Talk to General Physician on Anastasia Maxillofacial Coma Every Thing Is Working Normally But Unconscious Can It Be The Drugs Used Under Surgery Process

he went through his first surgery 5 months back for maxillofacial about his jaw was swollen for over 10years plus and doctors removed a thing then he was supposed to go back for his jaw to be fixed properly But since the surgery which happened on Thursday upto now its 3days of not wakingup he is still unconscious Asking Does this usually happen if yes how long should he be in that state