Praxis Medical Insights

Est. 2024 • Clinical Guidelines Distilled

Made possible by volunteer editors from the University of Calgary & University of Alberta

Last Updated: 9/12/2025

Cephalexin Safety During Pregnancy

Introduction to Cephalexin Use

  • Cephalexin is safe to use during pregnancy as there is moderate quality evidence supporting its use with no demonstrated harm to the fetus, according to the American Academy of Dermatology 1

Clinical Applications and Safety

  • For hidradenitis suppurativa requiring systemic antibiotics during pregnancy, guidelines conditionally recommend cephalexin based on moderate quality evidence of safety from the American Academy of Dermatology 1, 2

Comparison with Other Antibiotics

  • Cephalexin offers a safer alternative to contraindicated antibiotics during pregnancy, such as Doxycycline and Trimethoprim-sulfamethoxazole, which pose risks like congenital anomalies and increased risk of preterm birth, as noted by the American Academy of Dermatology 1