TLDR Dutasteride and finasteride may reduce sperm count and volume but don't affect movement or shape; effects are reversible after stopping.
A study from 16 years ago found that dutasteride and finasteride, two drugs used for hair loss treatment, can decrease semen volume, sperm concentration, and total sperm count in healthy men, but do not affect sperm motility or morphology. The drugs also lower serum levels of DHT and PSA, but the changes in semen parameters are reversible after stopping the drugs. The study suggests that these drugs should be used with caution in men who desire fertility.View this study on academic.oup.com →
Finasteride doesn't harm bone density in older men with BPH.
Finasteride doesn't harm male fertility or sperm quality, but may slightly reduce ejaculate volume.
Finasteride treats enlarged prostate, improves urinary flow, but may cause sexual side effects.
Finasteride reduces urinary issues and surgery need in men with enlarged prostates by over 50%.
Long-term finasteride use doesn't change bone density or metabolism.
Finasteride effectively treats BPH but may increase sexual dysfunction risk.
Dutasteride did not change rat spermatogenesis or oxidative stress but needs more research.
5α-Reductase inhibitors can negatively affect male sexual function and, in some cases, significantly reduce sperm count, but these effects may be reversible.
Dutasteride and finasteride may reduce sperm count and volume but don't affect movement or shape; effects are reversible after stopping.
Finasteride doesn't affect hormone levels in normal men.