Welcome

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.

Read our FDA Citizen Petition to remove finasteride from the market.

Adverse drug reaction reports worldwide

Adverse drug reaction reports worldwide

PFS research studies published

PFS research studies published

Known suicides worldwide

Known suicides worldwide

Doctors & researchers speaking out

Doctors & researchers speaking out

Nations warning of PFS

Nations warning of PFS

National media reports worldwide

National media reports worldwide

Sources

Patient Services

Connect with other PFS patients

Consult knowledgeable doctors

Report your side effects

Read the latest research

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 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

Michael S. Irwig, MD, Attending Endocrinologist
Beth Israel Deaconess Medical Center

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

Abdulmaged M. Traish, PhD, Professor of Biochemistry and Urology
Boston University School of Medicine

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

Doris Mannhard, MD, Urologist
University Hospital Zürich

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

Janet Woodcock, MD, Director of the Center for Drug Evaluation and Research
US Food and Drug Administration

PFS Foundation Web Traffic Up 33% Year Over Year

SOMERSET, N.J., Jan. 5, 2016 – Traffic to the PFS Foundation website rose 33.6 percent in 2015, compared to 2014, according to Google Analytics. Concurrently, users in 161 countries—or 82.5 percent of the world (as defined by the 195 nations recognized by the U.S. Department of State)—accessed information on the condition via PFSFoundation.org in 2015, […]

Reminder: Report PFS Symptoms to National Pharmacovigilance Authorities

SOMERSET, N.J., Sept. 9, 2015 – The Post-Finasteride Syndrome Foundation is reminding PFS patients to report all persistent side effects to their respective national pharmacovigilance authorities for inclusion in the World Health Organization Progamme for International Drug Monitoring’s VigiBase database for adverse drug reactions (ADRs). Run by Uppsala Monitoring Centre (UMC), which provides scientific leadership […]

Data Available on Adverse Side Effects of 5α-RIs Don’t Conclusively Suggest They’re Safe, Say Researchers at Boston University School of Medicine

SOMERSET, N.J., Sept. 7, 2015 – Data from preclinical and clinical studies have provided substantial evidence that 5α-Reductase inhibitors (5α-RIs) such as finasteride and dutasteride cause loss or reduction of libido, increase the risk of erectile dysfunction and ejaculatory dysfunction, and may contribute to the onset of depression. These agents interfere with the biosynthesis and […]

Suggestion That Sexual Side Effects Appear Early in Finasteride Therapy then Return to Normal is ‘Inaccurate,’ Say Researchers at Boston University School of Medicine

SOMERSET, N.J., Aug. 26, 2015 – Twenty-five percent of men currently taking finasteride or dutasteride (brand names Proscar and Avodart) for the treatment of benign prostate enlargement (BPH), appear not to benefit from taking these medications. Those prescribed Propecia or Avodart for male pattern hair loss are also at risk for adverse events elicited by […]