OpenClaim

Albendazole Side Effects

The most commonly reported side effects of albendazole include off label use, product use in unapproved indication, and pyrexia, based on 1,914 FDA adverse event reports from 2004 to 2025. 18.5% of reports found the drug to be ineffective.

Albendazole side effects

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

1
Drug Ineffective18.5%355
2
Off Label Use14.9%286
3
Product Use In Unapproved Indication11.8%225
4
Pyrexia10.6%203
5
Condition Aggravated10.6%203
6
Headache9.9%190
7
Weight Decreased8.5%163
8
Fatigue8.4%160
9
Pain8.3%158
10
Haematochezia8.2%156
11
Rash8.1%155
12
Rectal Haemorrhage7.7%148
13
Colitis Ulcerative7.7%148
14
Stress7.7%147
15
Intentional Product Use Issue7.7%147

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

Report severity

86.1%Serious1,648 reports
36.7%Hospitalizations702 reports
15.9%Fatal304 reports

Seriousness is determined by the reporter, not by OpenClaim.

Albendazole drug interactions

Other drugs that appear in adverse event reports alongside albendazole. 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
Prednisone13.2%252
2
Ivermectin11.5%220
3
Budesonide9.1%175
4
Adalimumab8.7%166
5
Hydrocortisone8.4%160
6
Infliximab8.1%155
7
Mesalamine8.0%153
8
Warfarin7.9%152
9
Vedolizumab7.9%152
10
Sulfasalazine7.6%146
11
Omeprazole7.6%145
12
Candesartan-cilexetil7.1%136
13
Aspirin6.9%133
14
Gabapentin6.8%130
15
Levothyroxine-sodium6.8%130

Taken alongside

1
Acetaminophen8.9%170
2
Methotrexate8.2%156
3
Amlodipine7.8%150
4
Tofacitinib7.3%139
5
Folic-acid7.2%138
6
Ramipril6.7%129
7
Atorvastatin-calcium6.7%129
8
Bisoprolol-fumarate6.4%122
9
Dorzolamide-hydrochloride6.3%121
10
Latanoprost6.3%120
11
Lansoprazole6.2%119
12
Fesoterodine-fumarate6.1%116
13
Pregabalin5.9%113
14
Rivaroxaban5.9%113
15
Omeprazole5.7%110

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 albendazole side effects

41.8% of albendazole adverse event reports involve female patients and 46.9% involve male patients. The largest age group is adult at 68%. These figures reflect who reports side effects, not underlying risk.

Sex

Female41.8%
Male46.9%
Unknown11.2%

Age group

< 21.5%
2–1110.1%
12–175.6%
18–6468.2%
65+14.6%

What is albendazole used for

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

Abdominal InfectionAbdominal PainAcarodermatitisAnaemiaAnaemia MegaloblasticAnal PruritusAnalgesic TherapyAntifungal ProphylaxisAntifungal TreatmentAntiretroviral TherapyAplastic AnaemiaArachnoid CystArthropod BiteAscariasisAscites

Showing 15 of 210 indications

Albendazole brand names and reporting trend

Albendazole is sold under the brand name Albenza.

Brand names

Albenza2,081

Quarterly reports (20042025)

20052010201520202025

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

Taking albendazole with another medication?

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