Aripiprazole-Induced Hyponatremia Observed Upon Rechallenge: A Case Report.

Medications account for nearly two-thirds of all cases of syndrome of inappropriate antidiuretic hormone secretion (SIADH). Numerous psychotropics including antipsychotics have been associated with SIADH but it is difficult to show a causal relationship. We report a unique case where a patient developed hyponatremia and upon rechallenge with aripiprazole resulted in a second incidence. There is limited literature recognizing aripiprazole induced SIADH and especially any focused on medication rechallenge.