I've been taking pepcid AC for the past 2 years.  Before pepcid AC, I would drink and get red pretty quickly.  However, after a few drinks, I would return to my natural skin color again, does anyone know why this is?  I started taking pepcid AC 2 years ago, and it really helped.  I didn't turn red at all, maybe even a little paler.  I only had to take one pill and I usually took it with my first drink, not having to wait an hour before I drank. However, for the past 2 weeks I am starting to get red again.  Does anyone know why this is? Am I starting to build a tolerance to the pepcid ac?