It is best not to consume alcoholic beverages while taking an antibiotic, according to Mayo Clinic. Macrobid is an antibiotic medication that is often prescribed to treat urinary tract infections, according to RxList.
The Mayo Clinic states that antibiotics and alcohol have similar effects on the body. These can include drowsiness, dizziness and upset stomach. When alcohol is consumed while taking Macrobid, these side effects can be intensified. Flushing, vomiting and nausea, and increased heart rate can also result from alcohol consumption. Once the Macrobid prescription is finished and the body's health has significantly improved, it may be safe to consume alcohol again.