I started out with a sore throat, headache,, gas, nausea, back pain upper right side.I thought that I had a severe sore throat. The Dr. prescribed antibiotics(cefuroxime). I felt worse(stomach) and stopped the medication. I had acid reflux problems three years ago and was on medication,so the Dr. thought it might be acid reflux..He prescribed Nexium(once a day) and Ranitidine (twice a day). I have been on this medication for a week. I still have bloating and gas attacks with some back pain. I do not associate any of the attacks with eating. In fact sometimes the attacks have occured on an empty stomach. I have a bad taste in my mouth and my throat and chest do feel like they felt when I had reflux problems, but I never had these stomach and gas issues. I have been eating yogurt for digestive health. I am not overweight and I eat fairly healthy (no fast foods or fried). I was very regular, but it has changed a little since the medication to a little constipation, so I have added more fiber. I also had a colonoscopy 5 years ago and there were no issues. I have not felt well for three weeks. Any ideas?