Hi Doctor I Would Like To Know Why Parkin 2mg,sizodon

Hi Doctor
I would like to know why parkin 2mg,sizodon 4mg , and arzu 10 mg suggested for.

My father 58 is consuming a combination of parkin sizodon and arzu from past 1 month. Before for about many years he was consuming parkin sizodon and prodep.

Symptoms: speaking to himself,moving away from responsibilities,spreading out his left hand fingers while walking,getting violent while told about going to work because he hate work (but the violence behavior redused now aft when he started consuming the medicins),to and fro motion of the body.

Fortunately it happed so that he forgot to comsume parkin one day and we could see that certain manerisums like speading his fingers and talking to himself had stopped,and so we stopped him from consuming parkin from past 1week.

I would like to know wats is it all happening and y.He was a strong human being q person who worked late nights and highly respobsible at his age of 18 to around 21 but dont know all of a sudden he turns out to be mentally sick and is wat he is now. he says he was mentally and physically strained at that age since he couldnt have food timely.

I really dont know wat is it all.All I want is my father back plz help me out doctor.

Thanks and regard