Drug interactions
Metolazone + Succinylcholine
Severity: Moderate
Metolazone 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
Metolazone commonly causes hypokalemia, hypomagnesemia and hyponatremia, which can alter neuromuscular blockade and increase arrhythmia risk. Succinylcholine adds a transient potassium rise. The net effect is variable.
What this interaction means in plain words
Metolazone 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.
Metolazone belongs to Cardiovascular; Succinylcholine belongs to Musculoskeletal.
Why it happens
Diuretic-induced electrolyte depletion alters neuromuscular and cardiac excitability, opposing succinylcholine-induced potassium release.
What to do
Check and correct potassium, magnesium and sodium before elective procedures. Monitor ECG and neuromuscular function.
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 Succinylcholine
Other interactions of Metolazone
Frequently asked questions
Can I take Metolazone with Succinylcholine?
MediHelp rates the interaction as moderate. Metolazone 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. Metolazone commonly causes hypokalemia, hypomagnesemia and hyponatremia, which can alter neuromuscular blockade and increase arrhythmia risk. Succinylcholine adds a transient potassium rise. The net effect is variable.
How serious is the interaction between Metolazone 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: Check and correct potassium, magnesium and sodium before elective procedures. Monitor ECG and neuromuscular function.
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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