A possible increased risk of metamizole-associated neutropenia among COVID-19 patients

Br J Clin Pharmacol. 2021 Jul;87(7):2902-2906. doi: 10.1111/bcp.14703. Epub 2021 Jan 7.

Abstract

Metamizole is commonly used as analgesic and antipyretic drug. The use of metamizole is prohibited in several countries due to its rare side effect of neutropenia and even agranulocytosis. Among the many symptoms of COVID-19, fever and diffuse pain predominant and therefore it can be assumed that metamizole may be widely used in the current epidemic period. So far, there have been no reports on the safety of metamizole in COVID-19 patients. We describe a series of 3 patients who developed severe neutropenia under metamizole treatment, raising a concern of a possible increased risk of this side effect among COVID-19 patients.

Keywords: COVID-19; SARS-CoV-2; adverse drug reaction; agranulocytosis; dipyrone; metamizole; neutropenia.

MeSH terms

  • Anti-Inflammatory Agents, Non-Steroidal / adverse effects
  • COVID-19*
  • Dipyrone / adverse effects
  • Humans
  • Neutropenia* / chemically induced
  • Neutropenia* / epidemiology
  • SARS-CoV-2

Substances

  • Anti-Inflammatory Agents, Non-Steroidal
  • Dipyrone