WHAT IS ALREADY KNOWN ON THIS TOPIC: Emergency department (ED) crowding may result in delays in the administration of medication such as antibiotics for pneumonia. WHAT QUESTION THIS STUDY ADDRESSED: Does crowding cause delays in treatment for pain? WHAT THIS STUDY ADDS TO OUR KNOWLEDGE: In this retrospective analysis of 13,578 patients treated at a single inner-city ED, patients with severe pain were slightly less likely to receive pain medications quickly when the ED volume increased. HOW THIS MIGHT CHANGE CLINICAL PRACTICE: Crowding may delay the administration of pain medication in some patients. Standing orders for the administration of pain medication might mitigate such delays.