My father (Caucasian male, 72 years old, 160 lbs, 6 0 , non-drinker at present, non-smoker, chews tobacco) just had quintuple (5x) by-pass surgery three weeks ago. He is experiencing intermittent nausea and vomiting. He belches often when the nausea onsets and leans forward when feeling worse stating it feels better. When asked he did say he burps more when leaning forward. Any ideas?