Complications

Depending on the cause, complications of alcohol intolerance or other reactions to alcoholic beverages can include:

• Migraines. Drinking alcohol can trigger migraines in some people, possibly as a result of histamines contained in some alcoholic beverages. Your immune system also releases histamines during an allergic reaction.
• A severe allergic reaction. In rare instances, an allergic reaction can be life-threatening (anaphylactic reaction) and require emergency treatment.