Do you need 4 more years to become a pharmacy if have masters in public health?

No, a Master's in Public Health (MPH) does not count towards the requirements for becoming a pharmacist. To become a pharmacist, you need to complete a Doctor of Pharmacy (PharmD) degree, which is a professional degree typically requiring four years of study *after* completing a bachelor's degree. Your MPH is a separate, advanced degree in a different field.