The drug has some bad side effects.

这种药有些不好的副作用。

《牛津词典》

Not a bad side effect.

可见这真不是个坏的副作用。

youdao

That's where the bad side of prejudice sneaks in.

偏见的坏处开始显现。

youdao

It also causes bad side effects, some of which can be deadly.

VOA: special.2010.01.04

That's where the bad side of prejudice sneaks in.

偏见的坏处开始显现。

耶鲁公开课 - 文学理论导论课程节选

If it's an African American or a bad word, a negative word, I want you to shout out "right," this side, "right."

如果是黑人，不好的词，或贬义词，你们就大叫喊”右“，这边，”右“

耶鲁公开课 - 心理学导论课程节选

Price controls, even if laboriously tweaked, inevitably produce inefficiencies, reduce supply and cause bad side-effects.

ECONOMIST: Housing in New York City

And last night Barack Obama went right back to the tough love approach that got him on Jackson's bad side.

NPR: Obama Salutes Old Guard In NAACP Speech

Furthermore, alternative medicine techniques like meditation can be really helpful in reducing stress, which has all kinds of bad side effects.

FORBES: Science & Skepticism Part One: Homeopathy