Will pepcid (famotidine) ac help with "asian glow" (turning bright red after drinking alcohol)?

Yes, but...: Some antihistamines can block the vasodilation in the skin that causes flushing from alcohol, which is proximally caused by build up of acetaldehyde. There remains some controversy over whether this is a safe approach in the long run and doing this frequently could increase your risk of alcoholism or ulcers, cancer. http://www.teawithmd.com/2014/12/the-truth-about-alcohol-flushing-or-asian-glow/