服用 (fukuyō) means “taking medication”

More examples

この薬は食後の服用が勧められています。ko no kusuri wa shoku go no fuku yō ga susu me ra re te i ma su

Taking this medicine after meals is recommended.

Describes putting medicine into the body, usually by swallowing it, for health care.

服薬fukuyaku: Taking medicine according to a prescribed amount or schedule.
内服naifuku: Taking medicine by mouth as part of medical care.

治療や健康管理のために薬を飲むこと。chi ryō ya ken kō kan ri no ta me ni kusuri o no mu ko to

The compound 服用 (fukuyō) combines 服 (fuku, "take") with 用 (yō, "use"), so it describes using medicine by taking it into the body.

服用 (fukuyō) often appears in dosage instructions, where it refers to taking medicine according to a stated amount or schedule.