The North American Malignant Hyperthermia Registry of …

Fentanyl: 92% transdermal, 50% buccal. Codeine: 90% PO Half life Morphine: 2-3hrs. Methadone: 25-52 hrs (varies greatly due to enzyme differences) Fentanyl: 3-12hrs. Codeine: 2.5 – 3 hrs. Prolonged in renal failure Duration of Action Morphine: 4-5hrs. Methadone: 4-6hrs. Fentanyl: 1 – 1.5hrs ................
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