What the FDA labels say about taking them together
Pimozide and primaquine
Primaquine's FDA label of February 11, 2026 names pimozide in its drug interactions section; the pimozide label PlainMeds reads does not name primaquine. The primaquine label: “Increase monitoring for adverse reactions associated with CYP3A4 substrate drugs that prolong the QT interval (e.g., pimozide) or where minimal concentration changes may lead to serious adverse reactions when …”
Check it at the source: the pimozide FDA label on DailyMed (effective August 12, 2026, Par Health USA, LLC); the primaquine FDA label on DailyMed (effective February 11, 2026, Sanofi-Aventis U.S. LLC).
What does the pimozide label say about primaquine?
Pimozide's label (effective August 12, 2026) does not name primaquine in these sections. A label lists what its studies and reports found; it is not a complete list.
Source: FDA drug label (Pimozide), Par Health USA, LLC, effective August 12, 2026 (SPL set 70b079e2-a1f7-4a93-8685-d60a4d7c1280), via openFDA; the full label on DailyMed
What does the primaquine label say about pimozide?
Primaquine label, drug interactionsIncrease monitoring for adverse reactions associated with CYP3A4 substrate drugs that prolong the QT interval (e.g., pimozide) or where minimal concentration changes may lead to serious adverse reactions when concurrently administered with Primaquine phosphate Tablets.
Source: FDA drug label (Primaquine Phosphate), Sanofi-Aventis U.S. LLC, effective February 11, 2026 (SPL set 1bfbf4ae-81b8-4160-a00d-6322aadd4b59), 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
| Pimozide | Primaquine | |
|---|---|---|
| Labeled for | n/a | n/a |
| Boxed warning | No | No |
| Pharmacy cost (NADAC) | $1.23 per tablet 1 mg tablet | n/a |
| 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