What the FDA labels say about taking them together
Dextran 40 and remimazolam
Remimazolam's FDA label of February 20, 2025 names dextran 40 in its contraindications section; the dextran 40 label PlainMeds reads does not name remimazolam. The remimazolam label: “CONTRAINDICATIONS BYFAVO is contraindicated in patients with a history of severe hypersensitivity reaction to dextran 40 or products containing dextran 40.”
Check it at the source: the dextran 40 FDA label on DailyMed (effective May 22, 2026); the remimazolam FDA label on DailyMed (effective February 20, 2025, Acacia Pharma, Ltd.).
What does the dextran 40 label say about remimazolam?
Dextran 40's label (effective May 22, 2026) does not name remimazolam in these sections. A label lists what its studies and reports found; it is not a complete list.
Source: FDA drug label (LMD in Dextrose), Hospira, Inc., effective May 22, 2026 (SPL set 3c273512-84e2-2cea-b201-12345a6bd1fe), via openFDA; the full label on DailyMed
What does the remimazolam label say about dextran 40?
Remimazolam label, contraindicationsCONTRAINDICATIONS BYFAVO is contraindicated in patients with a history of severe hypersensitivity reaction to dextran 40 or products containing dextran 40 [see Warnings and Precautions (5.3) ].
Remimazolam label, warnings and precautionsHypersensitivity Reactions BYFAVO contains dextran 40, which can cause hypersensitivity reactions, including rash, urticaria, pruritus, and anaphylaxis.
Source: FDA drug label (BYFAVO), Acacia Pharma, Ltd., effective February 20, 2025 (SPL set 4e1838f2-b999-41a7-a761-d94f09aa531f), 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
| Dextran 40 | Remimazolam | |
|---|---|---|
| Labeled for | Blood clots (DVT and PE) | n/a |
| Boxed warning | No | Yes |
| Pharmacy cost (NADAC) | n/a | 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