Don't take this medicine unless it's absolutely necessary.

非万不得已不要用这种药。

《新英汉大辞典》

I consider it (to be) absolutely necessary.

我认为这是绝对需要的。

youdao

Rebalancing the economy is absolutely necessary.

经济再平衡是绝对必要的。

youdao

The Russian president said the move was "legitimate" from the point of view of international law, "just" and "absolutely necessary."

VOA: standard.2009.08.26

The decisions had to be made. They were gut-wrenching, but absolutely necessary for Chrysler's survival,"

VOA: standard.2009.06.04

"It's absolutely necessary that we continue to push the envelope in terms of try to develop new innovative and more natural ways of effectively treating arthritis."

VOA: standard.2010.08.11

The Myth Of Stars 06.12.02 Movie stars are absolutely necessary to launch a hit picture.

FORBES: Hollywood's Bottom Line

He said further regulation of the press should only happen if it was "absolutely necessary".

BBC: Hacking: Miliband and Clegg seek media ownership limits

These functions don't make a business more competitive than the next, but they're all absolutely necessary.

FORBES