How possible is it to change the career path for a pharmacist after 14 years?

It depends. But it is not difficult since the pharmacist has the basics of knowledge. Definitely, he needs to exert more efforts and focus.

senior level or manger postion 

14 years in a field is healthy experience. i think a pharmacist having 14 year experience should looking for a senior level managerial position rather to change career path.

its possible but needs too much focus.