Impact of 5-Alpha Reductase Inhibitors on Male Reproductive Health: A Review of Finasteride and Dutasteride

5-alpha reductase inhibitors, such as finasteride and dutasteride, are effective treatments for androgenic alopecia by increasing hair density through the reduction of dihydrotestosterone levels. However, this review highlights concerns about their impact on male reproductive health, particularly in men of reproductive age. Studies show these inhibitors can reduce sperm count, concentration, and motility, and cause hormonal changes, including increased testosterone levels. Sexual dysfunction, such as decreased libido and erectile dysfunction, may persist even after discontinuation. Mechanistic studies in rodents suggest these effects may be due to changes in gene expression related to spermatogenesis and penile tissue function. While effective for hair loss, these drugs may adversely affect reproductive health, especially with the use of combination therapies, necessitating further research to understand these risks better.