Paxlovid contains two medicines: nirmatrelvir and ritonavir. Nirmatrelvir [PF-07321332] is a SARS-CoV-2 main protease (Mpro) inhibitor (also known as SARS-CoV2 3CL protease inhibitor) that works by inhibiting viral replication in the early stages of the disease to prevent progression to severe COVID-19.
