Eric's right oxy - empty stomach could definitely cause nausea small sips an oxy more small sips... And I hear him on the taste smell etc... That's why bland almost flavorless might be better - vanilla something - etc... I can tell you that during recovery anything that was processed tasted horrible!!! it was the chemicals - even now. Natural food tastes best pop is still gross for me. But what I said was also true about retraining his stomach. Good luck!