Affiliations 

  • 1 Department of Pharmacology, Dr. S.N Medical College, Jodhpur, Rajasthan, India
  • 2 Department of Pharmacology, All India Institute of Medical Sciences, Jodhpur, Rajasthan, India
  • 3 Department of Pharmacognosy, BVM College of Pharmacy, Gwalior, India
  • 4 Department of Community and Family Medicine, All India Institute of Medical Sciences (AIIMS), Jodhpur, Rajasthan, India
  • 5 Department of Biochemistry, All India Institute of Medical Sciences (AIIMS), Jodhpur, Rajasthan, India
  • 6 The Unit of Community Medicine, Faculty of Medicine and Defence Health, National Defence University of Malaysia, Kuala Lumpur
  • 7 Family Medicine, Faculty of Medicine and Defence Health, National Defence University of Malaysia
  • 8 Department of Microbiology, Jahangirnagar University, Savar, Dhaka 1342, Bangladesh
  • 9 The Unit of Pharmacology, Faculty of Medicine and Defence Health, Universiti Pertahanan, Nasional Malaysia (National Defence University of Malaysia), Kuala Lumpur, Malaysia
  • 10 All India Institute of Medical Sciences (AIIMS), Jodhpur, Rajasthan, India
Infect Drug Resist, 2020;13:4427-4438.
PMID: 33364790 DOI: 10.2147/IDR.S287934

Abstract

Background: COVID-19 caused by SARS-CoV-2 virus emerged as an unprecedented challenge to discover effective drugs for its prevention and cure. Hyperinflammation-induced lung damage is one of the poor prognostic indicators causing a higher rate of morbidity and mortality of COVID-19 patients. Favipiravir, an antiviral drug, is being used for COVID-19 treatment, and we currently have limited information regarding its efficacy and safety. Thus, the present study was undertaken to evaluate the adverse drug events (ADEs) reported in the WHO pharmacovigilance database.

Methods: This study analyzed all suspected ADEs related to favipiravir reported from 2015. The reports were analyzed based on age, gender, and seriousness of ADEs at the System Organ Classification (SOC) level and the individual Preferred Term (PT) level.

Results: This study is based on 194 ADEs reported from 93 patients. Most frequent ADEs suspected to be caused by the favipiravir included increased hepatic enzymes, nausea and vomiting, tachycardia, and diarrhea. Severe and fatal ADEs occurred more frequently in men and those over the age of 64 years. Blood and lymphatic disorders, cardiac disorders, hepatobiliary disorders, injury poisoning, and procedural complications were more common manifestations of severe ADEs.

Conclusion: This study revealed that favipiravir appears to be a relatively safe drug. An undiscovered anti-inflammatory activity of favipiravir may explain the improvement in critically ill patients and reduce inflammatory markers. Currently, the data is based on very few patients. A more detailed assessment of the uncommon ADEs needs to be analyzed when more information will be available.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.