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Mogamulizumab Side Effects

The most commonly reported side effects of mogamulizumab include rash, disease progression, and infusion related reaction, based on 1,744 FDA adverse event reports from 2012 to 2025. 4.5% of reports found the drug to be ineffective.

#1 Reported: RashAll side effects ↓Top Co-Medication: CyclophosphamideDrug interactions ↓63% of Reports Are ElderlyDemographics ↓

Mogamulizumab side effects

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

1
Rash13.9%242
2
Disease Progression9.3%163
3
Infusion Related Reaction5.6%98
4
Pruritus5.2%90
5
Drug Eruption4.8%84
6
Pyrexia4.6%81
7
Drug Ineffective4.5%79
8
Death4.0%70
9
Erythema3.6%63
10
Fatigue3.6%62
11
Inappropriate Schedule Of Product Administration2.9%51
12
Chills2.8%49
13
Diarrhoea2.8%48
14
Nausea2.6%46
15
Off Label Use2.6%46

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

Report severity

65.8%Serious1,147 reports
23.2%Hospitalizations405 reports
18.1%Fatal316 reports

Seriousness is determined by the reporter, not by OpenClaim.

Mogamulizumab drug interactions

Other drugs that appear in adverse event reports alongside mogamulizumab. 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
Cyclophosphamide6.6%115
2
Doxorubicin-hydrochloride6.2%108
3
Vincristine-sulfate6.0%104
4
Etoposide5.3%93
5
Prednisolone5.0%88
6
Prednisone3.2%56
7
Carboplatin2.8%49
8
Lenalidomide2.2%39
9
Methotrexate2.1%37
10
Dexamethasone1.9%34
11
Bexarotene1.9%34
12
Gemcitabine1.3%23
13
Cytarabine1.3%22
14
Nivolumab1.3%22
15
Brentuximab-vedotin1.2%21

Taken alongside

1
Acetaminophen5.6%98
2
Prednisone4.3%75
3
Hydrocortisone4.1%72
4
Magnesium-oxide3.2%55
5
Levothyroxine-sodium3.2%55
6
Fluconazole3.1%54
7
Dexchlorpheniramine-maleate3.1%54
8
Prednisolone3.0%52
9
Furosemide2.8%48
10
Dexamethasone2.4%41
11
Febuxostat2.4%41
12
Cefepime-hydrochloride2.4%41
13
Diphenhydramine2.2%39
14
Filgrastim2.2%38
15
Acyclovir2.1%37

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 mogamulizumab side effects

5.0% of mogamulizumab adverse event reports involve female patients and 10.1% involve male patients. The largest age group is elderly at 63%. These figures reflect who reports side effects, not underlying risk.

Sex

Female5.0%
Male10.1%
Unknown84.9%

Age group

< 20.0%
2–110.4%
12–170.4%
18–6436.7%
65+62.5%

What is mogamulizumab used for

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

Adenocarcinoma PancreasAdult T-cell Lymphoma/leukaemiaAdult T-cell Lymphoma/leukaemia RecurrentAdult T-cell Lymphoma/leukaemia RefractoryAnaplastic Large Cell Lymphoma T- And Null-cell TypesAnaplastic Large-cell LymphomaAngioimmunoblastic T-cell LymphomaAngioimmunoblastic T-cell Lymphoma RefractoryAngioimmunoblastic T-cell Lymphoma Stage IvAdult T-cell Lymphoma/leukaemiaAdult T-cell Lymphoma/leukaemia RecurrentAnaplastic Large Cell Lymphoma T- And Null-cell TypesAngioimmunoblastic T-cell LymphomaBrain Neoplasm MalignantColorectal Cancer Metastatic

Showing 15 of 88 indications

Mogamulizumab brand names and reporting trend

Mogamulizumab is sold under the brand name Poteligeo.

Brand names

Poteligeo956

Quarterly reports (2012–2025)

20122016202020242025

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

Taking mogamulizumab with another medication?

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

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