Drug interactions
Magnesium + Succinylcholine
Severity: Moderate
Magnesium and Succinylcholine: moderate 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
Parenteral magnesium sulfate may prolong or intensify succinylcholine neuromuscular blockade. The effect is variable but can delay recovery of respiratory muscle function.
What this interaction means in plain words
Magnesium and Succinylcholine can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Magnesium belongs to Gastrointestinal Tract; Succinylcholine belongs to Musculoskeletal.
Why it happens
Magnesium decreases acetylcholine release and end-plate sensitivity, augmenting neuromuscular blockade.
What to do
Monitor neuromuscular function with train-of-four and be prepared for prolonged ventilatory support. Titrate the succinylcholine dose conservatively.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Magnesium
- Ciprofloxacin + Magnesium Major
- Magnesium + Pancuronium Major
- Magnesium + Rocuronium Major
- Magnesium + Vecuronium Major
- Amikacin + Magnesium Moderate
- Amphotericin b deoxycholate + Magnesium Moderate
Other interactions of Succinylcholine
Frequently asked questions
Can I take Magnesium with Succinylcholine?
MediHelp rates the interaction as moderate. Magnesium and Succinylcholine can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Parenteral magnesium sulfate may prolong or intensify succinylcholine neuromuscular blockade. The effect is variable but can delay recovery of respiratory muscle function.
How serious is the interaction between Magnesium and Succinylcholine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor neuromuscular function with train-of-four and be prepared for prolonged ventilatory support. Titrate the succinylcholine dose conservatively.
What other medicines interact with Magnesium?
MediHelp also lists interactions of Magnesium with, for example, Ciprofloxacin, Pancuronium, Rocuronium. The full list is on the Magnesium page.
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