Question

اثر این دارو 3 ساعت بعد از خوردن ظاهر می شود.

Answer 1

It takes 3 hours for this medicine to kick in.(cambridge dic)

Comments

Dear BiZi, thanks for your good answer. you exactly mentioned to the good point. kick in means to start or to begin to have an effect. for example: painkillers kicked in and he became sleepy.

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you're welcome