Thank you for all the helpful info you've been providing, Ladymac. I am also taking the Zantac an hour before the tecfidera/meals. I actually didn't expect it to work, since my understanding is that the Tecfidera is producing the extra troubling acid, not my stomach. Maybe reducing my stomach acid just takes the edge off? I may very well have this all wrong! Either way, I'm definitely going to try to drop Zantac as soon as I can! Good luck with dropping your evening Prevacid.
FYI- I tried a couple of other things so far to try to replace Zantac. Rolaids helped a tiny bit, but I still got sick. I also tried baking soda water, which also helped a little bit, but it's gross. I think Zantac along with Ladymac's diet plan, complete with GERD-friendly food, is what's working best for me. I have stopped using the aspirin, because my neuro wasn't a fan, and the only difference I really notice is that I have more flushing now. I guess everyone just needs to try different things to see what works, and remember keep your doctor in the loop!