Terazosin — Uses, Dosage, Side Effects & Safety
Drug class: Alpha-1 adrenergic blocker (antihypertensive, urologic agent)
Overview
Terazosin is a prescription medication used to treat high blood pressure (hypertension) and symptoms of benign prostatic hyperplasia (BPH), a non-cancerous enlargement of the prostate gland in men. By relaxing the muscles in blood vessels and the prostate, Terazosin helps lower blood pressure and makes it easier to urinate if you have BPH. This medication works by blocking alpha-1 adrenergic receptors, which causes blood vessels to widen and the muscles in the prostate and bladder neck to relax. This action helps improve urine flow and reduces symptoms such as difficulty starting urination, weak stream, and frequent urination at night. Key points for patients: Terazosin should be taken exactly as prescribed, usually once daily. It may cause dizziness, especially when you first start taking it or when your dose is increased. To reduce the risk of dizziness or fainting, take your first dose at bedtime and rise slowly from sitting or lying positions.
Therapeutic uses
- Hypertension
- Benign Prostatic Hyperplasia (BPH)
- Urinary retention associated with BPH
Common side effects
- Dizziness
- Orthostatic hypotension
- Headache
- Palpitations
- Nausea
- Fatigue
- Syncope
Frequently Asked Questions about Terazosin
What is Terazosin used for?
Terazosin is used to treat high blood pressure (hypertension) and symptoms of benign prostatic hyperplasia (BPH) in men.
How long does it take for Terazosin to work?
Some improvement in BPH symptoms may be noticed within a few days, but it may take up to 2–4 weeks for full benefits. Blood pressure effects are usually seen within hours of the first dose.
Can women take Terazosin?
Terazosin is not typically prescribed for women, as its main uses are for hypertension and BPH, which affects men. It should only be used in women if specifically directed by a doctor.
What should I do if I feel dizzy after taking Terazosin?
Sit or lie down immediately if you feel dizzy. Rise slowly from sitting or lying positions. If dizziness persists or is severe, contact your healthcare provider.
Can Terazosin be taken with other blood pressure medications?
Yes, but combining Terazosin with other antihypertensives may increase the risk of low blood pressure. Your doctor will monitor you closely and adjust doses as needed.
Is it safe to drink alcohol while taking Terazosin?
Alcohol can increase the risk of side effects such as dizziness or fainting. It is best to limit or avoid alcohol while taking Terazosin.
What should I tell my surgeon before cataract surgery?
Inform your eye surgeon if you are taking or have ever taken Terazosin, as it can affect your pupils during surgery (Intraoperative Floppy Iris Syndrome).
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Educational information only. Always consult a qualified healthcare professional before starting, stopping, or changing any medication.