Avodart (Dutasteride) 0.5 mg is a prescription medication used primarily for the treatment of benign prostatic hyperplasia (BPH) in men. BPH is a non-cancerous enlargement of the prostate gland, which can cause urinary problems, such as difficulty starting urination, weak urine flow, and frequent urination at night. Avodart helps to shrink the enlarged prostate by blocking the conversion of testosterone to dihydrotestosterone (DHT), a hormone that plays a key role in prostate growth.