What the FDA labels say about taking them together
Cisatracurium and quinidine
Cisatracurium's FDA label of April 4, 2025 names quinidine in its drug interactions section; the quinidine label PlainMeds reads does not name cisatracurium. The cisatracurium label: “DRUG INTERACTIONS Succinylcholine: May decrease time to onset of maximum neuromuscular blockade. I nhalational anesthetics, antibiotics, local anesthetics, magnesium salts, procainamide, lithium, quinidine:”
Check it at the source: the cisatracurium FDA label on DailyMed (effective April 4, 2025, Gland Pharma Limited); the quinidine FDA label on DailyMed (effective February 1, 2018, Sun Pharmaceutical Industries, Inc.).
What does the cisatracurium label say about quinidine?
Cisatracurium label, drug interactionsDRUG INTERACTIONS Succinylcholine: May decrease time to onset of maximum neuromuscular blockade. (7.1) I nhalational anesthetics, antibiotics, local anesthetics, magnesium salts, procainamide, lithium, quinidine:
Cisatracurium label, warnings and precautionsCertain drugs may enhance the neuromuscular blocking action of cisatracurium besylate injection including inhalational anesthetics, antibiotics, magnesium salts, lithium, local anesthetics, procainamide and quinidine [ see Drug Interactions (7.1 )].
Source: FDA drug label (Cisatracurium besylate), Gland Pharma Limited, effective April 4, 2025 (SPL set 0bacc37a-5e7f-4f05-9206-56fc8041c1ad), via openFDA; the full label on DailyMed
What does the quinidine label say about cisatracurium?
Quinidine's label (effective February 1, 2018) does not name cisatracurium 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
| Cisatracurium | Quinidine | |
|---|---|---|
| Labeled for | n/a | Atrial fibrillation |
| Boxed warning | No | Yes |
| Pharmacy cost (NADAC) | n/a | $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