Periodic paralysis - hyperkalemic
A medicine called acetazolamide prevents attacks in many cases. Thiazide diuretics such as hydrochlorothiazide are also effective and have fewer side effects than acetazolamide. A low potassium, high carbohydrate diet may also help prevent attacks, as may avoiding fasting, strenuous activity, or cold temperatures.
Barohn RJ. Muscle diseases. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 447.