What the FDA labels say about taking them together
Cyclophosphamide and succinylcholine
Cyclophosphamide's FDA label of January 19, 2026 names succinylcholine in its drug interactions section; the succinylcholine labels PlainMeds reads (2) do not name cyclophosphamide.
Check it at the source: the cyclophosphamide FDA label on DailyMed (effective January 19, 2026, Amneal Pharmaceuticals LLC); the succinylcholine FDA label on DailyMed (effective August 18, 2026, Hospira, Inc.).
What does the cyclophosphamide label say about succinylcholine?
Cyclophosphamide label, drug interactionsProlonged apnea may occur with concurrent depolarizing muscle relaxants (e.g., succinylcholine).
Source: FDA drug label (Cyclophosphamide), Amneal Pharmaceuticals LLC, effective January 19, 2026 (SPL set 520bfe39-dfd5-4a20-9a37-80078afded0d), via openFDA; the full label on DailyMed
What does the succinylcholine label say about cyclophosphamide?
Succinylcholine's label (effective August 18, 2026) and its 1 other brand-application label do not name cyclophosphamide in these sections. A label lists what its studies and reports found; it is not a complete list.
Source: FDA drug label (QUELICIN), Hospira, Inc., effective August 18, 2026 (SPL set fb08161e-7711-406d-e7b3-ea4515c07983), 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
| Cyclophosphamide | Succinylcholine | |
|---|---|---|
| Labeled for | Leukemia, lymphoma and myeloma | n/a |
| Boxed warning | No | Yes |
| Pharmacy cost (NADAC) | $1.67 per capsule 50 mg capsule | n/a |
| 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