Home | High Point University | High Point, NC

Fentanyl toxicity may be more subtle than morphine toxicity due to a lack of hallucinations, myoclonus etc. and can present as vagueness, drowsiness or ‘not feeling well’ (). After discontinuing a fentanyl patch, fentanyl levels fall gradually. It takes 17 hours or more for the plasma-fentanyl concentration to decrease by 50% (4-8,11-14). ................
................