I was diagnoised with hyperthyroidism – about 6 months ago. I had been suffering with heartburn for about two years until being diagonised with graves disease. A couple of weeks into taking tapezole my Heartburn was gone. I stopped taking tapezole after two months ( hormone levels came back to normal) due to hives (side effect of tapezole) and started on a homeopatic regimen. Guess what – my T3 and T4 were higher than the first diagnosis and my heartburn was coming back. Started back on tapezole, this time on a lower dosage. Heartburn gone again. I think I am getting hypothyroid or nearing there. I am having minor heartburn problems again. As usual my doctor dismissed any relation between hyperthyroid and heartburn.