Terazosin (By mouth)

There may be other brand names for this medicine.

You should not use this medicine if you have ever had an allergic reaction to terazosin.

Your doctor will tell you how much of this medicine to take and how often. Your dose may need to be changed several times in order to find out what works best for you. Do not take more medicine or take it more often than your doctor tells you to.
Take this medicine at bedtime unless your doctor tells you otherwise.
Carefully follow your doctor's instructions about any special diet.

If you miss a dose or forget to take your medicine, take it as soon as you can. If it is almost time for your next dose, wait until then to take the medicine and skip the missed dose. Do not use extra medicine to make up for a missed dose.

Store the medicine at room temperature in a closed container, away from heat, moisture, and direct light. Ask your pharmacist, doctor, or health caregiver about the best way to dispose of any outdated medicine or medicine no longer needed.
Keep all medicine away from children and never share your medicine with anyone.

Make sure your doctor knows if you are also using verapamil (Calan®, Covera®), diuretics or "water pills" (such as furosemide, hydrochlorothiazide, Aldactazide®, Aldactone®, Dyazide®, Hyzaar®, Lasix®, Lotrel®, Maxzide®, Moduretic®, Norvasc®, Zestoretic®), or any other blood pressure medicine (such as atenolol, metoprolol, Accupril®, Altace®, Cardizem®, Cardura®, Lotensin®, Lotrel®, Monopril®, Plendil®, Prinivil®, Tiazac®, Toprol®, Vasotec®, Zestril®).
Do not drink alcohol while you are using this medicine.

Make sure your doctor knows if you are pregnant or breastfeeding.
If you stop using this medicine, your blood pressure may go up. High blood pressure usually has no symptoms. Even if you feel well, do not stop using the medicine without asking your doctor.
Do not stop using this medicine without asking your doctor. If you have not taken the medicine for several days, you will need to use a lower dose when you start taking it again.
Your doctor will need to check your progress at regular visits while you are using this medicine. Be sure to keep all appointments.
This medicine may make you dizzy or drowsy. Avoid driving, using machines, or doing anything else that could be dangerous if you are not alert.

Allergic reaction: Itching or hives, swelling in face, lips, or hands, swelling or tingling in the mouth or throat, tightness in chest, trouble breathing
Chest pain (may be related to your disease and not a side effect)
Fast or pounding heartbeat
Fever, chills, sore throat
Lightheadedness or fainting
Numbness or tingling in the hands or feet
Prolonged or painful erection
Swelling in the hands, ankles, or feet, rapid weight gain

Last Updated: 1/27/2017