Terazosin is used to treat high blood pressure. Terazosin helps to lower blood pressure by relaxing blood vessels so that blood passes through them more easily. It is also used to treat benign enlargement of the prostate.
Be sure to tell your doctor of any allergies you have whether it is to medication or food, preservatives, or dyes. Tell your doctor immediately if you are, or become pregnant, or are breastfeeding, as it is unknown how Terazosin may affect your baby. Also, tell your doctor of any other medications you are taking, including vitamins and supplements, and any medical conditions you may have.
It is very important that you take this medicine exactly as your doctor tells you to. Do not take more or less medicine than directed, and never stop taking Terazosin without discussing it with your doctor first.
If you miss a dose of this medicine, take it as soon as you remember, unless it is almost time for your next dose. Do NOT double doses.
Tell your doctor as soon as possible if any of the following side effects occur: dizziness; chest pain; dizziness or lightheadedness when getting up from a lying or sitting position; fainting (sudden); fast or irregular heartbeat; pounding heartbeat; shortness of breath; swelling of feet or lower legs; and weight gain.
HYTRIN (terazosin hydrochloride), an alpha-1-selective adrenoceptor blocking agent, is a quinazoline derivative represented by the following chemical name and structural formula:(RS)-Piperazine, 1-(4-amino-6, 7-dimethoxy-2-quinazolinyl)-4- [(tetra-hydro-2-furanyl)carbonyl]-, monohydrochloride, dihydrate. Terazosin hydrochloride is a white, crystalline substance, freely soluble in water and isotonic saline and has a molecular weight of 459.93. HYTRIN capsules (terazosin hydrochloride capsules) for oral ingestion are supplied in four dosage strengths containing terazosin hydrochloride equivalent to 1 mg, 2 mg, 5 mg, or 10 mg of terazosin.
1 mg capsules:gelatin, glycerin, iron oxide, methylparaben, mineral oil, polyethylene glycol, povidone, propylparaben, titanium dioxide, and vanillin.
2 mg capsules:D&C yellow No. 10, gelatin, glycerin, methylparaben, mineral oil, polyethylene glycol, povidone, propylparaben, titanium dioxide, and vanillin.
5 mg capsules: D&C red No. 28, FD&C red No. 40, gelatin, glycerin, methylparaben, mineral oil, polyethylene glycol, povidone, propylparaben, titanium dioxide, and vanillin.
10 mg capsules:FD&C blue No. 1, gelatin, glycerin, methylparaben, mineral oil, polyethylene glycol, povidone, propylparaben, titanium dioxide, and vanillin.
Terazosin has the following structural formula: