http://bestcanadadrugs.netMinipress (generic name: prazosin) is used for treating high blood pressure and benign prostatic hyperplasia (BPH). It may also be used for other conditions as determined by your doctor.Minipress is an alpha-blocker. The exact way it works is unknown, but it is thought to block a chemical in the body, causing blood vessels and the muscles around the urethra to relax. This helps to lower blood pressure and to improve urinary symptoms associated with enlargement of the prostate (BPH).Prazosin is in a class of drugs called alpha-adrenergic blockers. Prazosin causes the blood vessels (veins and arteries) to relax and expand, which allows blood to pass more easily through them. Prazosin is used to treat hypertension (high blood pressure).