Graph illustrates mean frequency scores (± SD) /15 min for individual behaviors of the Forced Swim test: swimming, climbing, and immobility. Adult animals (PD55-56) were tested following either prolonged postnatal morphine exposure (N=24) or saline control (N=25). Specifically, morphine sulfate (10mg/kg sc twice-daily) or equivalent volume of saline was injected from PD1-14. We report no significant differences between two different pharmacological groups for any of the individual Forced Swim test behaviors: swimming, climbing, or immobility behavior. Two-tailed t-test.