Hydrocortisonehydrocortisone will decrease the degree or effectation of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 kcalorie burning. Griseofulvingriseofulvin will reduce the degree or effect of sildenafil by influencing hepatic/intestinal enzyme CYP3A4 metabolism. Dexamethasonedexamethasone will reduce steadily the degree or effect of