Do NOT use Vicodin if:
you are allergic to any ingredient in Vicodin or any other codeine- or morphine-related medicine (eg, codeine, oxycodone)
you have diarrhea associated with poisoning, antibiotic use, or a bacterial infection (from eating or drinking contaminated food or water)
you are taking sodium oxybate (GHB)
Contact your doctor or health care provider right away if any of these apply to you.