This study was designed to compare the safety and pharmacodynamic profiles of concomitant administration of single doses of ADASUVE and intramuscular (IM) lorazepam compared to that of each agent administered alone. Respiratory pharmacodynamics were monitored through recordings of respirations/minute and pulse oximetry. Other pharmacodynamic safety measures included effects on blood pressure, heart rate, sedation, and psychomotor measures of attention, information processing speed, reaction time, and coordination.