Periodic paralysis (PP) is a muscle disease in the family of diseases called channelopathies, manifested by episodes of painless muscle weakness. These episodes may be precipitated by heavy exercise, fasting, or high-carbohydrate meals. PP is classified as hypokalemic when episodes occur in association with low potassium blood levels or as hyperkalemic when episodes can be induced by elevated potassium. Most cases of PP are hereditary, usually with an autosomal dominant inheritance pattern. Acquired cases of hypokalemic PP have been described in association with hyperthyroidism