thank you for your comment. No he is not taking any of those meds. He does not smoke, hates the smell of coffee makes him nauseous. He's attacks actually did start after one day he went out with his friends for drinks he tried this drink that I searched for the ingredients and has five different alcohols. That night he went home to sleep to wake up with sharp pain on the right side of his stomach and vomiting went to the ER and he was told it was alcohol poisoning. After that initial incident he would get the same episodes of pain and vomiting pain got worse the more he vomited. This episodes then after would come out of the blue while at work or when waking up in the morning there's no warning.
Is your brother taking any anti-inflammatory meds...like asprin,motrin, advil. They can tear a hole in the stomach. Also...alcohol, caffeine should be avoided. All of these will cause nausea and vomiting. But I think the Dr. would have already told him this.
It is really frustrating when your symptoms cannot be diagnosed. Hope you can find some answers soon.
angl