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Silodosin Side Effects

The most commonly reported side effects of silodosin include off label use, fatigue, and dizziness, based on 7,391 FDA adverse event reports from 2007 to 2025. 4.6% of reports found the drug to be ineffective.

Silodosin side effects

Percentages show how often each reaction appears relative to total reports for silodosin.

1
Drug Ineffective4.6%341
2
Off Label Use4.6%339
3
Fatigue4.5%336
4
Dizziness4.1%300
5
Diarrhoea3.9%287
6
Death3.6%266
7
Fall3.5%258
8
Asthenia3.3%244
9
Dyspnoea3.1%231
10
Nausea2.8%209
11
Acute Kidney Injury2.6%195
12
Pyrexia2.4%179
13
Pneumonia2.4%177
14
Headache2.4%174
15
Hypotension2.2%164

These are voluntary reports and do not establish that silodosin caused these reactions.

Report severity

75.4%Serious5,574 reports
39.8%Hospitalizations2,944 reports
11.6%Fatal854 reports

Seriousness is determined by the reporter, not by OpenClaim.

Silodosin drug interactions

Other drugs that appear in adverse event reports alongside silodosin. Drugs flagged as a suspected cause appear in the first column. Drugs taken at the same time but not suspected appear in the second.

Also suspected

1
Lenalidomide3.3%244
2
Pantoprazole-sodium2.9%214
3
Apixaban2.1%153
4
Furosemide2.0%148
5
Aspirin1.9%142
6
Rosuvastatin1.9%142
7
Omeprazole1.8%136
8
Enzalutamide1.7%126
9
Dutasteride1.7%125
10
Atorvastatin-calcium1.6%115
11
Amlodipine1.5%112
12
Metformin1.5%111
13
Levodopa1.4%106
14
Pregabalin1.4%102
15
Carbidopa1.4%102

Taken alongside

1
Aspirin15.3%1,131
2
Atorvastatin-calcium12.0%889
3
Amlodipine11.6%857
4
Acetaminophen11.4%842
5
Furosemide9.5%703
6
Ergocalciferol9.3%685
7
Omeprazole8.8%648
8
Metformin8.2%605
9
Pantoprazole-sodium7.9%586
10
Dutasteride7.9%585
11
Rosuvastatin7.0%518
12
Metoprolol6.7%495
13
Levothyroxine-sodium6.6%485
14
Finasteride6.3%466
15
Bisoprolol-fumarate6.3%462

Co-occurrence in adverse event reports does not establish a drug interaction. Patients often take multiple medications, and these lists reflect prescribing patterns rather than causal relationships. Consult a healthcare provider about potential drug interactions.

Who reports silodosin side effects

3.8% of silodosin adverse event reports involve female patients and 89.1% involve male patients. The largest age group is elderly at 79%. These figures reflect who reports side effects, not underlying risk.

Sex

Female3.8%
Male89.1%
Unknown7.1%

Age group

< 2<0.1%
2–11<0.1%
12–17<0.1%
18–6420.8%
65+79.2%

What is silodosin used for

Conditions and purposes for which patients were taking silodosin when the adverse event was reported.

Adverse EventAbdominal PainAcute Kidney InjuryAdverse EventArrhythmiaBenign Prostatic HyperplasiaBladder CancerBladder DiscomfortBladder DisorderBladder DysfunctionBladder Neck ObstructionBladder ObstructionBladder Outlet ObstructionBladder ProlapseBladder Spasm

Showing 15 of 168 indications

Silodosin brand names and reporting trend

Silodosin is sold under the brand name Rapaflo.

Brand names

Rapaflo4,622

Quarterly reports (20072025)

20072010201520202025

An upward trend reflects increased FAERS reporting overall, not necessarily increased risk.

Taking silodosin with another medication?

Ask OpenClaim about your specific drug combination. Get a sourced report using FDA data, drug labels, and medical literature.