Antibiotic therapy for pelvic inflammatory disease
This review (39 RCTs; n=6894) concludes there is uncertainty over whether one treatment is safer or more effective than another. Based on one study (low risk of bias) a macrolide (azithromycin) probably improves cure rate vs. tetracycline (doxycycline) in mild-moderate disease.
Source:
Cochrane Database of Systematic Reviews