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Silodosin

Silodosin is an approved active ingredient.

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Chemical compound

Informational only — not medical advice. Ask a doctor or pharmacist; never change a dose on your own.

What it is used for

Silodosin, a selective alpha-1 adrenergic receptor antagonist, is indicated for the treatment of the signs and symptoms of benign prostatic hyperplasia (BPH). Silodosin capsules are not indicated for the treatment of hypertension.

US label

Treatment of the signs and symptoms of benign prostatic hyperplasia (BPH)

EMA

How it works

Common side effects

Most common adverse reactions (incidence > 2%) are retrograde ejaculation, dizziness, diarrhea, orthostatic hypotension, headache, nasopharyngitis, and nasal congestion.

US label

Who should not take it

Severe renal impairment (CCr < 30 mL/min) Severe hepatic impairment (Child-Pugh score ≥ 10) Concomitant administration with strong Cytochrome P450 3A4 (CYP3A4) inhibitors (e.g., ketoconazole, clarithromycin, itraconazole, ritonavir) Patients with a history…

US label

Pregnancy and breastfeeding

Silodosin is not indicated for use in females.

and Males of Reproductive Potential Infertility Males Possible effects on male fertility could be observed based on findings in rats at exposures that were at least two times higher than at the MRHD (based on AUC).

Excerpts from the US prescribing label (public domain), copied without changes.

Interactions

Recorded interactions from open sources (Wikidata, US labels). The list is not complete — ask a pharmacist.

Brand names

United States

Rapaflo

European Union

Silodosin Recordati

Canada

Ag-Silodosin · Apo-Silodosin · Auro-Silodosin · Jamp Silodosin · Pms-Silodosin · Sandoz Silodosin

Approval status

US Food and Drug Administration
prescription · since 2008
European Medicines Agency
authorised · since 2010
Health Canada
prescription · marketed
First approval anywhere
2008

Codes

ATC
G04CA04
RxNorm CUI
720825
ChEMBL
CHEMBL24778
PubChem CID
5312125
UNII
CUZ39LUY82
Wikidata
Q411770

Frequently asked questions

What is Silodosin used for?

Silodosin is used for: Prostatic hypertrophy.

What are the brand names of Silodosin?

Brand names of Silodosin include Rapaflo, Silodosin Recordati, Ag-Silodosin, Apo-Silodosin, Auro-Silodosin, Jamp Silodosin, Pms-Silodosin, and Sandoz Silodosin.

Medicines in the same class

Sources and licences

Updated November 15, 2026