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Fentanyl
Description A narcotic analgesic. It is used as an adjunct to surgical anesthesia. 
Therapeutic Low 0.0020
Therapeutic High 0.0200
Units ug/mL 
Specimen P 
Half Life Low 3.00
Half Life High 12.00
VOD Low 3.00
VOD High 8.00
Toxic Level 0.030
Lethal Level 0.000
Plasma to Whole Blood ratio 1.00
Warnings Fentanyl is capable of producing severe respiratory depression, muscle rigidity, seizures, coma, and hypotension. Warnings - may impair mental and/or physical ability required for the performance of potentially hazardous tasks (e.g., driving, operating heavy machinery).