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Dutasteride, sold under the brand name Avodart among others, is a medication primarily used to treat the symptoms of a benign prostatic hyperplasia (BPH), an enlarged prostate not associated with cancer. It is also used to treat pattern hair loss in men as an off-label medication and as an approved medication in South Korea, Japan, and Taiwan. A few months may be required before benefits occur. Dutasteride may also be used as a part of hormone therapy in transgender women. It is usually taken by mouth; however, topical versions exist for those with hair loss, which are designed to minimize systemic exposure by acting specifically on hair follicles.
Read the full article on WikipediaBenign prostatic hyperplasia Clinical criteria: Patient must have lower urinary tract symptoms.
“Dutasteride belongs to a class of drugs called 5α-reductase inhibitors, which block the action of the 5α-reductase enzymes that convert testosterone into DHT. It inhibits all three forms of 5α-reductase, and can decrease DHT levels in the blood by up to 98%. Specifically it is a competitive, mechanism-based (irreversible) inhibitor of all three isoforms of 5α-reductase, types I, II, and III (IC50Tooltip Half-maximal inhibitory concentration values are 3.9 nM for type I and 1.8 nM for type II). This is in contrast to finasteride, which is similarly an irreversible inhibitor of 5α-reductase but only inhibits the type II and III isoenzymes. As a result of this difference, dutasteride is able to achieve a reduction in circulating DHT levels of up to 98%, whereas finasteride is able to achieve a reduction of only 65 to 70%. In spite of the differential reduction in circulating DHT levels, the two drugs decrease levels of DHT to a similar extent of approximately 85 to 90% in the prostate gland, where the type II isoform predominates.”
“4–5 weeks”
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