OpenClaim

Atomoxetine Side Effects

The most commonly reported side effects of atomoxetine include off label use, nausea, and fatigue, based on 24,897 FDA adverse event reports from 2004 to 2025. 7.4% of reports found the drug to be ineffective.

Atomoxetine side effects

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

1
Drug Ineffective7.4%1,837
2
Off Label Use6.6%1,646
3
Nausea5.3%1,326
4
Fatigue4.8%1,206
5
Headache4.5%1,130
6
Vomiting4.4%1,107
7
Dizziness4.1%1,027
8
Pain4.1%1,020
9
Depression4.0%995
10
Abdominal Pain Upper3.9%964
11
Insomnia3.8%953
12
Condition Aggravated3.7%924
13
Abdominal Discomfort3.4%847
14
Drug Ineffective3.4%836
15
Confusional State3.4%835

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

Report severity

46.7%Serious11,619 reports
17.4%Hospitalizations4,335 reports
8.4%Fatal2,085 reports

Seriousness is determined by the reporter, not by OpenClaim.

Atomoxetine drug interactions

Other drugs that appear in adverse event reports alongside atomoxetine. 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
Lamotrigine6.4%1,600
2
Erenumab-aooe6.3%1,565
3
Candesartan-cilexetil6.2%1,550
4
Adalimumab6.2%1,540
5
Leflunomide6.0%1,487
6
Buprenorphine5.9%1,479
7
Diclofenac5.9%1,471
8
Etanercept5.9%1,462
9
Cetirizine-hydrochloride5.8%1,446
10
Desoximetasone5.8%1,435
11
Secukinumab5.6%1,397
12
Abatacept5.6%1,388
13
Rituximab5.5%1,376
14
Infliximab5.5%1,375
15
Tocilizumab5.5%1,369

Taken alongside

1
Methylphenidate5.2%1,299
2
Acetaminophen4.6%1,135
3
Bupropion3.7%925
4
Ergocalciferol3.6%908
5
Dextroamphetamine3.3%834
6
Sertraline-hydrochloride3.3%821
7
Quetiapine-fumarate3.2%789
8
Lamotrigine3.1%775
9
Amphetamine3.1%774
10
Cetirizine-hydrochloride3.1%772
11
Albuterol3.1%766
12
Levothyroxine-sodium3.0%757
13
Ibuprofen2.9%729
14
Fluticasone2.7%677
15
Gabapentin2.6%655

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 atomoxetine side effects

40.5% of atomoxetine adverse event reports involve female patients and 51.5% involve male patients. The largest age group is adult at 47%. These figures reflect who reports side effects, not underlying risk.

Sex

Female40.5%
Male51.5%
Unknown8.0%

Age group

< 20.4%
2–1128.3%
12–1721.8%
18–6447.3%
65+2.1%

What is atomoxetine used for

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

Abnormal BehaviourAddAdhdAdjustment DisorderAdverse Drug ReactionAffect LabilityAffective DisorderAgeusiaAggressionAgitationAmnesiaAnalgesic TherapyAngerAntidepressant TherapyAnxiety

Showing 15 of 289 indications

Atomoxetine brand names and reporting trend

Atomoxetine is sold under the brand name Strattera.

Brand names

Strattera33

Quarterly reports (20042025)

20052010201520202025

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

Taking atomoxetine with another medication?

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