What is this medication for?
Terazosin belongs to the class of medications known as alpha-receptor blockers. It is used to treat high blood pressure. It relaxes blood vessels, allowing blood to flow through them more easily. It may be used alone or together with other medications for high blood pressure.
Terazosin is also used to treat enlarged prostate (benign prostatic hypertrophy or BPH). For BPH, terazosin helps to relax the muscles in the prostate and bladder. This helps to improve urine flow and decrease symptoms of BPH. Terazosin does not slow or stop the progression of enlarged prostate.
Your doctor may have suggested this medication for conditions other than those listed here. As well, some forms of this medication may not be used for all of the conditions discussed here. If you are not sure why you are taking this medication, speak to your doctor. Do not stop taking this medication without consulting your doctor.
Do not give this medication to anyone else, even if they have the same symptoms as you do. It can be harmful for people to take this medication if their doctor has not prescribed it.
Some medications may have other generic brands available. Always ask your doctor or pharmacist about the safety of switching between brands of the same medication.
How should I use this medication?
The recommended adult dose of terazosin for high blood pressure starts at 1 mg at bedtime and is slowly increased until the desired blood pressure response is achieved. The usual dose ranges from 1 mg to 5 mg daily up to a maximum of 20 mg per day.
The recommended adult dose of terazosin for treatment of enlarged prostate starts at 1 mg at bedtime, with increases at weekly intervals to 2 mg, 5 mg, or 10 mg once daily to achieve the desired improvement of symptoms.
Many things can affect the dose of medication that a person needs, such as body weight, other medical conditions, and other medications. If your doctor has recommended a dose different from the ones listed here, do not change the way that you are taking the medication without consulting your doctor.
It is important to take this medication exactly as prescribed by your doctor. If you miss a dose, take it as soon as possible and continue with your regular schedule. If it is almost time for your next dose, skip the missed dose and continue with your regular dosing schedule. Do not take a double dose to make up for a missed one. If you are not sure what to do after missing a dose, contact your doctor or pharmacist for advice.
Store this medication at room temperature, protect it from light and moisture, and keep it out of the reach of children.
Who should NOT take this medication?
Do not take this medication if you:
- are allergic to terazosin or any ingredients of the medication
- are allergic to similar medications from the same class (e.g., doxazosin, prazosin)