What the FDA labels say about taking them together
Darunavir and naloxegol
Darunavir's FDA label of August 29, 2025 names naloxegol in its contraindications section; the naloxegol label PlainMeds reads does not name darunavir. The darunavir label: “Co-administration of PREZISTA/ritonavir and naloxegol is contraindicated due to potential for precipitating opioid withdrawal symptoms.”
Check it at the source: the darunavir FDA label on DailyMed (effective August 29, 2025, Janssen Products LP); the naloxegol FDA label on DailyMed (effective September 1, 2026, Averitas Pharma, Inc.).
What does the darunavir label say about naloxegol?
Darunavir label, contraindicationsSt. John's wort ( Hypericum perforatum ) Hepatitis C direct acting antiviral: elbasvir/grazoprevir Lipid modifying agents: lomitapide, lovastatin, simvastatin Opioid Antagonist: naloxegol PDE-5 inhibitor: sildenafil when used for treatment of pulmonary arterial hypertension Sedatives/hypnotics: orally administered midazolam, triazolam Co-administration of PREZISTA/ritonavir is contraindicated with drugs that are highly dependent on CYP3A for clearance and for which elevated plasma concentrations are associated with serious and/or life-threatening events (narrow therapeutic index).
Darunavir label, drug interactionsConcomitant Drug Class Drug Name Examples: naloxegol; Effect on Concentration of Darunavir Or Concomitant Drug: ↑ naloxegol; Clinical Comment: Co-administration of PREZISTA/ritonavir and naloxegol is contraindicated due to potential for precipitating opioid withdrawal symptoms.
Source: FDA drug label (PREZISTA), Janssen Products LP, effective August 29, 2025 (SPL set 814301f9-c990-46a5-b481-2879a521a16f), via openFDA; the full label on DailyMed
What does the naloxegol label say about darunavir?
Naloxegol's label (effective September 1, 2026) does not name darunavir in these sections. A label lists what its studies and reports found; it is not a complete list.
Source: FDA drug label (MOVANTIK), Averitas Pharma, Inc., effective September 1, 2026 (SPL set 28596788-b73f-4247-85fc-3105f51fff5a), 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
| Darunavir | Naloxegol | |
|---|---|---|
| Labeled for | HIV | n/a |
| Boxed warning | No | No |
| Pharmacy cost (NADAC) | $1.16 per tablet 600 mg tablet | $14.61 per tablet 25 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