TLDR Finasteride may cause weak ejaculation and reduced semen volume.
A case report study found that an adult man experienced weak ejaculation and reduced semen volume while receiving low-dose finasteride for androgenic alopecia. The duration of treatment and outcomes were not stated. The author commented that one patient complained of these side effects while taking finasteride.
1 citations,
September 2013 in “Fertility and Sterility” Finasteride discontinuation increases sperm count in men.
Propecia users with Androgenic Alopecia experienced a lower quality of life and more serious side effects compared to those using Minoxidil.
July 2017 in “Reactions Weekly” Finasteride may cause serious muscle-related side effects.
September 2023 in “Cureus” Topical finasteride might be a good alternative for hair loss treatment with fewer side effects, but more research is needed.
4 citations,
November 2001 in “PubMed” 1 mg/day oral finasteride significantly improves hair growth in men with male pattern baldness.
2 citations,
October 2017 in “Drug safety - case reports” Finasteride for hair loss may cause painless bleeding in urine and semen.