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Medically Verified MonographPrescription OnlyClass: Alpha-1 Blockers

Terazosin

Generic Name: Terazosin

Common Brand Names: Hytrin
Dosage Form:Capsule
Route:Oral
Pregnancy Category:C
Last Reviewed:9/21/2026

Seek Urgent Medical Attention If:

You experience severe allergic reaction symptoms (swelling of the face, lips, tongue, or throat causing difficulty breathing), severe rash with skin peeling, sudden intense chest pain, or symptoms of overdose. Call emergency medical services immediately.

Uses & Medical Indications

Treatment of hypertension and BPH

Medical Conditions Treated:

Hypertension, Benign prostatic hyperplasia

Dosage & Administration Guidelines

Adult Dosage

1 mg at bedtime initially, titrate up

Pediatric Dosage

Not established

Elderly / Geriatric Considerations

Start low, titrate slowly

Maximum Dose Limit

20 mg per day for hypertension; 10 mg for BPH

Renal Impairment:

No adjustment required

Hepatic Impairment:

Use with caution

Side Effects & Safety Warnings

Common Side Effects

Dizziness, asthenia, nasal congestion, somnolence

Serious Adverse Reactions

First-dose syncope, priapism

Contraindications:

Hypersensitivity to terazosin or quinazolines

Important Warnings & Precautions:

Risk of syncope and postural hypotension

Interactions (Drugs, Food & Alcohol)

Drug-Drug Interactions:

Other antihypertensives, PDE5 inhibitors

Food & Dietary Interactions:

N/A

Alcohol Interaction Warning:

May worsen orthostatic hypotension

Pregnancy & Breastfeeding Safety

Pregnancy Safety

Use only if clearly needed

Breastfeeding / Lactation

Unknown if excreted in milk, use caution

Patient Counseling & Practical Advice

How to Take:

Take first dose at bedtime to avoid syncope. Rise slowly.

What to Do if You Miss a Dose:

If missed for several days, restart at 1 mg dose

Recommended Monitoring & Lab Tests:

Blood pressure, urinary symptoms

Related Medicines in Alpha-1 Blockers

Trustworthy Sources & Medical Review

Content for Terazosin was synthesized and fact-checked against standardized regulatory monographs, official pharmacopoeias, and national health authorities:

  • Central Drugs Standard Control Organization (CDSCO) — National List of Essential Medicines
  • World Health Organization (WHO) — Model List of Essential Medicines 23rd List
  • Indian Pharmacopoeia Commission (IPC) — Indian Pharmacopoeia Drug Monographs
  • National Health Service (NHS) — Medicines A to Z Clinical Guidelines
Reviewer Credentials: PharmD, Clinical PharmacologistLast Reviewed Date: 9/21/2026

The information provided on this website is for educational purposes only and is not intended as a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of a qualified healthcare provider with any questions you may have regarding a medical condition.