- Infants 24 to 42 weeks gestational age (GA) at birth, admitted to the Neonatal Intensive Care Unit (NICU), and scheduled to receive a heel lance will be eligible. Parents will be approached for participation within the first 2 weeks of the infant's life. Infants will be eligible for Trial 1, the non-opioid trial, if they have not received any opioids within 24 hours prior to the heel lance. Infants will be eligible for Trial 2, the opioid trial, if they are currently receiving an opioid infusion. Furthermore, observation of the procedures will be timed to ensure that no additional sucrose doses are provided within the previous 4 hours.