severe hypotension and dizziness 40 minutes after receiving a 15 minute intravenous infusion of 1000 mg (13 mg/kg) of dolasetron mesylate. Treatment for the overdose consisted of infusion of 500 mL of a plasma expander, dopamine, and atropine. The patient had normal sinus rhythm and prolongation of PR, QRS and QTc intervals on an ECG recorded 2 hours after the infusion. The patient's blood pressure was normal 3 hours after the event and the ECG intervals returned to baseline on follow-up. The patient was released from the hospital 6 hours after the event.
Pharmacology
There is limited information regarding Dolasetron mesylate Pharmacology in the drug label.
Mechanism of Action
There is limited information regarding Dolasetron mesylate Mechanism of Action in the drug label.
Structure
- ANZEMET (dolasetron mesylate) is an antinauseant and antiemetic agent. Chemically, dolasetron mesylate is (2α,6α,8α,9aβ)-octahydro-3-oxo-2,6-methano-2H-quinolizin-8-yl-1H-indole-3-carboxylate monomethanesulfonate, monohydrate. It is a highly specific and selective serotonin subtype 3 (5-HT3) receptor antagonist both in vitro and in vivo. Dolasetron mesylate has the following structural formula:
- The empirical formula is C19H20N2O3 • CH3SO3H • H2O, with a molecular weight of 438.50. Approximately 74% of dolasetron mesylate monohydrate is dolasetron base.
- Dolasetron mesylate monohydrate is a white to off-white powder that is freely soluble in water and propylene glycol, slightly soluble in ethanol, and slightly soluble in normal saline.
- Each ANZEMET Tablet for oral administration contains dolasetron mesylate (as the monohydrate) and also contains the inactive ingredients: carnauba wax, croscarmellose sodium, hypromellose, lactose, magnesium stearate, polyethylene glycol, polysorbate 80, pregelatinized starch, synthetic red iron oxide, titanium dioxide, and white wax. The tablets are printed with black ink, which contains lecithin, pharmaceutical glaze, propylene glycol, and synthetic black iron oxide.
Pharmacodynamics
There is limited information regarding Pharmacodynamics of Dolasetron mesylate in the drug label.
Pharmacokinetics
- Oral dolasetron is well absorbed, although parent drug is rarely detected in plasma due to rapid and complete metabolism to the most clinically relevant species, hydrodolasetron.
- The reduction of dolasetron to hydrodolasetron is mediated by a ubiquitous enzyme, carbonyl reductase. Cytochrome P-450 (CYP)2D6 is primarily responsible for the subsequent hydroxylation of hydrodolasetron and both CYP3A and flavin monooxygenase are responsible for the N-oxidation of hydrodolasetron.
- Hydrodolasetron is excreted in the urine unchanged (61.0% of administered oral dose). Other urinary metabolites include hydroxylated glucuronides and N-oxide.
- Hydrodolasetron appears rapidly in plasma, with a maximum concentration occurring approximately 1 hour after dosing, and is eliminated with a mean half-life of 8.1 hours (%CV=18%) and an apparent clearance of 13.4 mL/min/kg (%CV=29%) in 30 adults. The apparent absolute bioavailability of oral dolasetron, determined by the major active metabolite hydrodolasetron, is approximately 75%. Orally administered dolasetron intravenous solution and tablets are bioequivalent. Food does not affect the bioavailability of dolasetron taken by mouth.
- Hydrodolasetron is eliminated by multiple routes, including renal excretion and, after metabolism, mainly, glucuronidation and hydroxylation. Two thirds of the administered dose is recovered in the urine and one third in the feces. Hydrodolasetron is widely distributed in the body with a mean apparent volume of distribution of 5.8 L/kg (%CV=25%, N=24) in adults.
- Sixty-nine to 77% of hydrodolasetron is bound to plasma protein. In a study with 14C labeled dolasetron, the distribution of radioactivity to blood cells was not extensive. Approximately 50% of hydrodolasetron is bound to α1-acid glycoprotein. The pharmacokinetics of hydrodolasetron are linear and similar in men and women.
- The pharmacokinetics of hydrodolasetron, in special and targeted patient populations following oral administration of dolasetron, are summarized in Table 1. The pharmacokinetics of hydrodolasetron are similar in adult (young and elderly) healthy volunteers and in adult cancer patients receiving chemotherapeutic agents. The apparent clearance following oral administration of hydrodolasetron is approximately 1.6- to 3.4-fold higher in children and adolescents than in adults. The clearance following oral administration of hydrodolasetron is not affected by age in adult cancer patients. The apparent oral clearance of hydrodolasetron decreases 42% with severe hepatic impairment and 44% with severe renal impairment. No dose adjustment is necessary for renally impaired or elderly patients, however ECG monitoring is recommended. No dose adjustment is recommended for patients with hepatic impairment.
- The pharmacokinetics of ANZEMET Tablets have not been studied in the pediatric population. However, the following pharmacokinetic data are available on intravenous ANZEMET Injection administered orally to children.
- Thirty-two pediatric cancer patients ages 3 to 11 years (N=19) and 12 to 17 years (N=13), received 0.6, 1.2, or 1.8 mg/kg ANZEMET Injection diluted with either apple or apple-grape juice and administered orally. In this study, the mean apparent clearances of hydrodolasetron were 3 times greater in the younger pediatric group and 1.8 times greater in the older pediatric group than those observed in healthy adult volunteers. Across this spectrum of pediatric patients, maximum plasma concentrations were 0.6 to 0.7 times those observed in healthy adults receiving similar doses.
- For 12 pediatric patients, ages 2 to 12 years receiving 1.2 mg/kg ANZEMET Injection diluted in apple or apple-grape juice and administered orally, the mean apparent clearance was 34% greater and half-life was 21% shorter than in healthy adults receiving the same dose.
- The table below summarizes the pharmacokinetic data from multiple populations. Please note that the doses studied may have exceeded the maximum recommended dose.
Nonclinical Toxicology
Carcinogenesis, Mutagenesis, Impairment of Fertility
- In a 24-month carcinogenicity study, there was a statistically significant (P<0.001) increase in the incidence of combined hepatocellular adenomas and carcinomas in male mice treated with 150 mg/kg/day and above. In this study, mice (CD-1) were treated orally with dolasetron mesylate 75, 150, or 300 mg/kg/day (225, 450 or 900 mg/m2/day). For a 50 kg person of average height (1.46 m2 body surface area), these doses represent 3, 6, and 12 times the recommended clinical dose (74 mg/m2) on a body surface area basis. No increase in liver tumors was observed at a dose of 75 mg/kg/day in male mice and at doses up to 300 mg/kg/day in female mice.
- In a 24-month rat (Sprague-Dawley) carcinogenicity study, oral dolasetron mesylate was not tumorigenic at doses up to 150 mg/kg/day (900 mg/m2/day, 12 times the recommended human dose based on body surface area) in male rats and 300 mg/kg/day (1800 mg/m2/day, 24 times the recommended human dose based on body surface area) in female rats.
- Dolasetron mesylate was not genotoxic in the Ames test, the rat lymphocyte chromosomal aberration test, the Chinese hamster ovary (CHO) cell (HGPRT) forward mutation test, the rat hepatocyte unscheduled DNA synthesis (UDS) test or the mouse micronucleus test.
- Dolasetron mesylate was found to have no effect on fertility and reproductive performance at oral doses up to 100 mg/kg/day (600 mg/m2/day, 8 times the recommended human dose based on body surface area) in female rats and up to 400 mg/kg/day (2400 mg/m2/day, 32 times the recommended human dose based on body surface area) in male rats.
Clinical Studies
- Oral ANZEMET at a dose of 100 mg prevents nausea and vomiting associated with moderately emetogenic cancer therapy as shown by 24 hour efficacy data from two double-blind studies. Efficacy was based on complete response (i.e., no vomiting, no rescue medication).
- The first randomized, double-blind trial compared single oral ANZEMET doses of 25, 50, 100 and 200 mg in 60 men and 259 women cancer patients receiving cyclophosphamide and/or doxorubicin. There was no statistically significant difference in complete response between the 100 mg and 200 mg dose. Results are summarized in Table 2.
- Another trial also compared single oral ANZEMET doses of 25, 50, 100, and 200 mg in 307 patients receiving moderately emetogenic chemotherapy. In this study, the 100 mg ANZEMET dose gave a 73% complete response rate.
How Supplied
This image is provided by the National Library of Medicine.
Storage
- Store at controlled room temperature 20–25°C (68–77°F). Protect from light.
Images
Drug Images
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Patient Counseling Information
- Patients should be informed that ANZEMET may cause serious cardiac arrhythmias such as QT prolongation or heart block. Patients should be instructed to tell their health care provider right away if they perceive a change in their heart rate, if they feel lightheaded, or if they have a syncopal episode.
- Patients should be informed that the chances of developing serious cardiac arrhythmias such as QT prolongation and Torsade de Pointes or heart block are higher in the following people:
- Patients with a personal or family history of abnormal heart rhythms, such as congenital long QT syndrome
- Patients with a personal history of sick sinus syndrome, atrial fibrillation with slow ventricular response or myocardial ischemia
- Patients who take medications that may prolong the PR interval, such as certain antihypertensives or medications that may prolong the QRS interval, such as antiarrythmic medications
- Patients who take medications, such as diuretics, which may cause electrolyte abnormalities
- Patients with hypokalemia or hypomagnesemia. Some types of chemotherapy cause hypokalemia and hypomagnesemia
- Elderly patients and renally impaired patients
- ANZEMET should be avoided in these patients, since they may be more at risk for cardiac arrhythmias such as QT prolongation and Torsade de Pointes.
- Advise patients of the possibility of serotonin syndrome with concomitant use of Anzemet and another serotonergic agent such as medications to treat depression and migraines. Advise patients to seek immediate medical attention if the following symptoms occur: changes in mental status, autonomic instability, neuromuscular symptoms with or without gastrointestinal symptoms.
Precautions with Alcohol
- Alcohol-Dolasetron mesylate interaction has not been established. Talk to your doctor about the effects of taking alcohol with this medication.
Brand Names
- ANZEMET
Look-Alike Drug Names
- A® — B®[1]
Drug Shortage Status
Price
References
The contents of this FDA label are provided by the National Library of Medicine.
- ↑ "http://www.ismp.org". External link in
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