I am juststarting to take dutasteride. I think my stomach is hurting more than usual, my head little more woozy, and more fatigued than usual, and more nauseous. i take anti fungal creme, ketoconazole, and I see that can cause problems. Is that true, , and so can nefazdone. I don t take nefazodone, but I do take trazodone, can that create problems?