How much should I take herbal diet pills?

In the case of traditional Korean medicine dieting, it seems that taking it for about two months is standard. If you stop after just one course, it is said that yo-yo effects can easily occur. When suppressed appetite suddenly explodes, it seems like weight gain will happen again quickly. So, how about taking it for about four months? If the duration is extended, the body might adapt a bit more to the reduced intake, but I wonder if it is okay to continue taking the medicine for such a long period.