Effects of 5-Alpha Reductase Inhibitors on Erectile Function, Sexual Desire, and Ejaculation

FCE 28260 (PNU 156765), an under-explored 5α-reductase inhibitor, showcases promising results in research by Giudici et al., outperforming well-known treatments like Finasteride in reducing the conversion of testosterone to DHT. Its superior efficacy, demonstrated through lower IC50 values in both natural and human recombinant enzyme studies, suggests it could offer more effective management of DHT-related conditions. Additionally, its lower molecular weight hints at better potential for topical application, potentially offering advantages in treating conditions such as androgenic alopecia. Despite its potential, it has not advanced in development, possibly due to financial limitations, leaving its therapeutic prospects and side effect profile largely unexplored.

Dutasteride and finasteride have similar risks of sexual dysfunction for treating androgenetic alopecia. Users experience varying side effects, indicating individual differences in drug reactions.

Dutasteride takes 1-3 months to affect scalp DHT levels, not just a week. The prostate absorbs Dutasteride faster than the scalp due to different vascular networks and enzyme densities.

Finasteride and dutasteride have potential risks, including post-finasteride syndrome, but are commonly used for hair loss. RU58841, minoxidil, and needling are suggested as alternatives, though all treatments carry risks.

Dutasteride and finasteride may temporarily affect semen quality but are unlikely to cause permanent infertility. The Kim et al. study is criticized for poor methodology, and many prefer hair retention over potential fertility concerns, using treatments like dutasteride, finasteride, and minoxidil.

Dutasteride may reduce bone mineral density, but there's no increased risk of osteoporosis or fractures compared to finasteride. Users suggest resistance training to counter potential bone effects.