How long does it take you to get a Ph.D if are in the Physicians Assistant program?

You cannot get a Ph.D. *while* in a Physician Assistant (PA) program. PA programs are master's degree programs. To get a Ph.D., you would need to apply to and complete a doctoral program *after* you have completed your PA program and are a practicing PA (or possibly after completing another relevant master's program). The length of a Ph.D. program varies widely depending on the field and individual program, but typically takes 4-7 years.