Drug interactions
Pralidoxime + Succinylcholine
Severity: Major
Pralidoxime and Succinylcholine: major interaction.
Last updated Sources: US FDA label
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Pralidoxime can reactivate cholinesterase but may also inhibit it, and anticholinesterase poisoning itself reduces plasma cholinesterase, so succinylcholine effects can be prolonged. Prolonged paralysis has been reported in organophosphate poisoning treated with these agents.
What this interaction means in plain words
Pralidoxime and Succinylcholine can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Why it happens
Reduced plasma cholinesterase activity from organophosphate exposure and possible cholinesterase inhibition by pralidoxime slows succinylcholine metabolism.
What to do
Avoid succinylcholine in organophosphate poisoning if an alternative paralytic is available. If it is used, give a reduced dose and monitor neuromuscular recovery with ventilatory support.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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References
Other interactions of Succinylcholine
Frequently asked questions
Can I take Pralidoxime with Succinylcholine?
MediHelp rates the interaction as major. Pralidoxime and Succinylcholine can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Pralidoxime can reactivate cholinesterase but may also inhibit it, and anticholinesterase poisoning itself reduces plasma cholinesterase, so succinylcholine effects can be prolonged. Prolonged paralysis has been reported in organophosphate poisoning treated with these agents.
How serious is the interaction between Pralidoxime and Succinylcholine?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid succinylcholine in organophosphate poisoning if an alternative paralytic is available. If it is used, give a reduced dose and monitor neuromuscular recovery with ventilatory support.
What other medicines interact with Succinylcholine?
MediHelp also lists interactions of Succinylcholine with, for example, Amikacin, Bacitracin-neomycin-polymyxin, Capreomycin. The full list is on the Succinylcholine page.
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