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Selpercatinib Side Effects

The most commonly reported side effects of selpercatinib include malignant neoplasm progression, death, and diarrhoea, based on 1,185 FDA adverse event reports from 2020 to 2025. 2.8% of reports found the drug to be ineffective.

Selpercatinib side effects

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

1
Malignant Neoplasm Progression9.8%116
2
Death8.4%99
3
Diarrhoea5.2%62
4
Hypertension5.1%60
5
Fatigue4.9%58
6
Hypersensitivity4.8%57
7
Rash4.6%54
8
Pyrexia3.8%45
9
Hepatic Function Abnormal3.8%45
10
Alanine Aminotransferase Increased3.3%39
11
Aspartate Aminotransferase Increased3.2%38
12
Electrocardiogram Qt Prolonged3.1%37
13
Ascites3.0%35
14
Nausea2.9%34
15
Thrombocytopenia2.8%33

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

Report severity

75.8%Serious898 reports
31.1%Hospitalizations368 reports
14.9%Fatal177 reports

Seriousness is determined by the reporter, not by OpenClaim.

Selpercatinib drug interactions

Other drugs that appear in adverse event reports alongside selpercatinib. 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
Pemetrexed3.6%43
2
Carboplatin2.8%33
3
Pembrolizumab2.4%28
4
Pralsetinib1.6%19
5
Cabozantinib1.4%17
6
Gemcitabine1.3%15
7
Cisplatin1.3%15
8
Paclitaxel1.0%12
9
Meropenem0.9%11
10
Levofloxacin0.9%11
11
Osimertinib-mesylate0.9%11
12
Etoposide0.8%9
13
Bevacizumab0.6%7
14
Amoxicillin0.5%6
15
Prednisolone0.5%6

Taken alongside

1
Levothyroxine-sodium5.3%63
2
Amlodipine3.2%38
3
Acetaminophen2.3%27
4
Furosemide2.1%25
5
Oxycodone1.9%23
6
Omeprazole1.6%19
7
Apixaban1.6%19
8
Atorvastatin-calcium1.5%18
9
Metoprolol1.4%17
10
Pantoprazole-sodium1.4%16
11
Metformin1.4%16
12
Dexamethasone1.3%15
13
Ergocalciferol1.3%15
14
Gabapentin1.2%14
15
Aspirin1.1%13

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 selpercatinib side effects

48.9% of selpercatinib adverse event reports involve female patients and 39.2% involve male patients. The largest age group is adult at 52%. These figures reflect who reports side effects, not underlying risk.

Sex

Female48.9%
Male39.2%
Unknown11.9%

Age group

< 20.0%
2–110.3%
12–170.4%
18–6452.2%
65+47.1%

What is selpercatinib used for

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

AdenocarcinomaAdenosquamous Cell CarcinomaAnaplastic Thyroid CancerBone CancerBronchial Neoplasm BenignBone CancerBrain NeoplasmBrain Neoplasm MalignantBreast Cancer MetastaticBronchial CarcinomaChemotherapyCancer In RemissionCholangiocarcinomaColon CancerColorectal Cancer

Showing 15 of 89 indications

Selpercatinib brand names and reporting trend

Selpercatinib is sold under the brand name Retevmo.

Brand names

Retevmo470

Quarterly reports (20202025)

2020202220242025

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

Taking selpercatinib with another medication?

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