Hi Ilan, Clozapine can be extremely sedating especially for the elderly. How old is your dad? The usual dose used for schizophrenia- the primary use for clozapine- is 300 to8 or 900 mg/day. Often when clozapine is use for PD the dose is in the range of 5 to 25 mg/day. How much was your fater taking? Is he being treated here in Madison or elsewhere? You migt give Ed Mayland a call (check the phone book for his number and get on our local group's mailing list if you are not already coming to meetings. Charlie **************************************************************************** ************************************* Charles T. Meyer Madison, WI [log in to unmask] **************************************************************************** ************************************