Finasteride can be taken again after stopping the drug. Finasteride is now one of the most commonly used drugs for the treatment of prostate enlargement, mainly to solve the factors of mechanical obstruction of prostate enlargement, belonging to the 5 alpha-reductase inhibitor, can inhibit the 5 alpha-reductase enzyme, so that testosterone can not be converted into dihydrotestosterone, and inhibit the increase in the size of the prostate gland can be made to reduce the size of the prostate gland. To treat prostate hyperplasia, theoretically the drug takes longer to work, it has to be taken for at least 1-3 months before it works, and it needs to be taken for a long time, and it is easy to relapse after stopping the drug. However, the drug can continue to take after stopping the drug, because there is no problem of drug resistance, if the drug is stopped for a long time to work again, it may take a longer time.