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5α-Reductase inhibitors (5-ARIs), also known as dihydrotestosterone (DHT) blockers, are a class of medications with antiandrogenic effects which are used primarily in the treatment of enlarged prostate and scalp hair loss. They are also sometimes used to treat excess hair growth in women and as a component of hormone therapy for transgender ...
This is a list of 5α-reductase inhibitors (5α-RIs), drugs which inhibit one or more isoforms of the enzyme 5α-reductase.This enzyme is responsible for the conversion of the androgen hormone testosterone into the more potent dihydrotestosterone (DHT) and is essential for the production of neurosteroids like allopregnanolone, tetrahydrodeoxycorticosterone (THDOC), and 3α-androstanediol from ...
Dutasteride, however, is a so-called dual inhibitor with both 5α-R1 and 5α-R2 inhibition. IC50 for 5α-R1 is 7 nM but 6 nM for 5α-R2. As mentioned above, it reduces DHT > 90% overall, or precisely 94.7% and for intraprostatic DHT the reduction is 97-99%. Dutasteride has also been found to inhibit 5α-R3, in vitro, with IC50=0.33 nM. [6]
Research shows that taking 5 milligrams (mg) of finasteride a day for benign prostatic hyperplasia (BPH) — an enlarged prostate — can lead to a 15 to 25 percent increase in testosterone levels.
Finasteride is a 5-alpha reductase inhibitor that’s used to treat androgenetic alopecia or androgenic alopecia (the clinical terms for male pattern baldness) and benign prostatic hyperplasia ...
Androgen synthesis inhibitors: Drugs that directly inhibit the enzymatic biosynthesis of androgens like testosterone and/or DHT. [ 89 ] [ 31 ] Examples include the CYP17A1 inhibitors ketoconazole , abiraterone acetate , and seviteronel , [ 89 ] the CYP11A1 (P450scc) inhibitor aminoglutethimide , [ 89 ] and the 5α-reductase inhibitors ...