Drug interactions
Pyridostigmine + Succinylcholine
Severity: Major
Pyridostigmine and Succinylcholine: major interaction.
Last updated
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
Pyridostigmine inhibits cholinesterases, including plasma cholinesterase, and can prolong succinylcholine action. In myasthenia gravis patients, responses to depolarizing and nondepolarizing blockers are also unpredictable. This may result in prolonged paralysis.
What this interaction means in plain words
Pyridostigmine 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.
Pyridostigmine belongs to Central Nervous System; Succinylcholine belongs to Musculoskeletal.
Why it happens
Cholinesterase inhibition slows succinylcholine hydrolysis and increases acetylcholine at the neuromuscular junction.
What to do
Alert the anesthesia team and monitor neuromuscular function with a nerve stimulator, using reduced doses where appropriate. Have ventilatory support available.
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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Other interactions of Succinylcholine
Other interactions of Pyridostigmine
Frequently asked questions
Can I take Pyridostigmine with Succinylcholine?
MediHelp rates the interaction as major. Pyridostigmine 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. Pyridostigmine inhibits cholinesterases, including plasma cholinesterase, and can prolong succinylcholine action. In myasthenia gravis patients, responses to depolarizing and nondepolarizing blockers are also unpredictable. This may result in prolonged paralysis.
How serious is the interaction between Pyridostigmine 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: Alert the anesthesia team and monitor neuromuscular function with a nerve stimulator, using reduced doses where appropriate. Have ventilatory support available.
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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