This paper is dedicated to the memory of a healthy person who started taking finasteride several years ago, “just” to improve his hair. Within a week, he developed severe neuropsychiatric symptoms that did not abate after stopping the drug. Treatment attempts by the best specialists did not help, and a few months later, he died by suicide. Finasteride, a 5α-reductase inhibitor of testosterone conversion, was approved by the US Food and Drug Administration (FDA) in 1997 for treating androgenetic ...