<prompt> The following statements regarding finasteride are true EXCEPT:It is used in the treatment of benign prostatic hyperplasiaImpotence is well documented alter its useIt blocks the conversion of dihydrolestosteron to testosteroneIt is a 5 a reductase inhibitor  <response>: Finasteride is a competitive inhibitor of enzyme 5 alpha-reductase which conves testosterone into DHT. DHT is a more powerful androgen than testosterone It is used for the treatment of BPH and androgenic alopecia Adverse effect-cause impotence.Ref.Essentials of medical pharmacology TD Tripathi 7th edition page no.302 