Antihistamine H2 Blocker

Hello, I’m from Belgium and I’m searching for Antihistamine H2 blockers to mask my alcohol flush syndrome when going out for drinks. After some research I’ve found out that H2 blockers are supposed to help with that, like famotidine (pepcid AC). Only problem is I’m not able to find any H2 blockers here and I’m not able to buy it off Amazon. Is there any way for me to get my hands on some H2 blockers, or other remedies for alcohol flush syndrome? Please let me know