33 - finasteride mcqs

Q: all  the following statements about finasteride are true except ?

a. it is used in the medical treatment of benign prostatic hypertrophy

b. impotence is well documented after its use

c. it blocks the conversion of dihydrotestosterone to testosterone

d. it is a 5 alpha reductase inhibitor

answer: c . it blocks the conversion of testosterone to dihydrotestosterone but not the reverse . 

such a tricky question , i wonder what the examiners think , that we are geniuses or wat ? anyway more info about finasteride here .

 Finasteride (marketed as Proscar, Propecia, Fincar, Finpecia, Finax, Finast, Finara, Finalo, Prosteride, Gefina, Appecia,Finasterid IVAX, Finasterid Alternova) is a synthetic antiandrogen which acts by inhibiting type II 5-alpha reductase, the enzyme that converts testosterone to dihydrotestosterone (DHT). It is used as a treatment in benign prostatic hyperplasia (BPH) in low doses, andprostate cancer in higher doses. A May, 2008 study indicates that Finasteride reduces the rate of prostate cancer by 30% . It is also indicated for use in combination with doxazosin therapy to reduce the risk for symptomatic progression of BPH. Additionally, it is registered in many countries for androgenetic alopecia (male-pattern baldness).

Finasteride was approved initially in 1992 as Proscar, a treatment for prostate enlargement, but the sponsor had studied 1 mg of finasteride and demonstrated hair growth in male pattern hair loss. On December 22, 1997, the U.S. Food and Drug Administrationapproved finasteride to treat male pattern hair loss.