Tachycardia is a common and frequently occurring condition clinically, which can be observed in healthy populations as well as in those suffering from certain cardiac diseases causing tachycardia. The choice of medication should be made under the guidance of a doctor, and it is crucial not to misuse drugs arbitrarily. Tachycardia should not be treated with atropine, as its primary side effects can induce tachycardia. Using atropine can cause an already rapid heart rate to increase further, resulting in significant damage to the body. Tachycardia needs medications that inhibit sympathetic nerve excitement, commonly using receptor blockers, which can effectively suppress excessively rapid heart rhythms.