PAXLOVID = nirmatrelvir (an antiviral) + ritonavir (helps to boost the effect of nirmatrelvir) Each dose = 2 tablets of nirmatrelvir 150mg (pink tablets) + 1 tablet of ritonavir 100mg (white tablet) = total of 3 tablets. People with chronic kidney disease may be prescribed only two tablets per dose (1 tablet of nirmatrelvir and 1 tablet. • Nirmatrelvir/ritonavir (Paxlovid™) is generally well tolerated and most people experience mild side effects • Possible side effects may include*: *As this is a new medication, other side effects are possible and are still being identified Altered sense of taste Diarrhea Muscle aches High blood pressure Vomiting Headache.