Patient: Could taking diet pills containing caffeine anhydrous have side effects when drinking alcohol
Doctor: Thank you for writing to us.Caffeine only does not have any problem. But I think that the medication you are taking may have some other substances. These can cause combined effects with the alcohol and cause some liver or other organ damage.But taking coffee alone is fine. This is because there are many alcohol drinks which have coffee like irish coffee.Hope this helps you. All the best.