Effect of Finasteride, a 5 Alpha-Reductase Inhibitor, on Serum Gonadotropins in Normal Men

August 1992 in “ The Journal of Clinical Endocrinology and Metabolism ”

Roger S. Rittmaster, Lemay A, Zwicker Hj, T P Capizzi, Susan Winch, Ernest E. Moore, Glenn J. Gormley

finasteride 5 alpha-reductase inhibitor serum gonadotropins LH FSH hypothalamic-pituitary-testicular axis Propecia

TLDR Finasteride doesn't affect hormone levels in normal men.

The study investigated the effect of finasteride, a 5 alpha-reductase inhibitor, on serum gonadotropins in normal men. The results showed that finasteride did not significantly affect serum LH or FSH concentrations, indicating that it does not interfere with the hypothalamic-pituitary-testicular axis in normal men.

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Research cited in this study

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research Effects of Finasteride (MK-906), a 5α-Reductase Inhibitor, on Circulating Androgens in Male Volunteers

147 citations, April 1990 in “The Journal of Clinical Endocrinology and Metabolism”

Finasteride safely lowers DHT levels without affecting testosterone.

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6 / 1000+ results

community Be careful when switching from Finasteride to Dutasteride because for more efficacy.

in Finasteride/Dutasteride 13 upvotes 1 month ago

Switching from finasteride to dutasteride may be more effective for hair regrowth due to dutasteride's stronger enzyme inhibition, but combining both drugs could enhance results. Some users report better outcomes with dutasteride, while others recommend a gradual transition to prevent potential hair loss.

community Testosterone is 1600, would taking low dose anti-androgens be a viable treatment option for people who’s T spikes on DHT-blockers?

in Treatment 46 upvotes 1 year ago

The post and conversation are about the user's high testosterone levels and their worsening hair loss despite trying various treatments. They are considering using low doses of anti-androgens to lower their testosterone levels as a potential solution.

community My Testosterone results before and after Finasteride

in Update 146 upvotes 3 years ago

Finasteride significantly increased testosterone levels for the user, with no major side effects except watery semen, which was resolved with zinc supplements. The user's hairline stopped receding and slightly improved.

community My Testosterone is less than 1/3rd In 7 Months since I took Finasteride!

in Finasteride/Dutasteride 113 upvotes 1 year ago

A user experienced a significant drop in testosterone levels after taking finasteride, leading to side effects like low libido and muscle mass loss. Despite its effectiveness for hair, the user decided to stop finasteride due to its impact on hormones, preferring to be bald.

community Just popped my first fin, excited as hell!

in Finasteride/Dutasteride 154 upvotes 5 months ago

A user shared their excitement about starting finasteride for hair loss after trying various ineffective methods. Other users discussed their experiences with finasteride, including shedding phases and side effects, with one mentioning using topical finasteride and minoxidil.

community Topical Finasteride Doesn't Directly Reduce 5ar Enzyme on Scalp

in Finasteride/Dutasteride 72 upvotes 1 year ago

Topical Finasteride doesn't directly reduce 5ar enzyme on scalp and has the same mechanism as oral, needing to go through the liver. Users debate the accuracy of this information and discuss various studies and experiences.

Related Research

1 / 1 results

research Effect of Finasteride, a 5 Alpha-Reductase Inhibitor, on Serum Gonadotropins in Normal Men

30 citations, August 1992 in “The Journal of Clinical Endocrinology and Metabolism”

Finasteride doesn't affect hormone levels in normal men.