I went to planned parenthood for my abortion pill and the doctor also prescribed azithromycin and metronidazole i'm not sure why. is this common?

Genital infection?: Your doctor thought you have an infection. These antibiotics are commonly used to treat vaginal or genital infections, including STDs (especially chlamydia and trichomonas), and for bacterial vaginosis, an overgrowth of vaginal bacteria. Or perhaps the antibiotics were intended to prevent an infection as a complication of the abortion procedure. You'll need to ask the doctor.