After graduating, she became a licensed pharmacist.

pharmacist 是由词根 pharmac-（药物）加上后缀 -ist（表示"从事某种职业的人"）构成的名词，指"药剂师"，即专门从事药物配制和发放的专业医疗人员。licensed 表示"获得执照的、有资质的"。