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Hyperthyroidism can lead to thyrotoxic periodic paralysis (TPP), an infrequent yet fatal complication. It leads to a drop in the levels of serum potassium which in turn causes episodes of muscle weakness. This condition is exceptionally associated with respiratory insufficiency and arrhythmias, making it fatal. We present a rare case of a young male presenting with quadriparesis and ventricular tachycardia. A thorough laboratory work confirmed diagnosis of thyrotoxicosis and hypokalemia. This case further strengthens that recognition of TPP well before time is critical for early initiation of treatment.