Effects and side effects of traditional Korean medicine diet

I often see people around taking herbal medicine to lose weight.

I'm curious, but they take it for six months at a time.

I'm worried that if I take it for a long time, it might harm my body because my liver isn't in good condition, and I heard it can cause loss of appetite, so I'm also concerned about whether I might experience heartburn.

I want to know about side effects of herbal medicine.