Emergency Physicians Should Give Ketamine to Patients with Acute Suicidal Ideation Mediterranean Journal of Emergency Medicine & Acute Care April 8, 2026 Curtis Marino Acute suicidal ideation (SI) represents about 1% of all adult emergency department (ED) visits in the U.S. and has increased over the past few decades, especially in the wake of the COVID-19 pandemic. DOI: 10.52544/j5.66165 (opens in new tab)