Rapid heartbeat on Procaterol can be caused by physiologic factors and adverse drug reactions. It can be treated by resting and changing drugs. 1. Physiological factors: the patient emotional excitement, nervousness, strenuous exercise, after a full meal may appear rapid heartbeat, can be relaxed through relaxation, rest and other relaxation to ease the patient’s symptoms. 2. Adverse drug reactions: Procaterol is a beta agonist, can make the bronchial dilatation, mainly used for asthma patients, but the drug can act on the cardiac beta receptor, can make the heart rate faster and the cardiac muscle contraction force, the patient will feel the heartbeat accelerated. Such cases should stop the drug in time and go to the hospital in time to change the drug treatment under the guidance of the doctor. Taking Procaterol may cause dry mouth, nausea, epigastric pain, palpitations and other adverse reactions, allergies, hypersensitivity to adrenoceptor agonists Procaterol is contraindicated. Taking Procaterol rapid heartbeat should promptly go to the hospital, under the guidance of the doctor for regular treatment.