Quick-acting heart pills are emergency drugs for patients with coronary heart disease and angina pectoris, and the way the drug is used is sublingual. Generally, when symptoms occur, the drug is placed under the tongue and dissolves quickly, and the drug can be absorbed into the bloodstream through the sublingual vein to play a rapid pharmacological effect, dilate blood vessels and improve the symptoms of chest pain, so it must be taken sublingually. And if swallowed, the drug into the digestive system first after the digestive system, followed by absorption into the blood effect of a longer period of time, and after full digestion, many of the active ingredients of the drug will disappear, so quick-acting heart pills in swallowing generally do not have a clear role in vasodilation, the drug has no effect. For acute episodes of angina, most use sublingual medication, whether it is quick-acting heart pills or nitroglycerin or cardiac pain, sublingual take effect quickly.