Q. I heard that taking herbal weight loss medicine can cause heart palpitations or insomnia. Why do these reactions occur?

Herbal weight loss medicine works by significantly boosting your basal metabolic rate, essentially prompting your body to consume energy even while at rest. From a Western medical perspective, certain herbal components stimulate the sympathetic nervous system, which increases heart rate and promotes blood flow. This is comparable to the physiological state of sprinting on a treadmill; the palpitations, sweating, and dry mouth you feel are the exact same mechanisms your body uses during intense physical exertion. In Traditional Korean Medicine (TKM), this phenomenon is seen as the process of purging 'Phlegm-fluid' (Dam-eum) and 'Blood Stasis' (Eo-hyeol)—the sticky metabolic wastes and stagnant blood accumulated in the body. Burning through these impurities requires a substantial amount of 'Qi' (energy). Patients with 'Spleen Deficiency' (Bi-heo), or a naturally weak digestive system, may temporarily experience hand tremors or dizziness because their internal energy is being heavily taxed during this detoxification. Furthermore, as the herbs accelerate metabolism, internal 'Heat' is generated, which tends to dry out 'Body Fluids' (Jin-aek). This often manifests as thirst or difficulty falling asleep. The core of TKM weight loss therapy is finding the precise balance where your body can effectively clear waste without overtaxing your constitution. If you feel excessive discomfort, we will fine-tune the prescription to match your body's specific threshold.