I am shocked to hear gaba caused heartburn as I have acid reflux and even supplements will cause horrid symptoms. I am not on a high dose gaba but my side effects are few. Granted I plead the blood of Jesus every time I take a medication that only positive effects will heal and help and negative effects be flushed away.

I had concerns about constipation as it appeared to start but I upped my magnesium, flaxseeds, chlorophyll, vitc, all the items that generally help with that I made sure to continue if not up some of them.

But gaba has stopped working for me, I cant even tell I am taking it now so I am weening myself off it to see if I completely stop if my pain changes while I wait for my next dr app. next week.

There are lots of things I do for my acid reflux though I do not know if they would help you if the medication is causing that strong reaction. I stay on probiotics, Braggs Apple Cider Vinegar & baking soda, chlorophyll and such to keep me alkaline.

good luck!