Thanks for using healthcare magic.
I have gone through your available history.
Pexep Cr contains paroxetine which is anti depressant
medicine with anti anxiety property.
does your dad have any symptoms of depression like sadness of mood or decreased interest in surrounding pleasurable activities or somatic unexplained complains???
You should consult qualified psychiatrist
for detailed evaluation and treatment.
He may have early dementia. So your doctor may rule out that. Doctor may also advise to go for blood investigations like vitamin B12 deficiency
, thyroid dysfunction
or diabetes etc.
Treatment will be directed as per cause.