What the FDA labels say about taking them together
Prochlorperazine and quizartinib
Quizartinib's FDA label of April 16, 2026 names prochlorperazine in its drug interactions section; the prochlorperazine label PlainMeds reads does not name quizartinib. The quizartinib label: “… granisetron, azithromycin, pentamidine, doxycycline, moxifloxacin, atovaquone, prochlorperazine, and tacrolimus.”
Check it at the source: the prochlorperazine FDA label on DailyMed (effective January 27, 2026, GLENMARK PHARMACEUTICALS INC., USA); the quizartinib FDA label on DailyMed (effective April 16, 2026, Daiichi Sankyo Inc.).
What does the prochlorperazine label say about quizartinib?
Prochlorperazine's label (effective January 27, 2026) does not name quizartinib in these sections. A label lists what its studies and reports found; it is not a complete list.
Source: FDA drug label (PROCHLORPERAZINE MALEATE), GLENMARK PHARMACEUTICALS INC., USA, effective January 27, 2026 (SPL set 9c806152-70d0-43eb-b183-b51b12b82b31), via openFDA; the full label on DailyMed
What does the quizartinib label say about prochlorperazine?
Quizartinib label, drug interactionsQT Interval Prolonging Drugs Clinical Impact VANFLYTA prolongs the QT/QTc interval. Coadministration of VANFLYTA with other drugs that prolong the QT interval may further increase the incidence of QT prolongation [see Warnings and Precautions (5.1) and Clinical Pharmacology (12.2) ]. Prevention or Management Monitor patients more frequently with ECG if co-administration of VANFLYTA with drugs known to prolong the QT interval is required. Examples of QT prolonging drugs include but are not limited to antifungal azoles, ondansetron, granisetron, azithromycin, pentamidine, doxycycline, moxifloxacin, atovaquone, prochlorperazine, and tacrolimus.
Source: FDA drug label (VANFLYTA), Daiichi Sankyo Inc., effective April 16, 2026 (SPL set 29cdbcfe-497d-4e78-bb7b-2d4acafe8e86), 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
| Prochlorperazine | Quizartinib | |
|---|---|---|
| Labeled for | Nausea and vomiting, Schizophrenia, Anxiety | Leukemia, lymphoma and myeloma |
| Boxed warning | Yes | Yes |
| Pharmacy cost (NADAC) | $0.162 per tablet 10 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