The Post-Finasteride Syndrome Foundation’s primary mission is to fund 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.
Adverse drug reaction reports worldwide
PFS research studies published
Known suicides worldwide
Doctors & researchers speaking out
Nations warning of PFS
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 the age of 40 who use finasteride for alopecia are at risk for suicide if they develop persistent sexual adverse effects and insomnia.
—Finasteride and Suicide: A Postmarketing Case Series: Dermatology, January 14, 2020
Even if the incidence of persistent sexual adverse events is 3% to 5%… approximately 900,000 to 1.5 million men would suffer persistent sexual and psychiatric adverse events.
[A]pproximately 30 million young men, worldwide, would be prescribed finasteride or dutasteride to treat male pattern hair loss. Even if the incidence of persistent sexual adverse events is 3% to 5%, which may be viewed as a small number, approximately 900,000 to 1.5 million men would suffer persistent sexual and psychiatric adverse events. By no means this would be considered a small number and should not be dismissed or ignored.
—Post-finasteride syndrome: a surmountable challenge for clinicians: Fertility and Sterility, January 2020
We wouldn’t recommend that any man take [finasteride], especially not young men.
We are certainly very cautious, because we see the side effects. We wouldn’t recommend that any man take [finasteride], especially not young men. The longer they take it, the greater the risk of experiencing persistent side effects, including after they’ve stopped.
—Do Anti-Baldness Remedies Make You Impotent? Puls, SRF-TV, May 7, 2018
FDA is concerned that use of finasteride by pediatric patients may pose long-term safety risks.
Finasteride inhibits Type II 5(alpha)-reductase, which metabolizes testosterone to the potent androgen 5(alpha)-dihydrotestosterone. FDA is concerned that use of finasteride by pediatric patients may pose long-term safety risks regarding growth, development and sexual function.
—FDA response to Merck & Co.’s citizen petition requesting that finasteride be added to the List of Approved Drugs for Which Additional Pediatric Information May Produce Health Benefits in the Pediatric Population: May 2000
July 28, 2018 Dear Friends: Canada has taken an important first step toward keeping its citizens apprised of finasteride’s many potentially serious and persistent side effects. In the June edition of its Health Product InfoWatch, Health Canada (Canada’s version of the US Food and Drug Administration) reported that “New information regarding the risk of muscle-related […]
July 15, 2017 Dear Friends: On July 4, the Korean Ministry of Food and Drug Safety (MFDS) announced it will revise the warning label on Propecia and its generic versions to include depression and suicidal ideation. The move by South Korea’s equivalent of the US Food and Drug Administration came just six weeks after the […]
SOMERSET, N.J., April 18, 2017 – Post-finasteride syndrome (PFS) patients suffer from altered levels of critical brain-function regulators, including neuroactive steroids, according to a new clinical study published in The Journal of Steroid Biochemistry and Molecular Biology. Titled Neuroactive Steroid Levels and Psychiatric and Andrological Features in Post-Finasteride Patients, the three-year study also uncovered evidence […]
May 26, 2017 Dear Friends: The UK’s equivalent of the US Food and Drug Administration, the Medicines and Healthcare Products Regulatory Agency (MHRA), has issued a drug safety update on finasteride. The May 24 document, titled Finasteride: rare reports of depression and suicidal thoughts, states: Some men have reported episodes of depressive illness in association with […]
SOMERSET, N.J., March 9, 2017 – More than one percent of young men who took finasteride for 206 days or longer developed persistent erectile dysfunction (PED) that lasted an average of 4.2 years after drug discontinuation, according to a new study published today in PeerJ. In all, researchers examined the electronic medical records (EMR) of […]