Finasteride is the name of the drug, Polyjuice is the trade name, the two ingredients are the same, only the name is different, the efficacy is the same. Finasteride is commonly used in the treatment of prostate hyperplasia, is a 5-alpha reductase inhibitor, by inhibiting the conversion of testosterone into the more active dihydrotestosterone to achieve the effect of reducing the size of the prostate, and has the effect of alleviating the symptoms of frequent urination, urinary urgency, urinary incontinence. Its main adverse effects include decreased libido, erectile dysfunction, skin rash and itching. It should be used with caution in patients with hepatic insufficiency and is only used in the treatment of prostatic hyperplasia and is contraindicated in children and women. Specific drugs, please buy and use under the guidance of a physician or pharmacist, not to choose their own application to avoid adverse reactions.