Welcome
The Post-Finasteride Syndrome Foundation’s primary mission is to facilitate research on the characterization, underlying biologic mechanisms, and treatments of post-finasteride syndrome (PFS). Other goals include generating public awareness of PFS and providing support for patients suffering from the condition.
Read our lawsuit compelling the FDA to act on our Citizen Petition.
Read our FDA Citizen Petition to remove finasteride from the market.
Read all unsealed documents in the US Propecia litigation.
Adverse drug reaction reports worldwide
PFS research studies published
Known suicides worldwide
Doctors & researchers speaking out
Nations warning of PFS
National media reports worldwide
Patient Services
Penile Vascular Abnormalities Found in Majority of PFS Patients in Baylor College of Medicine Study
April 28, 2020 Dear Friends: In a newly published prospective case-control study in Translational Andrology and Urology, Mohit Khera, Director of the Laboratory for Andrology Research at Baylor College of Medicine, and his research team report the presence of vascular abnormalities in the penis of PFS patients (median age of 38) who previously discontinued the […]
Wall Street Journal Letter to Editor Addresses Telemeds’ Easy Access to Finasteride
March 11, 2020 Dear Friends: On February 21, The Wall Street Journal ran a 1,280-word story headlined Losing Your Hair? Why This Solution Is No Longer Shameful, which went, in part, like this: [In 1991]…effective methods like Rogaine or hair plugs were discussed in hushed tones. A… TV ad didn’t mention hair loss, hawking instead […]
Young Men Who Use Finasteride for Hair Loss ‘Are at Risk for Suicide if They Develop Persistent Sexual Adverse Effects and Insomnia,’ Says New Research
February 20, 2020 Dear Friends: “Clinicians should be aware that men under the age of 40 who use finasteride for alopecia are at risk for suicide if they develop persistent sexual adverse effects and insomnia.” That, according to new research by Michael S. Irwig, MD, attending endocrinologist at Beth Israel Deaconess Medical Center in Boston, […]
France’s FDA-Equivalent Issues Information Point and Fact Sheet on Finasteride Adverse Effects
December 19, 2019 Dear Friends: France’s FDA-equivalent agency last week issued an Information Point and fact sheet for men currently taking finasteride for hair loss, or for those considering taking the drug for hair loss. “Developed in conjunction with concerned patient associations and health professionals, this fact sheet aims to reinforce patient information on the […]
New Chinese-Language Website Ups Our Potential Readership by 1+ Billion
October 21, 2019 Dear Friends: PFS awareness took an enormous leap forward today—over the Great Wall and into the Sleeping Giant. At the stroke of midnight, we unveiled a Mandarin Chinese version of our website so that speakers of the world’s second most popular language can learn all about the condition (known to them as […]
Doctors & Researchers Speaking Out
Men under the age of 40 who use finasteride for alopecia are at risk for suicide if they develop persistent sexual adverse effects and insomnia.

An important pattern of symptoms was common among all cases who committed suicide in the setting of finasteride use: insomnia and persistent sexual dysfunction after medication discontinuation. Insomnia and fatigue/tiredness were some of the most debilitating symptoms… Men under 40 years of age who use finasteride for alopecia are at risk of suicide if they develop persistent sexual adverse effects and insomnia.
—Finasteride and Suicide: A Postmarketing Case Series: Dermatology, January 14, 2020
Two subjects—eight percent—committed suicide during or after the study.

While the sexual side effects of 5ARIs are well known, there may be persistent genitourinary, physical, psycho-cognitive, anti-androgenic and penile vascular changes after 5ARI discontinuation. Use of 5ARIs for treatment of AGA may lead to persistent sexual, genitourinary, physical, psycho-cognitive, and anti-androgenic sequelae even after cessation of 5ARI therapy… Two subjects (8%) committed suicide during or after the study.
—Penile vascular abnormalities in young men with persistent side effects after finasteride use for the treatment of androgenic alopecia: Translational Andrology and Urology, April 2020
Health care professionals should…conduct a full evaluation and a…risk-benefit assessment for patients before each prescription of finasteride.

As prescribers, our primary duty is to do no harm. Health care professionals should keep themselves abreast of these potential signals and, accordingly, conduct a full evaluation and a detailed, personalized risk-benefit assessment for patients before each prescription of finasteride.
—Ongoing Concerns Regarding Finasteride for the Treatment of Male-Pattern Androgenetic Alopecia: JAMA Dermatology, November 2020
This drug for young men must be taken off the market.

As of 2018, 15,000 cases of adverse reactions to finasteride were reported to the WHO—which is a huge number to begin with. And the interesting thing is that the average age of this group was 32 to 34 years old… This drug for young men must be taken off the market.
—Documentary on German network NDR titled Side Effects of Finasteride Are Underestimated: January 25, 2021