Drug interactions
Chlorothiazide + Succinylcholine
Severity: Moderate
Chlorothiazide 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
Chlorothiazide causes renal potassium loss and hypokalemia, which can alter the response to neuromuscular blockers and raise the risk of arrhythmia during anesthesia. Succinylcholine itself raises potassium transiently, so the net effect is hard to predict.
What this interaction means in plain words
Chlorothiazide 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.
Chlorothiazide belongs to Cardiovascular; Succinylcholine belongs to Musculoskeletal.
Why it happens
Thiazide-induced potassium and electrolyte depletion alters neuromuscular excitability and opposes the potassium rise from succinylcholine.
What to do
Check serum potassium and magnesium before surgery and correct deficits. 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 Chlorothiazide
Frequently asked questions
Can I take Chlorothiazide with Succinylcholine?
MediHelp rates the interaction as moderate. Chlorothiazide 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. Chlorothiazide causes renal potassium loss and hypokalemia, which can alter the response to neuromuscular blockers and raise the risk of arrhythmia during anesthesia. Succinylcholine itself raises potassium transiently, so the net effect is hard to predict.
How serious is the interaction between Chlorothiazide 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 serum potassium and magnesium before surgery and correct deficits. 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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