The reason I ask is just about every time I've taken a pain medication (Vicodan, Percocet, etc.) I get nauseous and usually vomit many times during the day. I was given morphine recently for a back injury and although it worked wonders on relieving the pain, I was so sick to my stomach and was vomiting for the next 24 hours. I'm still not sure if it was from the meds or if I had contracted a 24 hour bug or what. Is the nausea and vomiting normal or could I be in-tolerant?