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Nitazoxanide Side Effects

The most commonly reported side effects of nitazoxanide include diarrhoea, nausea, and chromaturia, based on 822 FDA adverse event reports from 2004 to 2025. 7.7% of reports found the drug to be ineffective.

Nitazoxanide side effects

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

1
Diarrhoea15.1%124
2
Drug Ineffective7.7%63
3
Nausea7.4%61
4
Chromaturia6.9%57
5
Off Label Use6.8%56
6
Abdominal Pain Upper6.0%49
7
Disease Progression5.5%45
8
Dyspnoea5.4%44
9
Headache5.2%43
10
Fatigue4.4%36
11
Abdominal Pain4.4%36
12
Chest Pain4.4%36
13
Therapeutic Product Effect Incomplete3.9%32
14
Coma Scale Abnormal3.8%31
15
Microsporidia Infection3.8%31

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

Report severity

52.4%Serious431 reports
23.6%Hospitalizations194 reports
9.7%Fatal80 reports

Seriousness is determined by the reporter, not by OpenClaim.

Nitazoxanide drug interactions

Other drugs that appear in adverse event reports alongside nitazoxanide. 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
Tacrolimus10.5%86
2
Prednisolone5.8%48
3
Mycophenolate5.7%47
4
Amoxicillin5.5%45
5
Pantoprazole-sodium4.5%37
6
Ribavirin4.4%36
7
Sulfamethoxazole4.4%36
8
Methylprednisolone4.1%34
9
Prednisone4.1%34
10
Cyclophosphamide4.1%34
11
Amlodipine4.1%34
12
Azithromycin4.0%33
13
Furosemide4.0%33
14
Metronidazole3.9%32
15
Ceftriaxone-sodium3.9%32

Taken alongside

1
Acetaminophen8.8%72
2
Azithromycin7.8%64
3
Prednisone6.9%57
4
Ergocalciferol6.8%56
5
Omeprazole6.7%55
6
Ondansetron5.8%48
7
Amoxicillin5.1%42
8
Fluconazole4.9%40
9
Sulfamethoxazole4.7%39
10
Diphenhydramine4.6%38
11
Levothyroxine-sodium4.1%34
12
Lorazepam3.9%32
13
Trimethoprim3.9%32
14
Acyclovir3.9%32
15
Aspirin3.8%31

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 nitazoxanide side effects

50.9% of nitazoxanide adverse event reports involve female patients and 39.4% involve male patients. The largest age group is adult at 69%. These figures reflect who reports side effects, not underlying risk.

Sex

Female50.9%
Male39.4%
Unknown9.7%

Age group

< 20.7%
2–1110.1%
12–173.9%
18–6469.1%
65+16.1%

What is nitazoxanide used for

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

Abdominal DiscomfortAbdominal DistensionAbdominal InfectionAbdominal Pain LowerAbdominal Pain UpperAbnormal BehaviourAmoebiasisAntibiotic TherapyAnxietyAsthmaAbdominal DiscomfortAntiinflammatory TherapyBabesiosisBacterial Disease CarrierBacterial Infection

Showing 15 of 123 indications

Nitazoxanide brand names and reporting trend

Nitazoxanide is sold under the brand name Alinia.

Brand names

Alinia386

Quarterly reports (20042025)

20052010201520202025

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

Taking nitazoxanide with another medication?

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