<prompt> Carbamazepine in elderly patient can causeHyponatremiaHypokalemiaHyperkalemiaHypernatremia  <response>: - Carbamazepine DOC for focal seizures DOC for trigeminal neuralgia Used for Diabetes insipidus Bipolar disorder Adverse effect - Release of ADH leading to dilutional hyponatremia, Agranulocytosis, Aplastic anaemia 