(Concern) Precautions for Oriental Medicine Diet

It seems that many people are doing traditional Korean medicine dieting these days! There are quite a few people around me who are losing weight while taking herbal medicine, and it seems to be quite effective.

I'm curious if there might be any side effects since the effects are so good.

Are there any precautions to be aware of when doing traditional Korean medicine weight loss?

I'm curious whether it's possible to maintain the reduced weight even if I stop taking herbal medicine.