finasteride

  • Pharmacy Author:
    Omudhome Ogbru, PharmD

    Dr. Ogbru received his Doctorate in Pharmacy from the University of the Pacific School of Pharmacy in 1995. He completed a Pharmacy Practice Residency at the University of Arizona/University Medical Center in 1996. He was a Professor of Pharmacy Practice and a Regional Clerkship Coordinator for the University of the Pacific School of Pharmacy from 1996-99.

  • Medical and Pharmacy Editor: Charles Patrick Davis, MD, PhD
    Charles Patrick Davis, MD, PhD

    Charles Patrick Davis, MD, PhD

    Dr. Charles "Pat" Davis, MD, PhD, is a board certified Emergency Medicine doctor who currently practices as a consultant and staff member for hospitals. He has a PhD in Microbiology (UT at Austin), and the MD (Univ. Texas Medical Branch, Galveston). He is a Clinical Professor (retired) in the Division of Emergency Medicine, UT Health Science Center at San Antonio, and has been the Chief of Emergency Medicine at UT Medical Branch and at UTHSCSA with over 250 publications.

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DRUG INTERACTIONS: Carbamazepine, rifampin, and St. John's wort may reduce blood levels of finasteride by increasing its breakdown in the liver. Itraconazole, erythromycin and similar drugs increase blood levels of finasteride. 

PREGNANCY: Finasteride should not be used or handled by pregnant females. Finasteride prevents the conversion of testosterone to DHT, a hormone which is necessary for the development of male genitalia. Finasteride should not be used or handled by pregnant mothers due to the potential hazard to the male fetus.

NURSING MOTHERS: Finasteride should not be used by women. It is not known if finasteride is excreted in human milk.

SIDE EFFECTS: The most common side effects associated with finasteride are breast enlargement, decreased libido, erectile dysfunction, and ejaculation disorders. Serious side effects include increased risk of high-grade prostate cancer, and increased risk for male breast cancer.

REFERENCE: FDA Prescribing Information

Medically Reviewed by a Doctor on 10/9/2014

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