Impact of Abrupt Interruption of Home Psychotropic Medications at ICU Admission.

Abrupt discontinuation of home psychotropic medications is common among critically ill patients but may precipitate clinically significant withdrawal. To determine the percent of patients with interruptions in home psychotropic medications upon intensive care unit (ICU) admission and to identify outcomes associated with these interruptions. This was an institutional review board-approved, single-center, retrospective study of critically ill patients with a history of mental illness taking an antipsychotic or antidepressant medication. The primary outcome was the percent of patients with interruption in at least one home psychotropic medication for ≥24 hours upon ICU admission. Secondary outcomes included time to psychotropic re-initiation, percent of home psychotropic medications restarted in the ICU, ICU length of stay (LOS), delirium, withdrawal-related complications, need for acute antipsychotics or benzodiazepines, and reasons for psychotropic interruption. Among 183 patients, 93 (50.8%) had interruptions in home psychotropic therapy for ≥24 hours upon ICU admission. Mean time to reinitiation of at least one psychotropic agent was 1.4 days, and 16.4% of patients did not have any home psychotropics restarted. Patients with psychotropic interruption had a longer ICU LOS ( = 0.01) and greater incidence of ICU delirium ( < 0.01). Withdrawal-related complications were similar between groups. Acute antipsychotic use was greater in patients with psychotropic interruption ( < 0.01). Acute benzodiazepine use was not different between groups ( = 0.87). Most patients did not have a documented reason for therapy interruption. Unless contraindicated, clinicians should attempt to restart home psychotropic medications as soon as possible in critically ill patients.