What the FDA labels say about taking them together
Etravirine and quinidine
Etravirine's FDA label of August 15, 2023 names quinidine in its drug interactions section; the quinidine label PlainMeds reads does not name etravirine. The etravirine label: “Concentrations of these antiarrhythmics may be decreased when co-administered with INTELENCE. INTELENCE and antiarrhythmics should be co-administered with caution. …”
Check it at the source: the etravirine FDA label on DailyMed (effective August 15, 2023, Janssen Products LP); the quinidine FDA label on DailyMed (effective February 1, 2018, Sun Pharmaceutical Industries, Inc.).
What does the etravirine label say about quinidine?
Etravirine label, drug interactionsConcomitant Drug Class/Drug Name: amiodarone bepridil disopyramide flecainide lidocaine (systemic) mexiletine propafenone quinidine; Effect on Concentration of Etravirine or Concomitant Drug: ↓ antiarrhythmics; Clinical Comment: Concentrations of these antiarrhythmics may be decreased when co-administered with INTELENCE. INTELENCE and antiarrhythmics should be co-administered with caution. Drug concentration monitoring is recommended, if available.
Source: FDA drug label (Intelence), Janssen Products LP, effective August 15, 2023 (SPL set 6a9cbc29-9f15-4b24-8d86-206b82887f3d), via openFDA; the full label on DailyMed
What does the quinidine label say about etravirine?
Quinidine's label (effective February 1, 2018) does not name etravirine in these sections. A label lists what its studies and reports found; it is not a complete list.
Source: FDA drug label (Quinidine Gluconate), Sun Pharmaceutical Industries, Inc., effective February 1, 2018 (SPL set 5023f053-fcc4-4c2c-aa59-9ec198ad185e), 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
| Etravirine | Quinidine | |
|---|---|---|
| Labeled for | HIV | Atrial fibrillation |
| Boxed warning | No | Yes |
| Pharmacy cost (NADAC) | $9.94 per tablet 200 mg tablet | $4.92 per tablet 324 mg tablet |
| Shortage now | A presentation being discontinued | 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