What the FDA labels say about taking them together
Maraviroc and ritonavir
Maraviroc's FDA label of September 26, 2022 names ritonavir in its drug interactions section, and ritonavir's label names maraviroc too. The maraviroc label: “Coadministration with CYP3A inhibitors, including protease inhibitors, will increase the concentration of SELZENTRY.”
Check it at the source: the maraviroc FDA label on DailyMed (effective September 26, 2022, ViiV Healthcare Company); the ritonavir FDA label on DailyMed (effective July 23, 2026, AbbVie Inc.).
What does the maraviroc label say about ritonavir?
Maraviroc label, drug interactionsCoadministration with CYP3A inhibitors, including protease inhibitors (except tipranavir/ritonavir), will increase the concentration of SELZENTRY.
Source: FDA drug label (SELZENTRY), ViiV Healthcare Company, effective September 26, 2022 (SPL set 46f30ac5-c96b-429e-976d-8c5ee1c0761b), via openFDA; the full label on DailyMed
What does the ritonavir label say about maraviroc?
Ritonavir label, drug interactionsConcomitant Drug Class/Drug Name: HIV-1 CCR5 – antagonist: maraviroc; Effect on Concentration of Ritonavir or Concomitant Drug: ↑ maraviroc; Clinical Comment: See the complete prescribing information for maraviroc for details on co-administration of maraviroc and ritonavir-containing protease inhibitors.
Source: FDA drug label (Norvir), AbbVie Inc., effective July 23, 2026 (SPL set 2849298e-de6e-47bb-8194-56e075b33fc3), via openFDA; the full label on DailyMed
These are the labels' own sentences. PlainMeds does not grade interactions; a pharmacist or prescriber can say what they mean for one person's medicines.
Both medicines on the record
| Maraviroc | Ritonavir | |
|---|---|---|
| Labeled for | HIV | HIV |
| Boxed warning | Yes | Yes |
| Pharmacy cost (NADAC) | $9.15 per tablet 150 mg tablet | $0.607 per tablet 100 mg tablet |
| Shortage now | A presentation being discontinued | A presentation being discontinued |
Source: FDA NDC Directory, CMS NADAC of October 7, 2026 and the FDA Drug Shortage Database (FDA files October 8, 2026)
What next?
- Check more medicines together
- up to five at once