Dutasteride — 5-alpha reductase inhibitor. Study the mechanism, listed uses and warnings from the US label on one sourced card.
Generic name
Dutasteride
Class
5-alpha reductase inhibitor
Mechanism
Competitively inhibits type 1 and type 2 5-alpha reductase, blocking conversion of testosterone to DHT.
Used for
Symptomatic benign prostatic hyperplasia in men with an enlarged prostate; The same symptomatic BPH/enlarged-prostate indication in combination with tamsulosin
Common side effects
Impotence; Decreased libido; Ejaculation disorders; Breast disorders
Warnings
Lowers serum PSA (reinterpret values); Possible higher risk of high-grade prostate cancer; Pregnant women should not handle capsules
Interactions
Potent CYP3A4 inhibitors (e.g., ritonavir)
Brand questions use only name pairings verified against the linked product source. Unverified pairings are withheld from these questions; the other study content remains available.
Label date: 20260827 · For learning, not clinical decisions. US label and brand information; always consult the current source.
Source snapshot checked: 2026-10-21. The source document and selected fields were compared. The complete card has not had an independent clinical review.
Mechanism: Competitive, specific inhibitor of type II 5-alpha reductase, blocking conversion of testosterone to DHT.
On both cards: Common side effects — Impotence; Decreased libido
Only on the Finasteride card: Used for — Symptomatic benign prostatic hyperplasia in men with an enlarged prostate, to improve symptoms; Reduction of acute urinary retention and BPH-related surgery risk in men with an enlarged prostate; Reduction of symptomatic BPH progression when combined with doxazosin · Common side effects — Decreased ejaculate volume; Breast enlargement / tenderness; Rash · Warnings — Lowers PSA by about 50% within six months; a confirmed rise from the on-treatment lowest value requires evaluation; May increase high-grade prostate cancer risk; Contraindicated in pregnancy (male fetus risk)
An item counts as shared only when both cards use the same wording. If a card does not list an item, that is not a statement that the effect never occurs.
Capsera