Patient refuses vital signs monitoring on clozapine titration

I am confused, not sure how to solve this. Tried to convince patient several time but no results, he is a chain smoker and used to smoke 3 to 4 cigarettes while on S17 leave and he got plenty of leave. That’s why we tried to do it by saying “ we are worried about your physical health condition and you must cooperate with us vital signs monitoring otherwise we can’t sign you out” . But he refused it by saying he is alright and don’t care about what we says.