What the FDA labels say about taking them together
Naldemedine and verapamil
Naldemedine's FDA label of July 25, 2025 names verapamil in its drug interactions section; the verapamil labels PlainMeds reads (4) do not name naldemedine. The naldemedine label: “P-glycoprotein (P-gp) Inhibitors Clinical Impact Increase in plasma naldemedine concentrations Intervention Monitor for potential naldemedine-related adverse reactions. …”
Check it at the source: the naldemedine FDA label on DailyMed (effective July 25, 2025, BioDelivery Sciences International Inc); the verapamil FDA label on DailyMed (effective April 6, 2026, Zydus Pharmaceuticals (USA) Inc.).
What does the naldemedine label say about verapamil?
Naldemedine label, drug interactionsP-glycoprotein (P-gp) Inhibitors (e.g., amiodarone, captopril, cyclosporine, quercetin, quinidine, verapamil) Clinical Impact Increase in plasma naldemedine concentrations [see Clinical Pharmacology (12.3) ] Intervention Monitor for potential naldemedine-related adverse reactions [see Adverse Reactions (6.1) ]. Strong CYP3A inducers (e.g., rifampin): Decreased naldemedine concentrations; avoid concomitant use ( 7 ) Other opioid antagonists: Potential for additive effect and increased risk of opioid withdrawal; avoid concomitant use ( 7 ) Moderate (e.g., fluconazole) and strong (e.g., itraconazole) CYP3A4 inhibitors: Increased naldemedine concentrations; …
Source: FDA drug label (SYMPROIC), NDA208854 (Bdsi), as published by BioDelivery Sciences International Inc, effective July 25, 2025 (SPL set b1a1256c-a1eb-4abe-ab1e-30e4711afd16), via openFDA; the full label on DailyMed
What does the verapamil label say about naldemedine?
Verapamil's label (effective April 6, 2026) and its 3 other brand-application labels do not name naldemedine in these sections. A label lists what its studies and reports found; it is not a complete list.
Source: FDA drug label (Verapamil hydrochloride), Zydus Pharmaceuticals (USA) Inc., effective April 6, 2026 (SPL set e19ab8d8-dae5-489d-9805-7e7407bea06d), 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
| Naldemedine | Verapamil | |
|---|---|---|
| Labeled for | n/a | High blood pressure, Atrial fibrillation, Angina |
| Boxed warning | No | No |
| Pharmacy cost (NADAC) | $16.26 per tablet 0.2 mg tablet | $0.191 per tablet 180 mg tablet |
| Shortage now | No current entry | A presentation being discontinued |
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