Hello! I have carefully studied your problem & would like to suggest you not to be so worried because your father, a 63 years old gentleman appears to have been experiencing the extreme sedative effect of the combination of five antidepressants / antipsychotics plus cetirizine
, all of these drugs cause a profound sedation.( Depof 37 is a combination of four drugs, Trihexphenidyl, Chlordiazepoxide
, Trifluperazine, and Imipramine
In this condition you should contact an eminent psychiatrist
The sedative effect will be subsided but may take a longer period, so your father should be under observation of a psychiatrist in view of certain complications, till his recovery.
Thanks & wishing a speedy recovery of your father!