What the FDA labels say about taking them together
Nevirapine and ritonavir
Nevirapine's FDA label of July 15, 2026 names ritonavir in its drug interactions section; the ritonavir label PlainMeds reads does not name nevirapine. The nevirapine label: “Do not co-administer nevirapine with atazanavir because nevirapine substantially decreases atazanavir exposure and there is a potential risk for nevirapine-associated toxicity due to increased nevirapine exposures.”
Check it at the source: the nevirapine FDA label on DailyMed (effective July 15, 2026, Mylan Pharmaceuticals Inc.); the ritonavir FDA label on DailyMed (effective July 23, 2026, AbbVie Inc.).
What does the nevirapine label say about ritonavir?
Nevirapine label, drug interactionsDrug Name: Atazanavir/Ritonavir The interaction between nevirapine and the drug was evaluated in a clinical study. All other drug interactions shown are predicted.; Effect on Concentration of Nevirapine or Concomitant Drug: ↓ Atazanavir ↑ Nevirapine; Clinical Comment: Do not co-administer nevirapine with atazanavir because nevirapine substantially decreases atazanavir exposure and there is a potential risk for nevirapine-associated toxicity due to increased nevirapine exposures.
Source: FDA drug label (Nevirapine), Mylan Pharmaceuticals Inc., effective July 15, 2026 (SPL set c6e93829-7024-48f6-8023-da6ff27dfc0a), via openFDA; the full label on DailyMed
What does the ritonavir label say about nevirapine?
Ritonavir's label (effective July 23, 2026) does not name nevirapine in these sections. A label lists what its studies and reports found; it is not a complete list.
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
| Nevirapine | Ritonavir | |
|---|---|---|
| Labeled for | HIV | HIV |
| Boxed warning | Yes | Yes |
| Pharmacy cost (NADAC) | $0.147 per tablet 200 mg tablet | $0.607 per tablet 100 mg tablet |
| Shortage now | No current entry | 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