Cerebral Palsy , Advance Parkinson, HIE.

My father is having Parkinson. On 18-11-2025 he become unresponsive. His MRI reports mentioned Hypocix ischaemic Encephalopathy . He was put on ventilation after which seizure started coming to him. He was given medazolam to control seizure.During this period  many times his BP also decreased. He was given norod to control low BP. DOCTOR has inserted tracheostomy tube. He is being feed through ryles tube. Present medication is SYNDOPA Plus -TDS, BREVIPIL 75- BD, CLOBA 10 - OD at night. He is bedridden and very less responsive. He donot follow the command. When we talk to him he sometime blink his eye in response but not all the time. He bend his knee when he feel discomfort or when any pain is induced.He also sometime move his hand and leg finger. Is there any other medication that need to be given to make him more responsive ? What treatment should be given so that he start responding to our voice command. In year 2021 he has gone through SDH Surgery.