nirmatrelvir + ritonavir · Medicine question

How do the nirmatrelvir and ritonavir tablets in Paxlovid differ in colour and markings?

Name: How do the nirmatrelvir and ritonavir tablets in Paxlovid differ in colour and markings?
Published: 2026-11-08T01:58:50.005Z

iatroX medicinesPublished 8 November 2026

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In Paxlovid, nirmatrelvir tablets are pink and debossed with 'PFE' on one side and '3CL' on the other, while ritonavir tablets are white to off-white and debossed with 'H' on one side and 'R9' on the other.

Sources for this answer

Paxlovid 150 mg/100 mg film-coated tabletsPfizer Limited · emc · SmPC §3 Pharmaceutical form · Version 12Document updated 15 April 2026

Sources checked 8 November 2026

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