Document Classification

Section Type: RESULTS

Text: The following results were obtained (mean + / - SD) : average plasma fentanyl concentration from 24 to 72 hours, 0. 7 + / - 0. 2 ng/mL (P50), 1. 4 + / - 0. 5 ng/mL (P75), 1. 2 + / - 0. 5 ng/mL (P100) ; the total area under the concentration versus time curve (0 hours to infinity), 46 + / - 12. 2 ng/h/mL (P50), 101. 2 + / - 41. 4 ng/h/mL (P75), 80. 4 + / - 38. 3 ng/h/mL (P100) ; and the apparent elimination half-life, 3. 6 + / - 1. 2 hours (P50), 3. 4 + / - 2. 7 hours (P75), and 2. 5 + / - 2. 0 hours (P100).