Common causes of racing heart or palpitation include: strong emotional responses, such as fear, stress or anxiety, strenuous exercise, caffeine, nicotine, fever, taking cold and cough medications that contain pseudoephedrine, a stimulant and taking some asthma inhaler medications that contain stimulants. Occasionally heart palpitations can be a sign of a serious health problem, such as an overactive thyroid gland (hyperthyroidism) or an abnormal heart rhythm (cardiac arrhythmia). Arrhythmias may include very fast heart rates (tachycardia), unusually slow heart rates (bradycardia) or an irregular heart rhythm. Advice 1. Take rest and avoid all sorts of strenuous activity. Postpone workout until cause is identified and treated 2. Avoid tea, coffee, alcohol and smoking 3. Investigation – ECG at the time of heart palpitation 4. You can take alprazolam 0.25 mg per oral at bed time for 7 days 5. Consult a cardiologist Thanks!