Drug interactions
Pralidoxime chloride + Succinylcholine
Severity: Major
Pralidoxime chloride 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
Organophosphate poisoning inhibits cholinesterases, including plasma cholinesterase that breaks down succinylcholine, so paralysis can be markedly prolonged. Pralidoxime may restore enzyme activity but the effect on neuromuscular blockade is unpredictable. Prolonged apnea can result.
What this interaction means in plain words
Pralidoxime chloride 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 chloride belongs to Miscellaneous; Succinylcholine belongs to Musculoskeletal.
Why it happens
Cholinesterase inhibition reduces succinylcholine hydrolysis, prolonging depolarizing neuromuscular blockade.
What to do
Avoid succinylcholine in patients with organophosphate or anticholinesterase poisoning where possible, or use with ventilatory support and neuromuscular monitoring. Be prepared for prolonged mechanical ventilation.
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 Pralidoxime chloride
Other interactions of Succinylcholine
Frequently asked questions
Can I take Pralidoxime chloride with Succinylcholine?
MediHelp rates the interaction as major. Pralidoxime chloride 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. Organophosphate poisoning inhibits cholinesterases, including plasma cholinesterase that breaks down succinylcholine, so paralysis can be markedly prolonged. Pralidoxime may restore enzyme activity but the effect on neuromuscular blockade is unpredictable. Prolonged apnea can result.
How serious is the interaction between Pralidoxime chloride 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 patients with organophosphate or anticholinesterase poisoning where possible, or use with ventilatory support and neuromuscular monitoring. Be prepared for prolonged mechanical ventilation.
What other medicines interact with Pralidoxime chloride?
MediHelp also lists interactions of Pralidoxime chloride with, for example, Morphine, Theophylline, Atropine. The full list is on the Pralidoxime chloride page.
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