Effects of Finasteride, a 5 Alpha-Reductase Inhibitor, on Circulating Androgens and Gonadotropin Secretion in Hirsute Women

The conversation discusses the use of 5-alpha-reductase inhibitors like finasteride and dutasteride for hair loss in transgender women, particularly in relation to testosterone suppression. The original poster has been using dutasteride and is considering stopping it due to undetectable testosterone levels.

Finasteride not only inactivates the 5a reductase enzyme but also affects the 5b reductase enzyme in a dose-dependent manner, which can impact sexual behavior and brain activity. The user experienced significant hair regrowth and side effects on 1mg of finasteride, which diminished after reducing the dose to 0.5mg, leading to no side effects and further hair improvement.

The release of a study on 5a-reductase inhibitors (finasteride and dutasteride) which showed an increased risk of depression, dementia, decreased libido, and reduced semen load as potential side effects; discussion around other forms of hair loss treatments such as topical minoxidil, RU58841, or opting to accept baldness; and advice to consider professional help for deeper issues related to hair loss.

The conversation discusses the effectiveness of anti-androgens for hair loss, with a preference for topical treatments like RU58841 over oral options due to better scalp concentration and fewer side effects. Topical finasteride at 0.1% may provide some results, especially when combined with a topical androgen receptor antagonist like RU58841.

A 20-year-old female is using finasteride 5mg and spironolactone 100mg for severe hirsutism and is experiencing minor side effects like water weight loss and irregular periods. She is concerned about potential future side effects and hair regrowth on her scalp.

A 30-year-old man experienced significant hair regrowth and improved libido after using finasteride and dutasteride for androgenetic alopecia, with no adverse effects. He plans to reduce dutasteride dosage when trying to conceive and has been using topical minoxidil since 2015.