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Related Experiment Videos

Thrombocytopenia following sustained-release procainamide.

D J Meisner, R J Carlson, A J Gottlieb

    Archives of Internal Medicine
    |April 1, 1985
    PubMed
    Summary

    Procainamide hydrochloride can cause serious thrombocytopenia (low platelet count), particularly the sustained-release form. Platelet counts typically recover within a week after discontinuing the drug.

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    Area of Science:

    • Pharmacology
    • Hematology
    • Clinical Medicine

    Background:

    • Procainamide hydrochloride is an antiarrhythmic drug.
    • Drug-induced thrombocytopenia is a known but infrequent adverse reaction.
    • Previous reports of procainamide-induced thrombocytopenia are rare.

    Purpose of the Study:

    • To report cases of thrombocytopenia associated with sustained-release procainamide.
    • To characterize the clinical presentation, onset, and recovery of this adverse event.
    • To evaluate the efficacy of prednisone in managing this condition.

    Main Methods:

    • Retrospective case series.
    • Analysis of six patients who developed thrombocytopenia after receiving sustained-release procainamide.
    • Documentation of platelet counts, time to onset, time to recovery, and treatment interventions.

    Main Results:

    • Six cases of thrombocytopenia were identified.
    • Three patients had severe thrombocytopenia (<15,000/microL).
    • Mean onset was 40 days (range 9-71 days); mean recovery was 7.8 days (range 4-9 days) after drug cessation.
    • Oral prednisone showed limited benefit.
    • Thrombocytopenia was not linked to systemic lupus erythematosus.

    Conclusions:

    • Sustained-release procainamide can cause significant thrombocytopenia.
    • This adverse effect is reversible upon drug discontinuation.
    • Thrombocytopenia should be considered an important potential side effect of sustained-release procainamide therapy.

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