5mgProscar is the brand name for a synthetic steroid that comes in tablet form. Its generic name is finasteride, and it is used to treat symptomatic benign prostate hyperplasia, or BPH with symptoms. BPH is a condition found in men in which their prostate is enlarged, but the condition is benign and not due to cancer. Taking Proscar can also reduce the risk of surgery for an enlarged prostate. It is sometimes prescribed to be taken in conjunction with an alpha-blocker called doxazosin to reduce symptoms even more.