Hi lynneat,
Welcome to the NeuroTalk Support Groups.
I don't have any experience with the Cogentin.
I just saw the word "tics" in your post and that's what is familiar to me.
Hopefully someone else will see your post here who does. but it seems very worrying
that they would want to stop it abruptly, especially at that dose.
This forum is fairly quiet mostly, but I'll post a link below to the sister site which
is PsychCentral. They have a Schizophrenia Forum there where you may
get faster responses.
http://forums.psychcentral.com/schizophrenia-psychosis/
I'm not 100% sure, but you may have to reregister over there.
I can understand you concern.
Edited to add:
Lynnat,
I see you've posted in Movement Disorders.
You may also want to post in
Medications and Treatments Forum
in case someone see it there and has advice.