Finasteride is a medication primarily used to treat hair loss in men, specifically male pattern baldness. It works by blocking the conversion of testosterone to dihydrotestosterone (DHT), a hormone that contributes to hair thinning. By reducing DHT levels, finasteride can help promote hair regrowth and prevent further hair loss. In addition to its use for hair loss, finasteride is also prescribed for benign prostatic hyperplasia (BPH), a condition that causes an enlarged prostate. By decreasing the size of the prostate, finasteride can help alleviate symptoms such as difficulty urinating. Always consult a healthcare professional before starting any medication.