I saw my pain management doctor today for another problem I have. When I told him about my reduced pain after taking paxlovid he asked if I was taking anything else . I was also taking 500mg of naproxen twice a day. He said the paxlovid may have boosted the effectiveness of the naproxen. I think the ritonavir may have keep the naproxen in my system longer increasing its effectiveness. When I finished my paxlovid, I also stopped the naproxen a few days later, because I don’t like taking such a high dose. About a week later the pain came back.