Caffeine plus alcohol equals a dangerous mix. theolympian.November 24, 2009.Under pressure from state attorneys general, the federal Food and Drug Administration has announced plans to crack down on 30 manufacturers of caffeinated alcoholic beverages.Dr. Joshua Sharfstein, principal deputy commissioner of food and drugs, said it’s time for the FDA to look into the safety and legality of the products and pull them from the marketplace if they don’t meet federal standard. [ See ] See also in examiner: Caffeinated alcohol companies fire back at the FDA