What the FDA labels say about taking them together
Prazosin and verapamil
Verapamil's FDA label of April 6, 2026 names prazosin in its drug interactions section; the prazosin label PlainMeds reads does not name verapamil.
Check it at the source: the prazosin FDA label on DailyMed (effective March 6, 2026, Prasco Laboratories); the verapamil FDA label on DailyMed (effective April 6, 2026, Zydus Pharmaceuticals (USA) Inc.).
What does the prazosin label say about verapamil?
Prazosin's label (effective March 6, 2026) does not name verapamil in these sections. A label lists what its studies and reports found; it is not a complete list.
Source: FDA drug label (Prazosin Hydrochloride), NDA017442 (Pfizer), as published by Prasco Laboratories, effective March 6, 2026 (SPL set cbe89216-7dea-43d7-b12e-44ccfb69af3d), via openFDA; the full label on DailyMed
What does the verapamil label say about prazosin?
Verapamil label, drug interactionsSuch an effect was observed in one study following the concomitant administration of verapamil and prazosin.
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
| Prazosin | Verapamil | |
|---|---|---|
| Labeled for | High blood pressure | High blood pressure, Atrial fibrillation, Angina |
| Boxed warning | No | No |
| Pharmacy cost (NADAC) | $0.0842 per capsule 1 mg capsule | $0.191 per tablet 180 mg tablet |
| Shortage now | A presentation being discontinued | 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