Can anyone help. My GP knows of underactive thyroid and the medication for it but hasn't carried out any of the blood tests I see mentioned on this site and nor does she seem to connect any of my symptoms I suffer with my thyroid problem. I've been having terrible acid / heartburn in my stomach, chest and throat. The doc treated me with omiprazol which is an antacid for acid reflux but from searching the internet the more likely cause is lack of stomach acid which is common with an underactive thyroid which also is what appears to be causing my recent food intolerances. The discomfort on a night from not being able to sleep lying down and the sleep deprevation is getting me down. Can anyone tell me what medication I should be asking her to prescribe me?