Prazosin

Prazosin
Adult Indications & Dosage
Pediatric Indications & Dosage
Contraindications
Warnings & Precautions
Adverse Reactions
Drug Interactions
Use in Specific Populations
Administration & Monitoring
Overdosage
Pharmacology
Clinical Studies
How Supplied
Images
Patient Counseling Information
Precautions with Alcohol
Brand Names
Look-Alike Names

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: João André Alves Silva, M.D. [2]

Disclaimer

WikiDoc MAKES NO GUARANTEE OF VALIDITY. WikiDoc is not a professional health care provider, nor is it a suitable replacement for a licensed healthcare provider. WikiDoc is intended to be an educational tool, not a tool for any form of healthcare delivery. The educational content on WikiDoc drug pages is based upon the FDA package insert, National Library of Medicine content and practice guidelines / consensus statements. WikiDoc does not promote the administration of any medication or device that is not consistent with its labeling. Please read our full disclaimer here.

Overview

Prazosin is a alpha-adrenergic blocker that is FDA approved for the {{{indicationType}}} of treatment of hypertension. Common adverse reactions include orthostatic hypotension, palpitations, nausea, asthenia, dizziness, headache, lethargy and somnolence.

Adult Indications and Dosage

FDA-Labeled Indications and Dosage (Adult)

Hypertension

• Initial dose:

• 1 mg two or three times a day

• Maintenance dose:

• Dosage may be slowly increased to a total daily dose of 20 mg given in divided doses. The therapeutic dosages most commonly employed have ranged from 6 mg to 15 mg daily given in divided doses. Doses higher than 20 mg usually do not increase efficacy, however a few patients may benefit from further increases up to a daily dose of 40 mg given in divided doses. After initial titration some patients can be maintained adequately on a twice daily dosage regimen.

• Use with other drugs:

• When adding a diuretic or other antihypertensive agent, the dose of prazosin should be reduced to 1 mg or 2 mg three times a day and retitration then carried out.
• Concomitant administration of prazosin with a PDE-5 inhibitor can result in additive blood pressure lowering effects and symptomatic hypotension; therefore, PDE-5 inhibitor therapy should be initiated at the lowest dose in patients taking prazosin.

Off-Label Use and Dosage (Adult)

Guideline-Supported Use

Benign prostatic hyperplasia

• Class of Recommendation: Class IIb

• Strength of Evidence: Category B

• Dosing Information/Recommendation

• (Dosage)

Dream disorder - posttraumatic stress disorder

• Class of Recommendation: Class IIb

• Strength of Evidence: Category B

• A 6-week open-label trial, with 5 patients, with history of exposure to civilian trauma, in a non-military environment, who subsequently developed posttraumatic stress disorder (PTSD):

• 1 to 4 mg/day

• An 8-week open-label trial, with 4 patients, with history of combat trauma nightmares and chronic DSM-IV posttraumatic stress disorder (PTSD) with concomitant severe intractable combat trauma nightmares:

• 2 to 10 mg/day

Erectile dysfunction

• Class of Recommendation: Class IIb

• Strength of Evidence: Category B

• Dosing Information/Recommendation

• (Dosage)

Poisoning due to scorpion venom

• Class of Recommendation: Class IIb

• Strength of Evidence: Category B

• Dosing Information/Recommendation

• (Dosage)

Raynaud's phenomenon

• Class of Recommendation: Class IIb

• Strength of Evidence: Category B

• Dosing Information/Recommendation

• (Dosage)

Non–Guideline-Supported Use

Condition 1

• Dosing Information

• (Dosage)

Condition 2

• Dosing Information

• (Dosage)

Condition 3

• Dosing Information

• (Dosage)

Pediatric Indications and Dosage

FDA-Labeled Indications and Dosage (Pediatric)

Condition 1

• Dosing Information

• (Dosage)

Condition 2

• Dosing Information

• (Dosage)

Off-Label Use and Dosage (Pediatric)

Guideline-Supported Use

Condition 1

• Developed by: (Organisation)

• Class of Recommendation: (Class) (Link)

• Strength of Evidence: (Category A/B/C) (Link)

• Dosing Information/Recommendation

• (Dosage)

Condition 2

• Developed by: (Organisation)

• Class of Recommendation: (Class) (Link)

• Strength of Evidence: (Category A/B/C) (Link)

• Dosing Information/Recommendation

• (Dosage)

Non–Guideline-Supported Use

Condition 1

• Dosing Information

• (Dosage)

Condition 2

• Dosing Information

• (Dosage)

Condition 3

• Dosing Information

• (Dosage)

Contraindications

• Condition 1
• Condition 2
• Condition 3
• Condition 4
• Condition 5

Warnings

Conidition 1

(Description)

Adverse Reactions

Clinical Trials Experience

Central Nervous System

(list/description of adverse reactions)

Cardiovascular

(list/description of adverse reactions)

Respiratory

(list/description of adverse reactions)

Gastrointestinal

(list/description of adverse reactions)

Hypersensitive Reactions

(list/description of adverse reactions)

Miscellaneous

(list/description of adverse reactions)

Condition 2

Central Nervous System

(list/description of adverse reactions)

Cardiovascular

(list/description of adverse reactions)

Respiratory

(list/description of adverse reactions)

Gastrointestinal

(list/description of adverse reactions)

Hypersensitive Reactions

(list/description of adverse reactions)

Miscellaneous

(list/description of adverse reactions)

Postmarketing Experience

(Description)

Drug Interactions

• Drug 1
• Drug 2
• Drug 3
• Drug 4
• Drug 5

Drug 1

(Description)

Drug 2

(Description)

Drug 3

(Description)

Drug 4

(Description)

Drug 5

(Description)

Use in Specific Populations

Pregnancy

Pregnancy Category (FDA): (Description)
Pregnancy Category (AUS): (Description)

Labor and Delivery

(Description)

Nursing Mothers

(Description)

Pediatric Use

(Description)

Geriatic Use

(Description)

Gender

(Description)

Race

(Description)

Renal Impairment

(Description)

Hepatic Impairment

(Description)

Females of Reproductive Potential and Males

(Description)

Immunocompromised Patients

(Description)

Others

(Description)

Administration and Monitoring

Administration

(Oral/Intravenous/etc)

Monitoring

Condition 1

(Description regarding monitoring, from Warnings section)

Condition 2

(Description regarding monitoring, from Warnings section)

Condition 3

(Description regarding monitoring, from Warnings section)

IV Compatibility

Solution

Compatible

• Solution 1
• Solution 2
• Solution 3

Not Tested

• Solution 1
• Solution 2
• Solution 3

Variable

• Solution 1
• Solution 2
• Solution 3

Incompatible

• Solution 1
• Solution 2
• Solution 3

Y-Site

Compatible

• Solution 1
• Solution 2
• Solution 3

Not Tested

• Solution 1
• Solution 2
• Solution 3

Variable

• Solution 1
• Solution 2
• Solution 3

Incompatible

• Solution 1
• Solution 2
• Solution 3

Admixture

Compatible

• Solution 1
• Solution 2
• Solution 3

Not Tested

• Solution 1
• Solution 2
• Solution 3

Variable

• Solution 1
• Solution 2
• Solution 3

Incompatible

• Solution 1
• Solution 2
• Solution 3

Syringe

Compatible

• Solution 1
• Solution 2
• Solution 3

Not Tested

• Solution 1
• Solution 2
• Solution 3

Variable

• Solution 1
• Solution 2
• Solution 3

Incompatible

• Solution 1
• Solution 2
• Solution 3

TPN/TNA

Compatible

• Solution 1
• Solution 2
• Solution 3

Not Tested

• Solution 1
• Solution 2
• Solution 3

Variable

• Solution 1
• Solution 2
• Solution 3

Incompatible

• Solution 1
• Solution 2
• Solution 3

Overdosage

Acute Overdose

Signs and Symptoms

(Description)

Management

(Description)

Chronic Overdose

Signs and Symptoms

(Description)

Management

(Description)

Pharmacology

Prazosin
Systematic (IUPAC) name
?
Identifiers
CAS number	?
ATC code	?
PubChem	?
Chemical data
Formula	?
Mol. mass	?
Pharmacokinetic data
Bioavailability	?
Metabolism	?
Half life	?
Excretion	?
Therapeutic considerations
Pregnancy cat.	?
Legal status
Routes	?

Mechanism of Action

(Description)

Structure

(Description with picture)

Pharmacodynamics

(Description)

Pharmacokinetics

(Description)

Nonclinical Toxicology

(Description)

Clinical Studies

Condition 1

(Description)

Condition 2

(Description)

Condition 3

(Description)

How Supplied

(Description)

Storage

There is limited information regarding Prazosin Storage in the drug label.

Images

Drug Images

{{#ask: Page Name::Prazosin |?Pill Name |?Drug Name |?Pill Ingred |?Pill Imprint |?Pill Dosage |?Pill Color |?Pill Shape |?Pill Size (mm) |?Pill Scoring |?NDC |?Drug Author |format=template |template=DrugPageImages |mainlabel=- |sort=Pill Name }}

Package and Label Display Panel

{{#ask: Label Page::Prazosin |?Label Name |format=template |template=DrugLabelImages |mainlabel=- |sort=Label Page }}

Patient Counseling Information

(Patient Counseling Information)

Precautions with Alcohol

Alcohol-Prazosin interaction has not been established. Talk to your doctor about the effects of taking alcohol with this medication.

Brand Names

There is limited information regarding Prazosin Brand Names in the drug label.

Look-Alike Drug Names

• (Paired Confused Name 1a) — (Paired Confused Name 1b)
• (Paired Confused Name 2a) — (Paired Confused Name 2b)
• (Paired Confused Name 3a) — (Paired Confused Name 3b)

Drug Shortage Status

Drug Shortage

Price

References

The contents of this FDA label are provided by the National Library of Medicine.