prescriptionist
/prɪˈskrɪpʃ(ə)nɪst/ /prɪˈskrɪpʃənɪst/noun
1A person who writes prescriptions; a physician. rare.
2A person who makes up or dispenses medicines in accordance with prescriptions; an assistant to a pharmacist.
3= prescriptivist.
Origin
Early 18th century; earliest use found in Myles Davies (1662–?1719), bibliographer. From prescription + -ist.