Immune Thrombocytopenia

An autoimmune disorder characterized by low platelet counts (<100,000/μL) due to immune-mediated platelet destruction and impaired production. Causes increased bleeding risk. Previously called idiopathic thrombocytopenic purpura (ITP).

Quick Answer

What it is

An autoimmune disorder characterized by low platelet counts (<100,000/μL) due to immune-mediated platelet destruction and impaired production. Causes increased bleeding risk.

Key findings

  • Grade A: Durable Platelet Response (Romiplostim (Nplate))
  • Grade A: Overall Platelet Response (Romiplostim (Nplate))
  • Grade A: Long-term Efficacy (Romiplostim (Nplate))

Safety

  • Causes increased bleeding risk.
  • Safe long-term with no increased thrombosis or malignancy risk.
ℹ️ Quick Facts

Quick Facts: Immune Thrombocytopenia

  • Supplements Studied:1
1 supps · 4 outcomes

Detailed Outcomes

A
Durable Platelet Response
Phase 3: 38% durable response (≥50,000/μL for ≥6 of last 8 weeks) in splenectomized vs 0% placebo (P=0.0013). 52% durable response in pediatric patients vs 10% placebo (P=0.002, OR 9.1).
largeImproves
A
Overall Platelet Response
Phase 3: 88% non-splenectomized and 79% splenectomized achieved platelet response vs 14% and 0% placebo (P<0.0001). Mean 13.8 weeks with platelets ≥50,000/μL vs 0.8 weeks placebo.
largeImproves
A
Long-term Efficacy
5-year extension: 95% achieved platelet response at least once. Platelet response maintained at median 92% of visits. Stable doses (mean 5-8 μg/kg) with platelets 50-200,000/μL throughout.
largeImproves
A
Bleeding Reduction
Reduced bleeding events vs placebo. Lower rescue medication use. Decreased need for concurrent ITP therapies. Safe long-term with no increased thrombosis or malignancy risk.
largeImproves

Research Citations (58)

Role of thrombopoietin receptor agonists in chemotherapy-induced thrombocytopenia: A meta-analysis.
(2025)
PMID: 38155484
Chemotherapy-induced thrombocytopenia: modern diagnosis and treatment.
(2025)
PMID: 40040262
Safety analysis of romiplostim, eltrombopag, and avatrombopag post-market approval: a pharmacovigilance study based on the FDA Adverse Event Reporting System.
(2025)
PMID: 40016824
Safety, efficacy, and treatment satisfaction in adults with ITP who switched to avatrombopag from another TPO-RA.
(2025)
PMID: 40101243
Comparative efficacy and safety of rhTPO, romiplostim, and eltrombopag in the treatment of pediatric primary immune thrombocytopenia: a systematic review and network meta-analysis.
(2025)
PMID: 40547032
Predictive factors of romiplostim response in patients with refractory aplastic anemia: data from two clinical trials.
(2025)
PMID: 40593138
Romiplostim with ciclosporin A in patients with aplastic anaemia naïve to immunosuppressive therapy: A phase 2/3 study.
(2025)
PMID: 40639944
Romiplostim in primary immune thrombocytopenia that is persistent or chronic: phase III multicenter, randomized, placebo-controlled clinical trial in China
(2024)
PMID: 37601010
Romiplostim in chemotherapy-induced thrombocytopenia: A review of the literature.
(2024)
PMID: 39135303
Immune thrombocytopenia and pregnancy: challenges and opportunities in diagnosis and management.
(2024)
PMID: 39105265