Glenmark Pharmaceuticals became the first Indian company to launch an antiviral drug named FabiFlu for the treatment of mild to moderate symptoms of COVID-19, the respiratory illness that has made over nine million people sick globally in just six months.
The medicinal salt in FabiFlu, which is available in tablet form, is currently undergoing various clinical trials with two studies showing positive outcomes in the treatment of the novel coronavirus infection, caused by the SARS-CoV-2 virus.
The Indian pharma company received approval for FabiFlu from the Drugs Controller General of India (DGCI) on Friday, 19 June.
Read more: Glenmark to begin human trials of a combination drug for COVID-19 in India
FabiFlu is derived from favipiravir, an antiviral drug that has already been available and approved to treat influenza in countries like Japan. According to the United States National Library of Medicine, "Favipiravir is a pyrazinecarboxamide derivative with activity against RNA viruses."
The SARS-CoV-2 virus is an RNA virus—meaning that the genetic material in the virus is RNA (instead of DNA).
Favipiravir has been in use since 2014 when it was first approved to treat new or re-emerging influenza outbreaks. The drug acts by blocking the activity of RNA polymerase, an enzyme, which is necessary for the replication of the virus in the body.
Glenmark Pharmaceuticals had gone into testing with a two-pronged strategy, testing the efficacy of favipiravir as a monotherapy as well as combining the drug with umifenovir, a drug that has been used prophylactically to treat influenza types A and B in countries like China and Russia.
The Russian ministry of health has included Avifavir, which is based on the active substance in favipiravir, as a nationally recommended drug for the treatment of COVID-19.