Common Uses: It is used to treat erectile dysfunction (ED). In men, it is used to treat the signs of an enlarged prostate. It may be given to you for other reasons. Very Ineffective Moderately Can't tell Slightly effect Used for. # of reviews. Sexual dysfunction. Pulmonary hypertension. Erectile dysfunction. Jan 29, A wide range of treatment options exist for erectile dysfunction. These OTC treatments can interact with other drugs taken for ED, which could.