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Eltrombopag Olamine side effects: what 22,929 FDA adverse event reports show

Eltrombopag Olamine · 1,073 reaction terms · 62,426 drug–reaction co-reports · data 2026-09-14
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Drug class

Not stated in label

Who reports

22,929 reports · 65% serious · 4,879 with death outcome · 55% female

openFDA FAERS counts, all years, deduplication not applied

Used for

Eltrombopag tablets are thrombopoietin receptor agonist indicated: for the treatment of thrombocytopenia in adult and pediatric patients 1 year and older with persistent or chronic immune thrombocytopenia (ITP) who have had an insufficient response to corticosteroids, immunoglobulins, or splenectomy.

FDA label, Indications and Usage

What it is

Eltrombopag tablets contain eltrombopag olamine, a small molecule thrombopoietin (TPO) receptor agonist for oral administration. Eltrombopag olamine is a biphenyl hydrazone.

FDA label, Description section

Boxed warning

RISK FOR HEPATIC DECOMPENSATION IN PATIENTS WITH CHRONIC HEPATITIS C and RISK OF HEPATOTOXICITY. THESE HIHGLIGHTS DO NOT INCLUDE ALL THE INFORMATION NEEDED TO USE WARNING: RISK FOR HEPATIC DECOMPENSATION IN PATIENTS WITH CHRONIC HEPATITIS C and RISK OF HEPATOTOXICITY See full prescribing information for complete boxed warning.

FDA label
How to read this page. FAERS is a spontaneous-reporting system: counts are not incidence rates and a signal is not proof of causation. Each reaction below is run through an automated screen — is the term in the FDA label (known), in the indications (the disease being treated), an administrative/coding term, or none of these (unlabeled)? That screen is mechanical text matching, not a causality assessment. The 30 hand-written Bradford Hill assessments are on the causality assessment page. Not medical advice.

Causality screen of the 40 strongest signals

Labeled — boxed warning 4Labeled adverse reaction 1Labeled (related wording) 3Likely indication confounding 3Reporting / coding artifact 1Lab value / disease marker 3Not in label — unassessed 25
What the badges mean

Strongest disproportionality signals

Flagged terms (PRR ≥ 2, χ² ≥ 4, n ≥ 10), ranked by PRR; infinite PRRs (no comparator reports) excluded. The EBGM column is a second, shrinkage-based estimate (MGPS) with its 5th percentile EB05 and the BCPNN IC025; a pair flagged by PRR alone is marked PRR-only and should be read as fragile. The strata column recomputes the PRR on serious reports only and flags pairs whose reports are unusually skewed by sex or come mostly from consumers rather than clinicians. 1,033 further terms are in the interactive explorer. Reaction links open the term's cross-drug page.

Show:
ReactionReportsPRR 95% CI · ROR · χ²/pEBGM EB05 · IC025Label screenSerious-only & strataTrial cross-check
Bone marrow reticulin fibrosis54236.3
175.2–318.8ROR 236.9 · χ² 9,841 / p <1e-300
175.9 EB05 139.9 · IC025 +5.7
3/3 methods agree
Not in label — unassessedserious n=48not reported in cached trials
Paroxysmal nocturnal haemoglobinuria49109.1
81.1–146.7ROR 109.3 · χ² 4,585 / p <1e-300
93.9 EB05 73.9 · IC025 +5.2
3/3 methods agree
Not in label — unassessedserious n=49not reported in cached trials
Mucocutaneous haemorrhage1392.3
52.2–163.3ROR 92.3 · χ² 984 / p 3e-216
74.9 EB05 46.6 · IC025 +3.4
3/3 methods agree
Not in label — unassessedserious n=13not reported in cached trials
Platelet count increased1,11285.1
80.1–90.4ROR 89.4 · χ² 84,418 / p <1e-300
77.7 EB05 74.0 · IC025 +6.1
3/3 methods agree
Lab value / disease markerserious PRR 51.7 · 74% consumerNCT00351468: 3/302 (1.0%) on Eltrombopag Olamine (serious AE)
Platelet count abnormal48580.0
73.0–87.7ROR 81.7 · χ² 34,689 / p <1e-300
73.4 EB05 68.0 · IC025 +5.9
3/3 methods agree
Lab value / disease markerserious n=332NCT00351468: 3/302 (1.0%) on Eltrombopag Olamine (serious AE)
Immune thrombocytopenia29664.8
57.6–72.8ROR 65.6 · χ² 17,284 / p <1e-300
60.3 EB05 54.7 · IC025 +5.6
3/3 methods agree
Likely indication confounding
term in indications; also in warnings
serious n=295not reported in cached trials
Oral blood blister1364.8
36.9–113.7ROR 64.8 · χ² 703 / p 3e-155
55.8 EB05 34.7 · IC025 +3.3
3/3 methods agree
Not in label — unassessedserious n=13not reported in cached trials
Evans syndrome2958.6
40.3–85.3ROR 58.7 · χ² 1,489 / p <1e-300
53.3 EB05 38.9 · IC025 +4.2
3/3 methods agree
Not in label — unassessedserious n=29 · ♀ 88% (drug 55%)not reported in cached trials
Aplastic anaemia21639.3
34.3–45.0ROR 39.6 · χ² 7,685 / p <1e-300
37.6 EB05 33.5 · IC025 +4.9
3/3 methods agree
Labeled — boxed warning
exact term
serious n=215not reported in cached trials
Platelet count decreased4,02535.9
34.9–36.9ROR 43.3 · χ² 131,957 / p <1e-300
34.6 EB05 33.7 · IC025 +5.1
3/3 methods agree
Labeled — boxed warning
synonym match
serious PRR 25.0NCT00351468: 3/302 (1.0%) on Eltrombopag Olamine (serious AE)
Labelled drug-food interaction medication error1935.8
22.7–56.7ROR 35.9 · χ² 586 / p 1e-129
33.5 EB05 22.6 · IC025 +3.4
3/3 methods agree
Not in label — unassessedserious n=7not reported in cached trials
Cerebral venous sinus thrombosis2933.5
23.1–48.6ROR 33.6 · χ² 851 / p 2e-187
31.8 EB05 23.2 · IC025 +3.8
3/3 methods agree
Not in label — unassessedserious n=28 · ♀ 82% (drug 55%)not reported in cached trials
Myelofibrosis10733.5
27.6–40.6ROR 33.6 · χ² 3,219 / p <1e-300
32.1 EB05 27.3 · IC025 +4.5
3/3 methods agree
Not in label — unassessedserious n=105not reported in cached trials
Splenectomy4032.6
23.8–44.6ROR 32.6 · χ² 1,151 / p 1e-252
31.1 EB05 23.8 · IC025 +4.0
3/3 methods agree
Likely indication confounding
term in indications
serious n=36not reported in cached trials
Transplant dysfunction5428.9
22.1–37.9ROR 29.0 · χ² 1,383 / p <1e-300
27.8 EB05 22.1 · IC025 +4.0
3/3 methods agree
Not in label — unassessedserious n=54 · ♀ 76% (drug 55%) · 100% cliniciannot reported in cached trials
Petechiae31528.5
25.5–31.9ROR 28.9 · χ² 8,092 / p <1e-300
27.7 EB05 25.2 · IC025 +4.5
3/3 methods agree
Not in label — unassessedserious PRR 27.7not reported in cached trials
Thrombocytosis10025.7
21.1–31.4ROR 25.8 · χ² 2,287 / p <1e-300
24.9 EB05 21.1 · IC025 +4.2
3/3 methods agree
Not in label — unassessedserious n=79not reported in cached trials
Antiphospholipid syndrome4224.6
18.1–33.5ROR 24.7 · χ² 904 / p 6e-199
23.8 EB05 18.3 · IC025 +3.7
3/3 methods agree
Labeled adverse reaction
exact term
serious n=42not reported in cached trials
Idiopathic thrombocytopenic purpura4124.0
17.6–32.7ROR 24.0 · χ² 858 / p 8e-189
23.2 EB05 17.8 · IC025 +3.7
3/3 methods agree
Not in label — unassessedserious n=40not reported in cached trials
Mean platelet volume increased1523.6
14.1–39.4ROR 23.6 · χ² 295 / p 2e-66
22.4 EB05 14.2 · IC025 +2.9
3/3 methods agree
Lab value / disease markerserious n=14not reported in cached trials
Marrow hyperplasia1723.2
14.3–37.5ROR 23.2 · χ² 330 / p 5e-74
22.0 EB05 14.5 · IC025 +3.0
3/3 methods agree
Not in label — unassessedserious n=17not reported in cached trials
Chronic myelomonocytic leukaemia1622.5
13.7–37.0ROR 22.5 · χ² 300 / p 2e-67
21.4 EB05 13.8 · IC025 +2.9
3/3 methods agree
Not in label — unassessedserious n=16not reported in cached trials
Biopsy bone marrow abnormal1122.4
12.3–40.8ROR 22.4 · χ² 199 / p 1e-45
20.9 EB05 12.0 · IC025 +2.5
3/3 methods agree
Not in label — unassessedserious n=8not reported in cached trials
Oesophageal adenocarcinoma1019.6
10.5–36.7ROR 19.7 · χ² 155 / p 6e-36
18.0 EB05 9.5 · IC025 +2.3
3/3 methods agree
Not in label — unassessedserious n=10not reported in cached trials
Immune thrombocytopenic purpura6019.5
15.1–25.2ROR 19.6 · χ² 1,014 / p 9e-223
19.0 EB05 15.3 · IC025 +3.6
3/3 methods agree
Not in label — unassessedserious n=58 · ♀ 30% (drug 55%)NCT00351468: 1/302 (0.3%) on Eltrombopag Olamine (serious AE)
Platelet count1219.3
10.9–34.2ROR 19.3 · χ² 186 / p 1e-42
18.0 EB05 10.3 · IC025 +2.5
3/3 methods agree
Labeled — boxed warning
exact term
–NCT00351468: 3/302 (1.0%) on Eltrombopag Olamine (serious AE)
Iron overload2219.0
12.5–29.0ROR 19.0 · χ² 350 / p 2e-78
18.3 EB05 12.5 · IC025 +3.0
3/3 methods agree
Not in label — unassessedserious n=19not reported in cached trials
Eye colour change2018.4
11.8–28.7ROR 18.5 · χ² 306 / p 7e-69
17.7 EB05 11.8 · IC025 +2.9
3/3 methods agree
Not in label — unassessedserious n=8 · ♀ 80% (drug 55%)not reported in cached trials
Product supply issue13517.8
15.0–21.1ROR 17.9 · χ² 2,086 / p <1e-300
17.5 EB05 15.1 · IC025 +3.8
3/3 methods agree
Reporting / coding artifactserious n=106 · 93% consumernot reported in cached trials
Mucosal haemorrhage2217.8
11.7–27.1ROR 17.8 · χ² 325 / p 5e-73
17.1 EB05 11.7 · IC025 +3.0
3/3 methods agree
Not in label — unassessedserious n=22 · 100% cliniciannot reported in cached trials
Discouragement4417.7
13.2–23.9ROR 17.7 · χ² 664 / p 8e-147
17.2 EB05 13.3 · IC025 +3.4
3/3 methods agree
Not in label — unassessedserious n=43 · ♀ 82% (drug 55%) · 100% consumernot reported in cached trials
Cerebral venous thrombosis3316.8
11.9–23.8ROR 16.9 · χ² 467 / p 7e-104
16.3 EB05 12.0 · IC025 +3.2
3/3 methods agree
Not in label — unassessedserious n=33 · ♀ 76% (drug 55%) · 100% cliniciannot reported in cached trials
Head banging1016.2
8.6–30.2ROR 16.2 · χ² 125 / p 2e-29
14.3 EB05 7.1 · IC025 +2.1
3/3 methods agree
Not in label — unassessedserious n=9not reported in cached trials
Platelet transfusion2216.0
10.5–24.4ROR 16.0 · χ² 290 / p 3e-65
15.3 EB05 10.3 · IC025 +2.9
3/3 methods agree
Not in label — unassessedserious n=18not reported in cached trials
Portal vein thrombosis5315.3
11.7–20.1ROR 15.3 · χ² 682 / p 1e-150
14.9 EB05 11.8 · IC025 +3.3
3/3 methods agree
Labeled — boxed warning
exact term
serious n=53not reported in cached trials
Gingival bleeding20714.0
12.2–16.1ROR 14.2 · χ² 2,458 / p <1e-300
13.8 EB05 12.3 · IC025 +3.5
3/3 methods agree
Likely indication confounding
shares a disease stem with the indications wording
serious PRR 17.0NCT00351468: 1/302 (0.3%) on Eltrombopag Olamine (serious AE)
Superior sagittal sinus thrombosis1213.8
7.8–24.3ROR 13.8 · χ² 128 / p 7e-30
12.1 EB05 6.5 · IC025 +2.2
3/3 methods agree
Not in label — unassessedserious n=12not reported in cached trials

Trial evidence (ClinicalTrials.gov)

✓ Trial adverse-event data found on ClinicalTrials.gov

Largest completed trials with posted results that list Eltrombopag Olamine as a study intervention. The right-hand column of the signal table shows whether each FAERS term was also recorded in these trials, with a real denominator (8 of 40 signal terms matched).

Caveats: trial populations, doses and follow-up differ from the reporting population; AE terms are sponsor-coded and matched here by wording; absence from a trial list means the term was not reported above the sponsor's frequency threshold, not that it cannot occur.

Most frequently reported reactions

By raw co-report count, regardless of disproportionality. Common terms here are often the illness itself or generic outcomes.

ReactionReportsPRR 95% CI · ROR · χ²/pEBGM EB05 · IC025Label screenSerious-only & strataTrial cross-check
Platelet count decreased4,02535.9
34.9–36.9ROR 43.3 · χ² 131,957 / p <1e-300
34.6 EB05 33.7 · IC025 +5.1
3/3 methods agree
Labeled — boxed warning
synonym match
serious PRR 25.0NCT00351468: 3/302 (1.0%) on Eltrombopag Olamine (serious AE)
Death3,3403.6
3.4–3.7ROR 4.0 · χ² 6,375 / p <1e-300
3.5 EB05 3.4 · IC025 +1.8
3/3 methods agree
Outcome field, not a reaction
boxed warning mentions mortality
serious PRR 3.1NCT00351468: 1/302 (0.3%) on Eltrombopag Olamine (serious AE)
Drug ineffective (drug did not work)1,9681.4
1.3–1.4ROR 1.4 · χ² 207 / p 3e-47
1.4 EB05 1.3 · IC025 +0.4Reporting / coding artifactserious PRR 2.1not reported in cached trials
Fatigue (tiredness)1,1301.3
1.3–1.4ROR 1.3 · χ² 96 / p 5e-23
1.3 EB05 1.3 · IC025 +0.3Labeled adverse reaction
exact term
serious PRR 1.1NCT00351468: 4/302 (1.3%) on Eltrombopag Olamine
Platelet count increased1,11285.1
80.1–90.4ROR 89.4 · χ² 84,418 / p <1e-300
77.7 EB05 74.0 · IC025 +6.1
3/3 methods agree
Lab value / disease markerserious PRR 51.7 · 74% consumerNCT00351468: 3/302 (1.0%) on Eltrombopag Olamine (serious AE)
Headache9921.4
1.4–1.5ROR 1.5 · χ² 142 / p 5e-33
1.4 EB05 1.4 · IC025 +0.4Labeled adverse reaction
exact term
serious PRR 1.4NCT00351468: 1/302 (0.3%) on Eltrombopag Olamine (serious AE)
Off label use (used outside approved label)9401.0
0.9–1.1ROR 1.0 · χ² 0 / p 0.391
1.0 EB05 0.9 · IC025 -0.1
PRR-only: not supported by EBGM or IC
Reporting / coding artifactserious PRR 1.4not reported in cached trials
Nausea8251.0
0.9–1.0ROR 1.0 · χ² 2 / p 0.099
1.0 EB05 0.9 · IC025 -0.2
PRR-only: not supported by EBGM or IC
Labeled adverse reaction
exact term
serious PRR 0.8NCT00351468: 1/302 (0.3%) on Eltrombopag Olamine
Diarrhoea (diarrhea)8121.2
1.1–1.2ROR 1.2 · χ² 17 / p 2e-5
1.2 EB05 1.1 · IC025 +0.1Labeled adverse reaction
exact term
serious PRR 0.9NCT00351468: 1/302 (0.3%) on Eltrombopag Olamine (serious AE)
Product use in unapproved indication7432.8
2.6–3.0ROR 2.8 · χ² 857 / p 1e-188
2.8 EB05 2.6 · IC025 +1.4
3/3 methods agree
Reporting / coding artifactserious PRR 4.6not reported in cached trials
Malaise (feeling unwell)5991.2
1.2–1.3ROR 1.3 · χ² 30 / p 3e-8
1.2 EB05 1.2 · IC025 +0.2Not in label — unassessedserious PRR 1.2 · 78% consumernot reported in cached trials
Thrombocytopenia (low platelets)5984.9
4.6–5.3ROR 5.0 · χ² 1,867 / p <1e-300
4.9 EB05 4.6 · IC025 +2.2
3/3 methods agree
Labeled — boxed warning
exact term
serious PRR 4.3NCT00351468: 1/302 (0.3%) on Eltrombopag Olamine (serious AE)
Pyrexia (fever)5651.5
1.4–1.6ROR 1.5 · χ² 93 / p 3e-22
1.5 EB05 1.4 · IC025 +0.4Labeled adverse reaction
exact term
serious PRR 1.4NCT00351468: 1/302 (0.3%) on Eltrombopag Olamine (serious AE)
Asthenia (weakness)5421.3
1.2–1.4ROR 1.3 · χ² 42 / p 4e-11
1.3 EB05 1.2 · IC025 +0.3Labeled adverse reaction
exact term
serious PRR 1.2not reported in cached trials
Contusion5114.9
4.5–5.3ROR 5.0 · χ² 1,572 / p <1e-300
4.8 EB05 4.5 · IC025 +2.1
3/3 methods agree
Not in label — unassessedserious PRR 5.5NCT00351468: 1/302 (0.3%) on Eltrombopag Olamine (serious AE)

Unlabeled candidate signals

These flagged terms were not found in the FDA label text and do not match an artifact pattern. They are the pairs that would merit a structured assessment (temporality, dose-response, biological plausibility, consistency across databases, trial or cohort evidence). The screen has not done that; string-matching misses label wording, and a strong PRR can still be stimulated reporting, co-medication, or the disease itself.

Want to assess one of these properly? The runbook describes the Bradford Hill / trial-evidence workflow used on the assessment page, and handoff_top1000_signals.csv lists the strongest unassessed pairs across all drugs.

Common questions

What are the most reported side effects of Eltrombopag Olamine?

In FDA FAERS, the most frequently co-reported reaction terms for Eltrombopag Olamine are platelet count decreased, fatigue, platelet count increased, headache, nausea, diarrhoea. These are report counts, not rates: FAERS has no denominator, reporting is voluntary and uneven, and a term can be reported because of the illness being treated rather than the drug.

Does Eltrombopag Olamine have an FDA boxed warning?

Yes. The current FDA label carries a boxed warning: RISK FOR HEPATIC DECOMPENSATION IN PATIENTS WITH CHRONIC HEPATITIS C and RISK OF HEPATOTOXICITY. THESE HIHGLIGHTS DO NOT INCLUDE ALL THE INFORMATION NEEDED TO USE WARNING: RISK FOR HEPATIC DECOMPENSATION IN PATIENTS WITH CHRONIC HEPATITIS C and RISK OF HEPATOTOXICITY See full prescribing information for complete boxed warning.

Do FAERS signals prove that Eltrombopag Olamine causes these side effects?

No. A disproportionality signal (PRR, ROR) means a reaction is reported more often with this drug than with others in the database. That can reflect a real effect, but also the disease being treated, stimulated reporting after news or litigation, co-medications, or how reports are coded. Causality needs temporality, dose-response, biological plausibility, consistency across data sources and, ideally, trial or cohort evidence. This page screens each term against the FDA label and ClinicalTrials.gov results; it does not establish causation.

Sources & methods

Page generated 2026-10-08. Label and PubChem text are retrieved automatically and may lag the current label; always check the current prescribing information. OpenPV is a beta research tool of the Open Source Medicine Foundation.