Alphapress 1 mg Tablet contains Prazosin Hydrochloride, an alpha-1 adrenergic antagonist that works by relaxing blood vessels, thereby lowering blood pressure. It is primarily used to treat hypertension (high blood pressure) and symptoms of benign prostatic hyperplasia (BPH), such as difficulty urinating. Additionally, it can be used to manage symptoms of post-traumatic stress disorder (PTSD) and Raynaud's disease.