Connecting Hydroxychloroquine In Vitro Antiviral Activity to In Vivo Concentration for Prediction of Antiviral Effect: A Critical Step in Treating Patients With Coronavirus Disease 2019

Clin Infect Dis. 2020 Dec 15;71(12):3232-3236. doi: 10.1093/cid/ciaa623.


Translation of in vitro antiviral activity to the in vivo setting is crucial to identify potentially effective dosing regimens of hydroxychloroquine. In vitro 50%/90% maximal effective concentration values for hydroxychloroquine should be compared to the in vivo free extracellular tissue concentration, which is similar to the free plasma hydroxychloroquine concentration.

Keywords: COVID-19; SARS-CoV-2; antiviral activity; hydroxychloroquine.

MeSH terms

  • Antiviral Agents* / therapeutic use
  • COVID-19 Drug Treatment*
  • Humans
  • Hydroxychloroquine*
  • SARS-CoV-2


  • Antiviral Agents
  • Hydroxychloroquine