Quinine Sulphate (Medical Use)
for Muscle Cramps
Quinine sulphate is the most effective pharmacological treatment for nocturnal leg cramps but carries significant cardiac risks — it is now reserved for cases where cramps are severely impairing sleep despite other measures.
How it works
Reduces muscle spindle excitability and increases the refractory period of skeletal muscle, reducing spontaneous cramping. Exact mechanism not fully characterised.
What to watch for
Prescription only in Australia. Significant cardiac arrhythmia risk, drug interactions, and potential thrombocytopaenia. Only appropriate when nocturnal cramps are severely impairing quality of life after conservative measures fail. Requires medical supervision.
Community experience
Other remedies for Muscle Cramps
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