Biotransformation of Tirilazad in Humans: Effect of Finasteride on Tirilazad Clearance and Reduced Metabolite Formation

Finasteride can increase total testosterone and potentially raise estrogen levels, leading to side effects. Biotin in combined tablets can falsely elevate thyroid hormone levels in blood tests.

Pyrilutamide is believed to be more effective than RU58841 and 1 mg finasteride in treating hair loss, with no systemic hormonal effects and the potential to block more than 31% of scalp DHT. It may also antagonize scalp testosterone due to its action as an androgen receptor antagonist.

Finasteride has no effect on the user's estradiol levels, and body fat may influence aromatization. The user is on testosterone replacement therapy and uses everyday injections to manage high RBC count, with plans to measure DHT, DHEA-S, and pregnenolone levels.

The user experienced a significant drop in libido and erectile issues after increasing their finasteride dosage, combining oral and topical treatments. They plan to take a break and resume using a lower concentration of topical finasteride to manage side effects.

A peptide-based delivery system for finasteride shows promise in reducing systemic side effects while maintaining hair growth effectiveness. Combining this with other treatments like minoxidil and RU58841 could enhance results with lower systemic absorption.

Finasteride can affect sperm quality, but fertility usually returns after stopping it, as shown by a user who conceived four months after discontinuation. Some users successfully conceive while on finasteride, though some prefer to pause its use to minimize risks.