User blog comment:Kajune/Does Dean require demon blood for Michael to possess him?/@comment-27593090-20151230201510

He only needed the blood to be strong enough to get control of his body for some seconds that Sam could jump in the cage with Lucifer

Lucifer drank demon blood because Nick wasn't his true vessel, and that nick doesn't explode, he drank the demon blood to preserve it. If Lucifer had Sam as his vessel, he doesn't need the demon blood because Sam is strong enough to hold him.

That is my opinion