他每天吃药用英文怎么说

在英语中，"每天吃药"可以用"take medication daily"来表达。

"Take"是一个动词，意思是"服用（药物）"。"Medication"是名词，意思是"药物，药"。"Daily"是副词，意思是"每天"。

例句：

I have to take my medication daily to control my blood pressure. (我必须每天服用药物来控制血压。)
Remember to take your medication daily at the same time. (记得每天固定时间服用药物。)
It's important to take your medication daily as prescribed by your doctor. (按照医生的嘱咐每天服用药物很重要。)