Yes, pork essence is an animal medicine. There are several medicines called lean meat, such as ractopamine and lean meat. Adding lean meat to feed can increase the amount of lean meat in animals, reduce the consumption of feed, bring meat to the market in advance and reduce the cost. However, due to the side effects on human body, the standards for open use vary from country to country. It has an exciting effect on the heart and a strong and lasting dilating effect on bronchial smooth muscle. It is easier to be absorbed through the gastrointestinal tract after oral administration.

Harm of pork essence to human body: 1. Acute poisoning includes palpitation, facial and neck muscle tremor, hand shaking and even inability to stand, dizziness and fatigue. Patients with original arrhythmia are more likely to react, such as tachycardia, premature ventricular contractions, ECG showing S-T segment depression and T wave inversion.

2. The above symptoms are more likely to occur in patients with hyperthyroidism, such as hypertension, coronary heart disease and hyperthyroidism.

3. Combined with glucocorticoid can cause hypokalemia, which leads to arrhythmia.

4. Repeated use will produce tolerance, weaken the effect on bronchiectasis and shorten the duration. Although the residual toxicity of clenbuterol is light, the FDA research shows that people who use sympathomimetic drugs or are allergic to prodrugs have more serious reactions to clenbuterol than normal healthy people.