Warfarin
It is known that warfarin has multiple drug-drug or drug-food interactions. However, there were no significant interactions between warfarin and remdesivir or HCLQ (Table 1). For patients initiating warfarin, international normalized ratio (INR) should be monitored every day until the therapeutic range (INR 2-3) is achieved. Thereafter, INR could be followed up when clinically indicated.