Terazosin, or Terazosin Hydrochloride, side effects are postural hypotension, weakness, and dizziness, and should be used as prescribed. The common dosage forms of Terazosin hydrochloride are tablets and capsules. The instructions state that the adverse effects of this product are weakness, dizziness, postural hypotension, drowsiness, nasal congestion, rhinitis, impotence, flu complication symptoms, headache, palpitations (rapid heartbeat, often accompanied by panic), syncope, nausea, peripheral edema, urinary tract infections, and respiratory distress. Terazosin hydrochloride can improve improve urinary hesitancy, the size of the urine stream and pressure damage, but also lower blood pressure and so on. It is used in the treatment of benign prostatic hyperplasia and hypertension. This product is contraindicated in people who are allergic to Terazosin Hydrochloride. Specific medication should be used under the supervision of a doctor.