There are many types of emergency cardiac medications, none of which is the most effective. For example, nitroglycerin can be used for angina pectoris, nifedipine can be used for sudden rise in high blood pressure, and other emergency medications include epinephrine and so on. First aid drugs for the heart are chosen differently according to different diseases, such as common angina patients can carry nitroglycerin, which can be taken orally quickly when angina attacks, and stop all activities for rest to avoid aggravation by exertion. If a patient with hypertension has a sharp rise in blood pressure, he can take nitrendipine and captopril under the tongue to lower the pressure. In addition, hospitals have a wide range of rescue medications, such as epinephrine, atropine, dopamine and lidocaine, which are always available in the emergency room. The use of medication should be under the supervision of a doctor and should not be used without authorization.