Post-finasteride Syndrome: A Review of Current Literature

Abstract

A constellation of persistent adverse effects—collectively termed post-finasteride syndrome (PFS)—after 5α-reductase inhibitor treatment for benign prostatic hyperplasia (BPH) and androgenic alopecia (AGA) has recently been described. The severity of these sexual, physical, neurological, and psychiatric side effects raises important concerns regarding the treatment of these conditions, especially given the prevalence of indications for these medications. Here we review the literature exploring the symptoms, proposed mechanisms, and potential disease modulating factors for PFS. While the persistent sexual side effects associated with PFS are well documented, research on the physical, neurological, and psychiatric adverse effects is much less ubiquitous. Though the mechanisms leading to PFS have been proposed, a clear treatment plan for these patients has not been established. In the treatment of BPH and AGA with 5α-reductase inhibitors, the risks of PFS should be considered. The occurrence of persistent adverse sexual, physical, neurological, and psychiatric side effects after 5α-reductase inhibitor is well supported by the existing data. While additional studies are needed to better evaluate the role of 5α-reductase inhibitors in the manifestation of the symptoms of PFS, the risks of PFS should be critically evaluated when treating patients with BPH or AGA.