What s the best OTC drug for poison Ivy? It has been in contact since Wed. Already went to the doctor and got steroid shot. He prescribed Benadryl and Prednisone pills. benadryl gel, extra strength did t help also use Ivarest, extra strength still not doing well... less than 24 hrs applied Betamethasone Dipropionate... only ease lil bit itch then itch really bad again! all over hands, fingers, balls, face(cheeks, eyelids), forehead and back of neck(like maze redness). Please help!