Many medications are administered according to the weight of the patient. Because it is often not available in the emergency department (ED), the patient’s weight is therefore estimated. Several studies have shown that emergency physicians are inaccurate at estimating a patient’s weight.1–3 Medications to facilitate intubation, induction agents and paralytics are often weight-based. This study evaluated the accuracy of dosing succinylcholine, a paralytic and etomidate, an induction agent, in our ED.