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The PFS Foundation’s primary mission is to facilitate research on the characterization, underlying biologic mechanisms, and potential treatments of post-finasteride syndrome (PFS). Other goals include generating public awareness of PFS, providing support for patients suffering from the condition, and lobbying for stricter regulation so that fewer unsuspecting men develop the condition.

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Adverse drug reaction reports worldwide

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Known suicides worldwide

Doctors & researchers speaking out

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Why Is This Hair-loss Drug Still on the Market? German Public TV Asks of Finasteride

Nov. 2, 2022 Dear Friends: Anti-finasteride sentiment continues to run rife on Teutonic TV. Dürfen Die Das? (Can They Do That?), a newsmagazine show on the German public-broadcasting network NDR, last week debuted a 17-minute film titled Finasteride: Why Is This Hair-loss Drug Still on the Market? (English-subtitled version here). That marks the fourth German-language […]

Allopregnanolone Counteracts Finasteride-induced Alterations in Gut Microbiota, According to New University of Milano Research

Oct. 29, 2022 Dear Friends: The neurosteroid allopregnanolone (ALLO) has proved effective in counteracting some of the finasteride-induced alterations in gut microbiota, according to new research at the University of Milano (UniMi). Titled Gut Inflammation Induced by Finasteride Withdrawal: Therapeutic Effect of Allopregnanolone in Adult Male Rats, and funded in part by the PFS Foundation, […]

PFS Is ‘Clearly a Problem,’ ‘Warrants Intervention’ and Is ‘Inappropriate to Dismiss,’ Says New USC Research

Sept. 26, 2022 Dear Friends: If you’ve ever Googled “post-finasteride syndrome,” chances are you’ve earned a place in the annals of medicine. Researchers at the University of Southern California’s Keck School of Medicine (KSM) have analyzed worldwide public interest in finasteride’s impact on sexual health and determined that PFS is “clearly a problem…that warrants intervention.” […]

First-ever Suicidality ADRs Added to US Propecia Product Label, per FDA Mandate

Aug. 29, 2022 Dear Friends: Organon & Co., the Merck & Co. spinoff that now owns Propecia (finasteride 1 mg), has added a new adverse drug reaction (ADR) to the hair-loss remedy’s label: suicidality. Earlier this month, Organon updated the Adverse Reactions section of Propecia’s Prescribing Information (PI—aka product label, or package insert) to read: […]

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

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

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

Mohit Khera, MD, Director, Laboratory for Andrology Research
Baylor College of Medicine

[PFS] is clearly a problem that is important to the general public.

Much of the medical community has yet to recognize [PFS] as a real clinical entity. Our… analysis indicates that, nonetheless, [PFS] is clearly a problem that is important to the general public that warrants intervention. Thus, it is inappropriate to dismiss this condition.

Global online interest in finasteride sexual side effects, International Journal of Impotence Research: September 13, 2022

Kian Asanad, MD, Chief Resident Physician in Urologic Surgery
Keck School of Medicine of the University of Southern California

Seems that almost half of urologists instruct their patients to stop finasteride!

It’s Monday, which means it’s time for a poll! In evaluating fertility, how do you counsel men taking finasteride for hair loss?… Results are up! Seems that almost half of urologists instruct their patients to stop finasteride!

● Stop finasteride: 45.6%
● OK to keep taking: 17.5%
● It depends: 36.8%

Society for the Study of Male Reproduction (via Twitter): October 11, 2022

James Smith, MD, President
SSMR for the American Urological Association

Mother of Patient

He was a happy, easy going, kind and caring teenager and Propecia has made him mentally disabled.

My son, 31, had a mild form of BDD and was worried about his hair thinning and took Propecia in 2013. He was taking it for 4 years during which his personality changed beyond recognition and I suspect he developed PFS. He experienced severe side effects: insomnia, loss of libido, obsessive thoughts, anxiety, depression and suicidal ideation. These deteriorated since he stopped taking Propecia in 2017. He was no longer able to go to work, lost the ability to sleep well, was unable to care for his 2 daughters and is feeling increasingly suicidal. He had to go to the emergency department twice this year and now is in a mental hospital in New York. Vulnerable young people should not be prescribed Propecia so easily and drug producers should provide a clear warning about such dangerous side effects. I believe Propecia ruined his health, career and life. He was a happy, easy going, kind and caring teenager and Propecia has made him mentally disabled. I’m very upset and do not know what to do.

GL, 62, Oxford, England: Aug. 3, 2018

Condition update: September 2020

No improvement

Mother of Patient

He’d been using topical medications for 5 years and decided to try Finesteride. That was the beginning of a nightmare.

My son was a healthy, smart ambitious 28-year-old man who was going back to school at Suffolk University with a 4.0. He also worked and was in fantastic health, climbing mt Washington in 4 hours for fun. He was, however, battling losing his hair. He’d been using topical medications for 5 years and decided to try Finesteride. That was the beginning of a nightmare. His sister was getting married Alugust 18th. 4 days before the wedding it started…muscle spasms, nonstop and severe anxiety. He had only been on it for 3 months. He immediately stopped taking it but it has continued for the last 5 months. Now though, he is in pain. He has been seeing a neurologist, and is convinced he must have ALS, although so far the tests do not point to that. He started seeing a therapist also hoping it was stress. But the pain and twitching and insomnia are real. He does not currently have any erectile issues thankfully but the physical and mental stress he experiences is horrible. He continues to search foir answers but i am convinced it is from the Finesteride.

LM, Lowell, MA: Jan. 6, 2019

Condition update: August 2020

Slightly worse

PFS Patient (male)

I am living now for seven years with my parents in their tiny apartment and do not know what to do.

I am 35 years old and have this Syndrome since I have been 24 years old. My Life was smashed and destroyed after I started with Finasteride. I can’t stop thinking about this one moment I decided to go to this special Doctor who treats hairloss. I was 24 years young and I had full beautiful hair. This Doctor made some tests and scared the shit out of me my prognosing a full bald me in a few years. I trusted him and took the pills he gave me. Safe pills he said. No side-effects. Soon after I started the pills my life made a u-turn. I was finishing university and had already found a new job in a new city. That’s when I start to enter hell. I lost my mind and had the most disgusting mental health issues. I had to go to the hospital and started with suicide thoughts. It was an absolute nightmare! Fast Forward. I am living now for seven years with my parents in their tiny apartment and do not know what to do. I feel a bit better because I take a lot of different medications but I can not go outside or even read a book because I feel sedated. I really do not know what to do with my life.

HH, 35, Stuttgart, Germany: Feb. 3, 2019

Condition update: September 2020

No improvement