Hi. Thanks for your query. Noted the history of built up of air in bowel, started with some nausea but now nausea begins 4-5 hours after breakfast, accumulation of gas can lead to vomiting with lots of air from mouth. Takes Ranitidine ,Lozartan Pot., Metoprolol in the morning 30 min apart, also take Glimepiride Januvia Ataravastatin Amlopidine is taken while eating and after. wants to know whether medicines cause this problem. As per the history you have provided, this looks to be aerophagia and the commonest cause is anxiety and/or stress. I would advise you the following: Continue your medicines individually and see if any of these is causing the problems. Try to identify the foods and beverages that instigate or enhance your problems and stop them altogether. Stop aerated drinks, nuts, outside food. Take a PPI like Omeprazole, Domperidone to cover up nausea and vomiting as acts as prokinetic. Antacids every three hours. If no relief, get an upper GI Endoscopy and an opinion of a Gastroenterologist ...