TERAZOSIN- terazosin capsule 
St Mary's Medical Park Pharmacy




(ter ay'zoe sin)

Rx only


Please read this leaflet before you start taking terazosin capsules. Also, read it each time you get a new prescription. This is a summary and should NOT take the place of a full discussion with your doctor who has additional information about terazosin capsules. You and your doctor should discuss terazosin capsules and your condition before you start taking it and at your regular check-ups.

Terazosin capsules are used to treat high blood pressure (hypertension). Terazosin capsules are also used to treat benign prostatic hyperplasia (BPH) in men. This leaflet describes terazosin capsules as a treatment for hypertension or BPH.

What is hypertension (high blood pressure)?

Blood pressure is the tension of the blood within the blood vessels. If blood is pumped too forcefully, or if the blood vessels are too narrow, the pressure of the blood against the walls of the vessels rises.

If high blood pressure is not treated, over time, the increased pressure can damage blood vessels or it can cause the heart to work too hard and may decrease the flow of blood to the heart, brain, and kidneys. As a result, these organs may become damaged and not function correctly. If high blood pressure is controlled, this damage is less likely to happen.

Treatment options for hypertension

Non-drug treatments are sometimes effective in controlling mild hypertension. The most important lifestyle changes to lower blood pressure are to lose weight, reduce salt, fat, and alcohol in the diet, quit smoking, and exercise regularly. However, many hypertensive patients require one or more ongoing medications to control their blood pressure. There are different kinds of medications used to treat hypertension. Your doctor has prescribed terazosin capsules for you.

What Terazosin Capsules do to treat hypertension

Terazosin capsules work by relaxing blood vessels so that blood passes through them more easily. This helps to lower blood pressure.

What is BPH?

The prostate is a gland located below the bladder of men. It surrounds the urethra (you-REETH-rah), which is a tube that drains urine from the bladder. BPH is an enlargement of the prostate gland. The symptoms of BPH, however, can be caused by an increase in the tightness of muscles in the prostate. If the muscles inside the prostate tighten, they can squeeze the urethra and slow the flow of urine. This can lead to symptoms such as:

Treatment options for BPH

There are three main treatment options for BPH:

What Terazosin Capsules do to treat BPH

Terazosin capsules relax the tightness of a certain type of muscle in the prostate and at the opening of the bladder. This may increase the rate of urine flow and/or decrease the symptoms you are having.

Other important facts about Terazosin Capsules for BPH

What you should know while taking Terazosin Capsules for hypertension or BPH


Terazosin Capsules Can Cause A Sudden Drop In Blood Pressure After the VERY FIRST DOSE. You may feel dizzy, faint, or "lightheaded" particularly after you get up from bed or from a chair. This is more likely to occur after you've taken the first few doses, but can occur at any time while you are taking the drug. It can also occur if you stop taking the drug and then re-start treatment.

Because of this effect, your doctor may have told you to take terazosin capsules at bedtime. If you take terazosin capsules at bedtime but need to get up from bed to go to the bathroom, get up slowly and cautiously until you are sure how the medicine affects you. It is also important to get up slowly from a chair or bed at any time until you learn how you react to terazosin capsules . You should not drive or do any hazardous tasks until you are used to the effects of the medication. If you begin to feel dizzy, sit or lie down until you feel better.

Extremely rarely, terazosin capsules and similar medications have caused painful erection of the penis, sustained for hours and unrelieved by sexual intercourse or masturbation. This condition is serious, and if untreated it can be followed by permanent inability to have an erection. If you have a prolonged abnormal erection, call your doctor or go to an emergency room as soon as possible.

"Call you doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088."

How to take Terazosin Capsules

Follow your doctor's instructions about how to take terazosin capsules. You must take it every day at the dose prescribed. Talk with your doctor if you don't take it for a few days, you may have to restart it at a 1 mg dose and be cautious about possible dizziness. Do not share terazosin capsules with anyone else; it was prescribed only for you.

Keep terazosin capsules and all medicines out of the reach of children.

Store at 20° to 25°C (68° to 77°F) [See USP Controlled Room Temperature].



This Patient information has been approved by the U.S. Food and Drug Administration.

Dispense with Patient Information available at: www.avetpharma.com/product

Distributed by:

Avet Pharmaceuticals Inc.

East Brunswick, NJ 08816

1.866.901.DRUG (3784)   



Revised: 08/2021


Revised: 6/2022
St Mary's Medical Park Pharmacy