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Reslizumab Side Effects

The most commonly reported side effects of reslizumab include dyspnoea, asthma, and incorrect dose administered, based on 649 FDA adverse event reports from 2013 to 2025. 12.8% of reports found the drug to be ineffective.

Reslizumab side effects

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

1
Dyspnoea14.6%95
2
Asthma14.2%92
3
Drug Ineffective12.8%83
4
Incorrect Dose Administered10.6%69
5
Hypertension8.3%54
6
Cough6.9%45
7
Headache6.6%43
8
Wheezing6.3%41
9
Fatigue6.0%39
10
Oropharyngeal Pain4.8%31
11
Myalgia4.6%30
12
Nausea4.5%29
13
Pneumonia4.3%28
14
Chest Discomfort4.2%27
15
Urticaria3.9%25

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

Report severity

62.9%Serious408 reports
20.8%Hospitalizations135 reports
2.6%Fatal17 reports

Seriousness is determined by the reporter, not by OpenClaim.

Reslizumab drug interactions

Other drugs that appear in adverse event reports alongside reslizumab. 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
Mepolizumab6.8%44
2
Prednisone4.8%31
3
Prednisolone3.9%25
4
Benralizumab3.9%25
5
Fluticasone3.4%22
6
Montelukast-sodium3.4%22
7
Albuterol2.8%18
8
Mometasone-furoate2.8%18
9
Omalizumab2.5%16
10
Dupilumab2.2%14
11
Beclomethasone1.4%9
12
Salmeterol-xinafoate1.2%8
13
Ipratropium-bromide1.1%7
14
Budesonide0.9%6
15
Rituximab0.9%6

Taken alongside

1
Albuterol23.3%151
2
Prednisone18.0%117
3
Fluticasone15.4%100
4
Tiotropium-bromide14.2%92
5
Budesonide12.3%80
6
Montelukast-sodium10.8%70
7
Formoterol10.8%70
8
Salmeterol-xinafoate8.5%55
9
Ergocalciferol6.6%43
10
Pantoprazole-sodium4.5%29
11
Mometasone-furoate4.3%28
12
Calcium4.3%28
13
Rosuvastatin4.3%28
14
Omeprazole4.2%27
15
Ciclesonide4.0%26

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 reslizumab side effects

58.1% of reslizumab adverse event reports involve female patients and 33.6% involve male patients. The largest age group is adult at 69%. These figures reflect who reports side effects, not underlying risk.

Sex

Female58.1%
Male33.6%
Unknown8.3%

Age group

< 20.2%
2–110.2%
12–170.4%
18–6468.9%
65+30.3%

What is reslizumab used for

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

Aspirin-exacerbated Respiratory DiseaseAsthmaAsthma ProphylaxisAsthmaAsthma ProphylaxisBlood Immunoglobulin E IncreasedCd20 Antigen PositiveCoughDrug LevelDyspnoeaEosinophil Count IncreasedEosinophilic Granulomatosis With PolyangiitisEosinophilic OesophagitisEosinophil Count IncreasedEosinophilia

Showing 15 of 35 indications

Reslizumab brand names and reporting trend

Reslizumab is sold under the brand name Cinqair.

Brand names

Cinqair122

Quarterly reports (20132025)

2013202020242025

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

Taking reslizumab with another medication?

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