Yes, it is good to be prepared.... and not all doctors or pharmacists are up on the latest drug interactions. Pfizer has a list of drug interactions with Paxlovid on their Internet site.
Back in February, one month after my lung cancer surgery and four months from third Pfizer vaccine shot, I tested positive for Covid despite my self-imposed isolation, curbside pickup and N95 mask. Just like they say, protection decreases over time! Anyway, I was very careful, and it still was not enough to avoid Covid. So not having guaranteed access to an antiviral is concerning when one is high risk of severe disease.
I did not have a fever, and just had a congested cough. Covid symptoms were the same as lung cancer and surgery. I couldn't believe I had Covid, but I did PCR test. I was given Merck Molnupiravir because Paxlovid out of stock. Molnupiravir did help my congested cough immediately, but Paxlovid is far more effective.