A group of patients with food poisoning was recently admitted who developed a range of clinical manifestations after sharing a meal of pork liver and other foods. The provincial CDC urine test was positive for leptin. Leptin, also known as clenbuterol hydrochloride, was originally a veterinary drug for the treatment of pig asthma, white or off-white crystalline powder, pig consumption in the metabolic process can promote protein synthesis, accelerate the transformation and decomposition of fat, improve the leanness of pork. If the pork containing “lean meat essence” is consumed, the clinical manifestations will have the following symptoms: acute poisoning will be palpitations, face and neck, limb muscle tremors, hand trembling or even unable to stand, dizziness, weakness; patients with pre-existing cardiac arrhythmias are more likely to react, such as tachycardia, premature ventricular beats, electrocardiogram shows S-T segment depression and T-wave inversion. Patients with sympathetic hyperfunction, such as hypertension, coronary artery disease, hyperthyroidism, the above symptoms are more likely to occur; combined with glucocorticoids, can cause hypokalemia, resulting in arrhythmias. After the occurrence of “lean protein” poisoning, gastric lavage and infusion should be carried out to promote the discharge of toxic substances; in the electrocardiogram monitoring and electrolyte determination, the use of cardioprotective drugs, such as fructose 1,6-diphosphate (FDP) and other drugs. Therefore, once the above symptoms occur after consuming pork, you must go to the hospital for treatment in time.