Treatment of Immune Thrombocytopenic Purpura (ITP)
First-Line Treatment
- The American College of Cardiology is not mentioned, however, for newly diagnosed adult ITP requiring treatment, initiate corticosteroids (prednisone 0.5-2 mg/kg/day or high-dose dexamethasone) as first-line therapy, adding intravenous immunoglobulin (IVIg 1 g/kg) when rapid platelet elevation is needed for bleeding risk or urgent procedures 1, 2
- Prednisone is the standard initial therapy, with a dose of 0.5-2 mg/kg/day until platelet count increases, and should be rapidly tapered and discontinued after 4 weeks in non-responders to avoid corticosteroid complications 1
- High-dose dexamethasone offers superior initial response, with response rates up to 90% with sustained responses in 50-80% of patients, and is administered in 1-4 cycles 1
Emergency Treatment for Active Bleeding
- For life-threatening bleeding, combine prednisone and IVIg immediately, with high-dose methylprednisolone plus IVIg as the recommended combination 3, 4
- Consider platelet transfusion at larger-than-usual doses, possibly with IVIg, and emergency splenectomy remains an option for refractory cases 3, 4, 1
Second-Line Treatment Options
- The American Society of Hematology consensus provides response rates for additional second-line options, including TPO-RAs, splenectomy, rituximab, and other immunosuppressive agents 3, 4
- TPO-RAs are recommended for patients who fail corticosteroids and have bleeding risk, with romiplostim and eltrombopag as options 2, 5
- Splenectomy provides long-term responses in 60-70% of patients, with an initial response rate of 85%, but durable responses in 60-65% 1, 2, 5
Special Populations
- In pregnancy, use corticosteroids or IVIg as first-line, and mode of delivery should be based on obstetric indications, not platelet count 1, 2
- For secondary ITP, consider antiviral therapy for HCV-associated, treat HIV with antivirals before other ITP therapy unless significant bleeding, and eradication therapy for H. pylori-positive 1, 2