<prompt> In the management of symptomatic Benign Prostatic Hyperplasia with finasteride the period of trial required for determining a satisfactory response is1 month2 months4 months6 months  <response>: Finasteride is 5-alpha reductase inhibitor which inhibits conversion of testosterone to dihydrotestosterone. It is effective in palpably enlarged prostate50g. 5mg is used daily for at least 6 months for satisfactory response. It has fewer side effects. It is contraindicated in obstructive uropathy or carcinoma prostate.Reference : page 1047 SRB;s manual of surgery 5th edition and page 1350 Bailey and Love;s sho practice of surgery 25th edition 