My dads 79 and has had PD for 7 years. Probably stage 3/4. Has tried different meds but now on 2 sinemet plus(25mg) tablets 3 times a day. After he takes his first 2 in the morning he goes into a zombie like state unable to lift his head or eyes. He looks dazed but can speak. This lasts until about an hour before his next dose and then it all starts again. He gets a few hours each day in between taking these meds when he feels relatively normal. This can’t be right? Any advice. Thanks