Sleep issue after hospital discharge

My father was critically ill and admitted to hospital for 20 days.My all of your blessings and amazing VK's blessings and Magic he came out of ICU with continues instructions to VK he has been discharged.But after coming to home everynight he is very anxious and restless . whenever he is sleeping he just sleeps for 10 mins and he is very scared that he can't sleep for the whole night .after being in icu for long he has lot of halucinations that he can't sleep in the night .I have given him CALM DOWN serum and DEEP Sleep instructions through VK but only one day he could sleep 5 hours .Kindly guide me what I should do.Golden Sunrise.Thank you in advance .