Scimago Lab
powered by Scopus
call: +1.631.470.9640
Mon-Fri 10 am - 2 pm EST


Medical Science Monitor Basic Research


eISSN: 1643-3750

Get your full text copy in PDF

A prospective study of the incidence of agranulocytosis and aplastic anemia associated with the oral use of metamizole sodium in Poland

Stanisław Maj, Piotr Centkowski

Med Sci Monit 2004; 10(9): PI93-95

ID: 11765

Background:Metamizole is a common analgesic and antipyretic drug. However, its use has been associated with a risk of side-effects involving agranulocytosis and aplastic anemia. These reactions are rare and unpredictable. The aim of this prospective study was to evaluate the risks of these complications in Poland, where this medication is available without prescription.Material/Methods: Six hematological centers, serving approximately 40% (ca. 15 million people) of the country’s population, participated in the study. All cases of agranulocytosis and aplastic anemia were recorded and their severity and association with the use of drugs, especially metamizole sodium, were evaluated. All the patients receiving cytostatic or immunosupressive drugs were excluded.Results: During the 12 months of the study, 2 cases of aplastic anemia and no cases of agranulocytosis were confirmed which may have been associated with the use of metamizole. Overall, we recorded 16 cases of agranulocytosis and 27 cases of aplastic anemia. The two cases of metamizole sodium-induced aplastic anemia were non-fatal in character.Conclusions: Considering the consumption of 112,300,094 tablets of metamizole in Poland a year, the figures obtained result in an incidence of 0.25 cases of aplastic anemia per 1 million persons per day of treatment; this value being less than that for other nonsteroidal anti-inflammatory drugs. Nevertheless, caution is recommended in the application of metamizole, particularly over long periods and in large doses.

This paper has been published under Creative Common Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) allowing to download articles and share them with others as long as they credit the authors and the publisher, but without permission to change them in any way or use them commercially.
I agree