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Glossary Nonsteroidal Antiandrogens

medications that block male hormones without activating their receptors

Nonsteroidal Antiandrogens (NSAA) are medications that block the action of androgens (male hormones like testosterone) by binding to androgen receptors without activating them. They are commonly used in the treatment of conditions like prostate cancer and androgenic alopecia (hair loss) by preventing androgens from stimulating the growth of cancer cells or hair follicles.

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Research

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research Preliminary pharmacokinetics and metabolism of novel non-steroidal antiandrogens in the rat: Relation of their systemic activity to the formation of a common metabolite

16 citations , October 1994 in “The Journal of Steroid Biochemistry and Molecular Biology”

Two non-steroidal antiandrogens, RU 58841 and RU 56187, form a common metabolite at different rates, which may influence their effects; RU 56187 could be used for prostate cancer treatment and RU 58841 for acne treatment.

research A controlled study of the effects of RU58841, a non-steroidal antiandrogen, on human hair production by balding scalp grafts maintained on testosterone-conditioned nude mice

10 citations , November 1997 in “British Journal of Dermatology”

This study found that the non-steroidal antiandrogen RU58841 increased hair growth rates and promoted hair cycle initiation in balding human scalp grafts on testosterone-conditioned nude mice, indicating a positive effect on hair growth.

research Synthesis and Structure–Activity Relationships of the First Ferrocenyl-Aryl-Hydantoin Derivatives of the Nonsteroidal Antiandrogen Nilutamide

88 citations , February 2008 in “Journal of Medicinal Chemistry”

Scientists made the first metal-based compounds from a nonsteroidal antiandrogen drug, which showed potential in fighting both hormone-dependent and independent prostate cancer cells.

research Histological and immunohistochemical examination of the effect of the nonsteroidal antiandrogen {flutamide} on some organs of the male reproductive system in albino rats

September 2012 in “The Egyptian Journal of Histology”

In this study, flutamide at therapeutic doses caused significant histological changes in the testes and epididymis of adult albino rats, reducing androgen receptor immunoreactivity and increasing estrogen receptor immunoreactivity.

research A controlled study of the effects of RU58841, a non-steroidal antiandrogen, on human hair production by balding scalp grafts maintained on testosterone-conditioned nude mice

9 citations , November 1997 in “British Journal of Dermatology”

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community Has anyone find a way to stop/limit ru58841 to go systematic ?

in Finasteride/Dutasteride 4 upvotes 1 year ago

RU58841 is a strong non-steroidal antiandrogen for hair loss but may cause cardiovascular issues in some users. Alternatives like Pyrilutamide and Breezula are suggested due to better safety profiles and lower systemic risks.

community Why Fin/Dut Isn't Working for You GPR133: a new hairloss mechanism + Steroid Hair Loss Deep Dive

6 upvotes 2 months ago

Hair loss may be linked to the GPR133 receptor, independent of the androgen receptor pathway. Treatments like finasteride, dutasteride, minoxidil, RU58841, and KX-826 show varying results, with hair loss persisting due to high testosterone and GPR133's role.

community Severe dry eye: finasteride vs dutasteride

8 upvotes 5 years ago

Woman uses antiandrogens for hair thinning prevention, experiences severe dry eye with finasteride. Asks if dutasteride could be better despite potential for worse dry eye.

community Consenus on Kx-826/pyrilutamide vs ru58841

11 upvotes 2 weeks ago

KX-826 is considered effective for hair maintenance, with better safety research than RU58841, but lacks positive anecdotes. RU58841 is seen as potentially stronger, but concerns exist about systemic effects; combining anti-androgens with 5AR inhibitors is suggested for better results.

community Seeking Advice on Norwood 3 Hairline at Age 15

in Basic Questions 533 upvotes 10 months ago

A 15-year-old is concerned about hair loss, possibly at Norwood 2 or 3, and is using shampoos and conditioners recommended by a trichologist. Suggestions include considering topical minoxidil and consulting a doctor about topical anti-DHT treatments like finasteride or RU58841, but avoiding 5-alpha-reductase inhibitors at this age.

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