薬やく理り学がく者しゃ

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Meanings

1

noun

pharmacologist

A specialist who studies the effects, mechanisms, and uses of drugs and medicines.

medicine, chemical, enamel

理logic, arrangement, reason

学study, learning, science

者someone, person

薬やく学がく
薬学 is the broader field of pharmacy or pharmaceutical sciences, while 薬理学者 specifically refers to a person who is a pharmacologist.
薬やく剤ざい師し
薬剤師 is a licensed pharmacist who dispenses medications, whereas 薬理学者 is a researcher who studies drug actions and effects.

Compound of 薬理 (pharmacology) + 学者 (scholar, -ologist).