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Does Propecia Cause Infertility?

Q: I’ve heard that FDA added a description of reports of male infertility to the side effect labels of both Propecia and Proscar (finasteride). Is this a likely side effect in your experience? — S.S., Rolling Hills, California

A: Propecia (finasteride 1mg) may, uncommonly, lead to male infertility by changing the consistency of the male ejaculate as well as decreasing the sperm count.

Ejaculate is a combination of sperm produced by the testes and a viscous fluid made by the prostate. Since finasteride shrinks the prostate it make the ejaculate less viscous (more watery).

Most patients taking Propecia and trying to conceive have no issues.

If one is trying to conceive for 4-6 months and having difficulty, then it is reasonable to stop taking Propecia.

It is important to know that taking Propecia while trying to conceive will not lead to congenital deformities or issues with the fetus as long as the women does not come in direct contact with the medication.

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