My son was put into an induced coma recently. He was out a couple weeks. They kept him out with a couple medicines, one of which was fentanyl. I’ve had most manner of pain meds, but never had oxy or fentayl.
We hope your son is okay now.
He was probably on slow iv drip with Fentanyl and Versed, and monitored closely.
The beauty of these drugs are their short half lives. You are feeling no pain if given before, during and briefly post op.
Those short half lives can be very addictive and dangerous if given by a non professional in a non professional setting.