Favitab 400 Tablet is an antiviral medicine. It is used for the treatment of mild to moderate coronavirus disease (COVID-19) in adults. It stops the virus from multiplying and therefore, decreases the viral load in the body. Take Favitab 400 Tablet only as per the dose and duration suggested by your doctor. Do not self-medicate. The most common side effects of this medicine include the increased uric acid levels in blood, diarrhea, decreased white blood cell count (neutrophils), and increased liver enzymes. If any of these side effects bother you, consult with your doctor. To make sure it is safe for you, you should let your doctor know if you have severe kidney or liver disease before taking this medicine. Favitab 400 Tablet is not recommended for women who are pregnant, suspected to be pregnant or breastfeeding, as it can cause harmful effects to the developing baby. Also, inform your doctor if you have a history of hypersensitivity to this drug, have abnormalities in uric acid metabolism, or have gout.