I'm Korean and I'v been using Pepcid Ac Max strength every time I drink and it does help! BUT, sometimes I have to double cross my fingers that it will. I normally take 2 (40mg) of them and I HAVE to wait an hour. Sometimes if I wait too long, like an hour and 30 minutes to drink, I'll get red. Im not sure why. Anyone have an explanation? I understand that you have to wait for it to kick in, but sometimes I'll wait an hour, Ill be good to go. But other times, I'll wait an hour and its like i never took it. I really don't have an understanding of it because im waiting more than that one hour needed to kick in. Does this happen to anyone else?