Above, Dr. Jerry Shapiro explains how finasteride works to block DHT and prevent hair loss.

Finasteride 1mg is an FDA-approved prescription tablet used to treat male pattern baldness in men only. (What we’re saying is that this medicine is not for use by women.)

Though rare, in clinical trials, 3.8% of male patients noticed some form of sexual side effects (versus 2.1% of patients using the placebo), including less desire for sex, difficulty in achieving an erection, or a decrease in the amount of semen released during sex. This may continue after stopping treatment. Of course, you should contact your doctor if you have additional questions about side effects. You may also report side effects to the FDA at 1-800-FDA-1088.

Learn more: Finasteride vs. Minoxidil: What’s Right for Me?

The information provided in this article is not a substitute for professional medical advice, diagnosis, or treatment. You should not rely upon the content provided in this article for specific medical advice. If you have any questions or concerns, please talk to your doctor.

If you’re experiencing a mental health crisis, please call 911 or go to your nearest emergency department. If you are contemplating suicide, call 911 or call/text the National Suicide and Crisis Lifeline at 988. These services are available 24/7.

If you would like to learn more about finasteride, please see the full prescription information here. You are encouraged to report negative side effects of prescription drugs to the FDA. Visit MedWatch: https://www.fda.gov/Safety/MedWatch/default.htm   or call 1-800-FDA-1088