Post-finasteride syndrome [is] a disorder not traditionally widely recognized by the medical community. Still, it has more recently gained recognition in mainstream society.

Medical management of [androgenic alopecia] and [BPH] with finasteride or dutasteride…has been generally successful and well tolerated; however, the influx of reported adverse effects has warranted further exploration of this emerging clinical problem. This dilemma in question, coined post-finasteride syndrome (PFS), is characterized as a compilation of sexual, psychological, and physical adverse effects that emerge with finasteride or dutasteride usage and persist even after medication withdrawal. The limited research on PFS is conflicting and inconclusive, further emphasizing the need for direct investigation and elucidation of any associations.

—Textbook of Rare Sexual Medicine Conditions: Springer Nature, May 2022