Welcome at HCM.. I have gone through your query and being your doctor I completely understand your health concerns.... What is his age? For how long he has been diagnosed with Alzheimer disease.??? What medicine he is taking?? Is there any other family history if tremors? For his long he has developed this tremors? Are tremors confined to specific part of body or not? Are they continuous or comes intermittently ? Is there any balance abnormality? Any shaky gross bodily movements?? Any history of diabetes or hypertension?? Based upon the history you have provided it is very difficult to diagnose whether it is Physiological tremors or pathological... He needs to assesd properly by neurologist for accurate diagnosis....you should meet neurologist ..he will examine his cerebellum along with basal ganglia function and add any necessary tests if he feels to be done..... Meanwhile he should continue with the routine chores and don t miss his medications... Hope your query is adequately answered if you still have any feel free to ask... Stay healthy Dr Saad Sultan