Learn what "the side effect has been severe" means, when people say it, and how to use it naturally in English.

This means the speaker is saying the negative result or consequence has been very strong.
From Help! I’m Falling In Love With My Rude CEO, Episode 38
Someone says the side effect is severe, likely referring to a serious consequence.
Use this in medical or serious problem contexts to describe a strong negative effect. It is not a casual phrase and may sound clinical.
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