About this site

This site is published by a former user of finasteride who has lasting, life-changing symptoms since discontinuing finasteride more than five years ago. The purpose of the site is to provide evidence and context on the risks of finasteride as a treatment for hair loss in men 18–40. Multiple perspectives and different types of evidence are considered, from published research to firsthand reports. No one perspective or type of evidence is definitive. All evidence should be viewed carefully and critically in the context of the whole complex affair.

The bibliographies aim for neutral coverage of research on risks of 5-ARIs. (Learn more about the bibliographies)

Reader advisory

Finasteride reduces the availability of an androgen called dihydrotestosterone. Taking the drug can interfere with sexual function, psychological well-being and other aspects of the body and mind. Its adverse effects may be disturbing and considered socially unacceptable to discuss. This site includes research and firsthand reports on topics such as sexual dysfunction, abnormalities of the penis, semen abnormalities and psychological adverse experiences such as depression, anxiety, suicidality and suicide.


This site is concerned with adverse effects of finasteride for hair loss, especially when taken by men ages 18–40. This site is not concerned with the safety profile of finasteride for other indications, such as benign prostatic hyperplasia or prostate cancer prevention, typically taken by men 55 and older.


This site is published independently without any material benefits to me. Please note:

  • I have not participated in litigation concerning adverse effects of 5-ARIs.
  • I am not affiliated with any patient advocacy organization.
  • I am not affiliated with any forum or other website related to finasteride or hair loss.
  • I tweet at @FinasterideInfo.
  • I pay all expenses of managing the site, which does not collect revenue. It is independently published without financial compensation.
  • I have donated funds to support research on adverse effects of finasteride.
  • I have no other interests or conflicts related to this matter to disclose.


finasteride.research [at] fastmail.com or @FinasterideInfo