The following site offered this caution, in part. You can visit the site for the complete answer on
food and alcohol, but your doctor would be the best reference.
http://www.drugs.com/drug_interactions.html
"Metoprolol and ethanol may have additive effects in lowering your blood pressure. You may experience headache, dizziness, lightheadedness, fainting, and/or changes in pulse or heart rate.