(Concern) Diet pills? Herbal medicine? Which is more effective?

Vacation is over and August has begun. It's so hot that I have no appetite and sweat, so I believed the weight I lost would come off naturally... but it turns out that even if I sweat a lot, without exercise or diet, I only fluctuate by 1-2kg.

Traditional Korean medicine diet methods are said to have almost no severe side effects, sleep disturbances, or personality disorders like in the past. Is that true? They say it is tailored to my constitution... Hmm, I wonder which absorbs better and works faster, herbal medicine or Western medicine. Are the costs similar for both? Also, I am curious if I can take them together while on other medications.