The drugs that inhibit tachycardia are also known as heart rate lowering and anti-arrhythmic drugs, mainly: a. Beta-blockers are the most commonly used drugs to prevent and control tachycardia, commonly used drugs are metoprolol succinate, bisoprolol, these drugs act directly on the heart after taking, so that the heart contraction force is weakened and the frequency of contraction is reduced; b. Digoxin is also a drug to control tachycardia, but only for Amiodarone is a commonly used anti-arrhythmic drug, which is suitable for almost all arrhythmias, and has both anti-arrhythmic and heart rate lowering effects; iv. Eszopiclone and diazepam also have the effect of lowering the heart rate.