Salbutamol, also known as albuterol, is a medication that opens up the medium and large airways in the lungs. It is a short-acting β2 adrenergic receptor agonist which works by causing relaxation of airway smooth muscle. It is used to treat asthma, including asthma attacks, exercise-induced bronchoconstriction, and chronic obstructive pulmonary disease (COPD). It may also be used to treat high blood potassium levels. Salbutamol is usually used with an inhaler or nebulizer, but it is also available in a pill, liquid, and intravenous solution. Common side effects include shakiness, headache, fast heart rate, dizziness, and feeling anxious. Serious side effects may include worsening bronchospasm, irregular heartbeat, and low blood potassium levels. It can be used during pregnancy and breastfeeding, but safety is not entirely clear. In agriculture and animal husbandry, the ratio of muscle/fat can be changed to achieve the purpose of increasing fattening and growth of animals. It causes muscle tremor, muscle pain, headache, dizziness, nervousness, heart palpitations, tachycardia, and even nausea, vomiting and other symptoms of poisoning after eating animals containing higher Salbutamol. It is currently banned in food production because it may remain in the food chain and cause great harm to human health.