What the FDA labels say about taking them together
Fosamprenavir and nevirapine
Fosamprenavir's FDA label of September 15, 2023 names nevirapine in its drug interactions section, and nevirapine's label names fosamprenavir too. The fosamprenavir label: “Coadministration of nevirapine and fosamprenavir without ritonavir is not recommended.”
Check it at the source: the fosamprenavir FDA label on DailyMed (effective September 15, 2023, Mylan Pharmaceuticals Inc.); the nevirapine FDA label on DailyMed (effective July 15, 2026, Mylan Pharmaceuticals Inc.).
What does the fosamprenavir label say about nevirapine?
Fosamprenavir label, drug interactionsConcomitant Drug Class/Drug Name: Non-nucleoside reverse transcriptase inhibitor: Nevirapine; Effect on Concentration of Amprenavir or Concomitant Drug: Fosamprenavir: ↓ Amprenavir ↑ Nevirapine; Clinical Comment: Coadministration of nevirapine and fosamprenavir without ritonavir is not recommended.
Source: FDA drug label (Fosamprenavir Calcium), Mylan Pharmaceuticals Inc., effective September 15, 2023 (SPL set 3a1424d8-844c-4e24-9ebd-b2c2b61b61a3), via openFDA; the full label on DailyMed
What does the nevirapine label say about fosamprenavir?
Nevirapine label, drug interactionsDrug Name: Fosamprenavir; Effect on Concentration of Nevirapine or Concomitant Drug: ↓ Amprenavir ↑ Nevirapine; Clinical Comment: Co-administration of nevirapine and fosamprenavir without ritonavir is not recommended.
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
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
| Fosamprenavir | Nevirapine | |
|---|---|---|
| Labeled for | HIV | HIV |
| Boxed warning | No | Yes |
| Pharmacy cost (NADAC) | n/a | $0.147 per tablet 200 mg tablet |
| Shortage now | No current entry | No current entry |
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