prostride capsules to treat benign prostatic hyperplasia. prostride tablets help treat prostate enlargement when symptoms occur and treat the annoying symptoms that result from it. It contains finasteride as an active substance that belongs to the class of medicines known as 5-alpha reductase inhibitors, which works to prevent the production of the male hormone that causes prostate enlargement. It also contributes to treating hair loss resulting from an increase in the male hormone in the body.