If you want to know how Paxlovid works - its all about the 3CL protease inhibition. You were correct to point out the side effects are a concern. IN sept they used in combination with ritonavir to keep it in the blood longer. Why dis they do that. My bet is cardio toxicity. Do you know who else has a 3CL protease inhibitor that you can buy over the counter? Thats right Tollovid which is manufactured by Todos Medical - TOMDF.