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Duloxetine Side Effects

The most commonly reported side effects of duloxetine include nausea, fatigue, and headache, based on 189,084 FDA adverse event reports from 2004 to 2025. 6.6% of reports found the drug to be ineffective.

Duloxetine side effects

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

1
Nausea8.0%15,088
2
Fatigue7.6%14,376
3
Drug Ineffective6.6%12,538
4
Headache6.3%11,979
5
Dizziness6.0%11,432
6
Pain5.8%10,901
7
Off Label Use4.9%9,221
8
Diarrhoea4.8%9,018
9
Anxiety4.4%8,412
10
Insomnia4.4%8,315
11
Vomiting3.8%7,235
12
Drug Withdrawal Syndrome3.8%7,208
13
Depression3.6%6,857
14
Fall3.6%6,794
15
Arthralgia3.5%6,564

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

Report severity

61.4%Serious116,121 reports
26.2%Hospitalizations49,616 reports
6.1%Fatal11,552 reports

Seriousness is determined by the reporter, not by OpenClaim.

Duloxetine drug interactions

Other drugs that appear in adverse event reports alongside duloxetine. 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
Pregabalin4.3%8,053
2
Adalimumab4.0%7,616
3
Sodium-oxybate3.4%6,335
4
Gabapentin3.0%5,584
5
Quetiapine-fumarate2.5%4,715
6
Lenalidomide2.4%4,629
7
Acetaminophen2.0%3,811
8
Etanercept1.9%3,552
9
Omeprazole1.7%3,211
10
Esomeprazole1.5%2,901
11
Aripiprazole1.5%2,818
12
Oxycodone1.5%2,777
13
Bupropion1.4%2,675
14
Tramadol-hydrochloride1.3%2,377
15
Fentanyl1.2%2,343

Taken alongside

1
Acetaminophen15.1%28,579
2
Gabapentin14.1%26,616
3
Ergocalciferol12.3%23,294
4
Levothyroxine-sodium11.9%22,434
5
Aspirin10.4%19,697
6
Omeprazole10.1%19,080
7
Atorvastatin-calcium8.5%16,160
8
Pregabalin8.4%15,861
9
Albuterol8.0%15,177
10
Metformin7.4%14,077
11
Oxycodone7.4%13,901
12
Pantoprazole-sodium6.8%12,865
13
Amlodipine6.8%12,782
14
Furosemide6.7%12,756
15
Metoprolol6.7%12,608

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 duloxetine side effects

69.5% of duloxetine adverse event reports involve female patients and 24.2% involve male patients. The largest age group is adult at 69%. These figures reflect who reports side effects, not underlying risk.

Sex

Female69.5%
Male24.2%
Unknown6.3%

Age group

< 20.5%
2–110.1%
12–170.7%
18–6469.1%
65+29.5%

What is duloxetine used for

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

Abdominal DiscomfortAbdominal PainAbdominal Pain LowerAbdominal Pain UpperAbnormal BehaviourAbnormal DreamsAbuliaAccidentAccidental ExposureAccidental Exposure To ProductAccidental Exposure To Product By ChildAcneActivities Of Daily Living ImpairedAcute Cutaneous Lupus ErythematosusAcute Hepatic Failure

Showing 15 of 1,404 indications

Duloxetine brand names and reporting trend

Duloxetine is sold under the brand name Cymbalta.

Brand names

Cymbalta248

Quarterly reports (20042025)

20052010201520202025

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

Taking duloxetine with another medication?

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