Remdesivir (GS-5734) is a nucleoside analog, a broad-spectrum antiviral compound that exerts its activity by inhibiting the RNA-dependent RNA polymerase of viruses. Remdesivir is active against Ebola, SARS, and MERS viruses, and is potentially therapeutic against COVID-19.

EIDD-1931 (Beta-d-N4-hydroxycytidine) is a ribonucleoside analog with antiviral activity that inhibits the replication of severe acute respiratory syndrome coronavirus [SARS-CoV] in Vero 76 cells, Middle East respiratory syndrome coronavirus [MERS-CoV] in Calu-3 2B4 cells, and SARS-CoV-2 in Vero cells (IC50s = 0.1, 0.15, and 0.3 μM, respectively).

Umifenovir hydrochloride (Arbidol HCl) , an broad-spectrum antiviral chemical agent, can inhibit cell invade of enveloped viruses by blocking viral fusion with host cell membrane.

PF-07321332 is a potent and orally active inhibitor of SARS-CoV 3C-like protease (3CLPRO) .

Favipiravir is a potent and selective RNA-dependent RNA polymerase inhibitor for the treatment of influenza virus infections.

Ritonavir (ABT 538) is a peptidomimetic agent that inhibits both HIV-1 and HIV-2 proteases. Ritonavir is highly inhibited by serum proteins but boosts the effect of other HIV proteases by blocking their degradation by cytochrome P450.

Andrographolide (Andrographis)(Andrographis), an irreversible antagonist of NF-κB, has anti-inflammatory and anti-platelet aggregation activities and potential antineoplastic.

Bromhexine hydrochloride (Bisolvon) is a mucolytic agent used in the treatment of respiratory disorders associated with viscid or excessive mucus.