Penicillin, Cephalexin: itching/ rash.  Metronidazole: PO- abdominal cramps &amp; diarrhea. Vaginal- burning.  Macrobid: abdominal cramps &amp; diarrhea.  Phenergan, Reglan, Compazine, Haldol: lockjaw &amp; uncontrollable movements.  Morphine: itching. Hydrocodone: abdominal cramps &amp; vomiting.