My Girlfriend Is Taking Antibiotics For A UTI Infection. Her

My girlfriend is taking antibiotics for a UTI infection. Her last dose will be on Thursday night. We were planning on going to a large music festival with a bunch of our college friends for springbreak. We were going to take mdma and go to the event, but now she will be on her antibiotics and I care about her health. The antibiotic is called nitrofurantoin mono.