Having h2s burps (egg smell). no vomit or loose stools. third time in 3 wk. poss pregabalin cause? other cause? will charcoal tablets help?

Could be normal: Foul belching that smells like that could be a normal variant or related to your diet. However, there are conditions that can cause this. A gastric beazor (collection of food particles in the stomach) or gastroparesis can produce this problem. You should see your primary care doctor or a gastroenterologist to look into these possibilities.

Try this: pregabalin is not likely the cause. Charcoal will not help – by the time it is in your bowels, it will be saturated with gases from above - stomach etc. try vegetables/fiber. Avoid milk. Avoid anything you might be allergic to. Buy good probiotics. Good luck