In addition to what LivinginHope said first and then I wanted to add I was on
Zantac 150 for about 4 months and I had no
side effects at all. I have a benign arrhythmia (PACS) and so it depends on the person and if you take it long term. I have to go back on it again. But my doctor said not to stay on it all the time. Rather, to stay on it for a while then go off and on. But, I would definitely report this to your doc.