You could be reading the full-text of this article now if you...

If you have access to this article through your institution,
you can view this article in

Methotrexate: The Pharmacology Behind Medical Treatment for Ectopic Pregnancy


Clinical Obstetrics & Gynecology:
doi: 10.1097/GRF.0b013e3182510a35
Ectopic Pregnancy

Previously established as a chemotherapeutic agent for decades, methotrexate has been adapted for use as a medical therapy for unruptured ectopic pregnancies. Its mechanism of action, competitive inhibition of folate-dependent steps in nucleic acid synthesis, effectively kills the rapidly dividing ectopic trophoblast. However, the same action on normal cells is the basis for many of its adverse effects.

Author Information

Department of Obstetrics & Gynecology, Northwestern University, Feinberg School of Medicine, Chicago, Illinois

The author declares that there is nothing to disclose.

Correspondence: Catherine S. Stika, MD, Northwestern Medical Faculty Foundation, 680 North Lake Shore Drive, #1015, Chicago, IL. E-mail:

© 2012 Lippincott Williams & Wilkins, Inc.