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What the label lists and what reports show

Duloxetine side effects

Duloxetine's FDA label: “Most common adverse reactions (≥5% and at least twice the incidence of placebo-treated patients): (6.1) Adults: nausea, dry mouth, somnolence, constipation, decreased appetite, and hyperhidrosis Pediatric Patients: nausea, diarrhea, decreased weight To report …” FAERS holds 69,298 reports naming it through July 30, 2026; the reaction reported most often, leaving out the conditions it is used for, product-use terms and outcomes, is nausea (5,140 reports).

  • Generic listed
  • Boxed warning

Check it at the source: the duloxetine FDA label on DailyMed (effective May 14, 2024, SUN PHARMACEUTICAL INDUSTRIES, INC.); the FDA FAERS public dashboard.

What does the patient leaflet say about side effects?

From the patient leaflet: What are the possible side effects of DRIZALMA SPRINKLE?

DRIZALMA SPRINKLE may cause serious side effects, including: •See, “What is the most important information I should know about DRIZALMA SPRINKLE?” • Liver problems. DRIZALMA SPRINKLE may cause severe liver problems that may cause death. Tell your healthcare provider right away if you develop any of the following symptoms of severe liver problems:• Decreased in blood pressure (orthostatic hypotension). You may feel lightheaded or faint when you rise too quickly from a sitting or lying position, especially when you start or restart treatment or when the dose is changed.• Falls and fainting. DRIZALMA SPRINKLE may cause you to feel sleepy or dizzy, may cause a decrease in your blood pressure when you rise to quickly from a sitting or lying position, and can slow your thinking and motor skills which may lead to falls that have caused fractures or other serious injuries.• Serotonin syndrome. […]

Source: FDA drug label, SUN PHARMACEUTICAL INDUSTRIES, INC., effective May 14, 2024 (SPL set b41423b8-dfec-4d79-ba3c-e43a87803d85), via openFDA; the full label on DailyMed

What does the label list?

From the label: adverse reactions

Most common adverse reactions (≥5% and at least twice the incidence of placebo-treated patients): (6.1) Adults: nausea, dry mouth, somnolence, constipation, decreased appetite, and hyperhidrosis Pediatric Patients: nausea, diarrhea, decreased weight To report SUSPECTED ADVERSE REACTIONS, contact Sun Pharmaceutical Industries, Inc.

Table 3: Adverse Reactions: Incidence of 2% or More and Greater than Placebo in MDD and GAD Placebo-Controlled Trials in Adults a,b

This table is printed in the Duloxetine label published by Almatica Pharma LLC of March 2, 2026; the label quoted above does not print one.

ReactionSystem Organ Class / Adverse Reaction Another Duloxetine Product (N=4797)Percentage of Patients Reporting Reaction Placebo (N=3303)
Cardiac Disorders Palpitations21
Eye Disorders Vision blurred31
Nausea c238
Dry mouth146
Constipation c94
Diarrhea96
Abdominal pain d54
Vomiting42
General Disorders and Administration Site Conditions Fatigue e95
Metabolism and Nutrition Disorders Decreased appetite c62
Headache1414
Dizziness c95
Somnolence f93
Tremor31
Insomnia g95
Agitation h42
Anxiety32
Erectile dysfunction41
Ejaculation delayed c21
Libido decreased i31
Orgasm abnormal j2<1
Respiratory, Thoracic, and Mediastinal Disorders Yawning2<1
Skin and Subcutaneous Tissue Disorders Hyperhidrosis62

Rows and numbers as the label prints them, under its own column headings (the first rows of a longer table where it runs on). A reaction in a trial table is not necessarily caused by the medicine, and trials differ from everyday use.

From the label: adverse reactions, continued

The following adverse reactions are discussed in more detail in other sections of the labeling: Suicidal Thoughts and Behaviors in Adolescents and Young Adults [see Boxed Warning and Warnings and Precautions (5.1)] Hepatotoxicity [see Warnings and Precautions (5.2)] Orthostatic Hypotension, Falls and Syncope [see Warnings and Precautions (5.3)] Serotonin Syndrome [see Warnings and Precautions (5.4)] Increased Risk of Bleeding [see Warnings and Precautions (5.5)] Severe Skin Reactions [see Warnings and Precautions (5.6)] Discontinuation Syndrome [see Warnings and Precautions (5.7)] Activation of Mania/Hypomania [see Warnings and Precautions (5.8)] Angle-Closure Glaucoma [see Warnings and Precautions (5.9)] Seizures [see Warnings and Precautions (5.10)] Increases in Blood Pressure [see Warnings and Precautions (5.11)] Clinically Important Drug Interactions [see Warnings and Precautions (5.12)] Hyponatremia [see Warnings and Precautions (5.13)] Urinary Hesitation and Retention [see Warnings and Precautions (5.15)] Sexual Dysfunction [see Warnings and Precautions (5.16)] Most common adverse reactions (≥5% and at least twice the incidence of placebo-treated patients): (6.1) Adults: nausea, dry mouth, somnolence, constipation, decreased appetite, and hyperhidrosis Pediatric Patients: nausea, diarrhea, decreased weight To report SUSPECTED ADVERSE REACTIONS, contact Sun Pharmaceutical …

Source: FDA drug label, SUN PHARMACEUTICAL INDUSTRIES, INC., effective May 14, 2024 (SPL set b41423b8-dfec-4d79-ba3c-e43a87803d85), via openFDA; the full label on DailyMed

What do FAERS reports show?

69,298 reports list duloxetine among the medicines taken, each a report of something that happened, not proof the medicine caused it; 7,118 are coded as a death and 22,135 as a hospital stay. Counts follow how widely a medicine is used and watched, and they are not a measure of how risky it is. Of the 16 reactions below, 11 are named by the same term (in US spelling) in the label's adverse reactions, warnings or patient leaflet; a reaction the label does not name may still be there under another word, and a report does not show that the medicine caused it.

Reports received each year

The 25 most reported reactions

  • Drug Ineffective (a use or a product term, not a reaction)5,438
  • Nausea (named in the label)5,140
  • Fatigue (named in the label)5,059
  • Off Label Use (a use or a product term, not a reaction)4,390
  • Pain (a use or a product term, not a reaction)3,916
  • Headache (named in the label)3,913
  • Diarrhoea (named in the label)3,508
  • Dizziness (named in the label)3,223
  • Fall2,948
  • Vomiting (named in the label)2,625
  • Arthralgia2,499
  • Dyspnoea2,470
  • Toxicity To Various Agents2,360
  • Depression (a use or a product term, not a reaction)2,252
  • Completed Suicide (an outcome recorded in the report)2,204
  • Drug Interaction (a use or a product term, not a reaction)2,181
  • Anxiety (a use or a product term, not a reaction)2,077
  • Asthenia (named in the label)2,046
  • Somnolence (named in the label)2,012
  • Malaise (named in the label)1,895
  • Condition Aggravated (a use or a product term, not a reaction)1,804
  • Pain In Extremity1,800
  • Insomnia (named in the label)1,793
  • Death (an outcome recorded in the report)1,787
  • Hyperhidrosis (named in the label)1,778

Source: FDA Adverse Event Reporting System (FAERS) via openFDA, reports through July 30, 2026; reactions as MedDRA preferred terms

What next?

Duloxetine: the full record
label, generics, price, shortages, recalls
Side effects hub
the most reported medicines and reactions