Isosorbide tablets, i.e. isosorbide mononitrate tablets and quick-acting heart-saving pills can be taken together. Isosorbide Mononitrate Tablets are used for long-term treatment of coronary heart disease, prevention of angina pectoris, treatment of persistent angina pectoris after myocardial infarction; combined with digitalis and/or diuretics for treatment of chronic congestive heart failure, treatment of pulmonary hypertension. Quick-acting Heart-Saving Pills are used for coronary heart disease of the qi stagnation and blood stasis (blood stasis due to lack of qi flow) type, angina pectoris. The main adverse reactions of isosorbide mononitrate tablets are seen in headache, dizziness, upright hypotension, reflex tachycardia and facial flushing. There are no adverse reactions to quick-acting heart pills for the time being. The contraindications of isosorbide mononitrate tablets are acute circulatory failure, systolic blood pressure <90mmHg, acute myocardial infarction with low filling pressure, hypertrophic obstructive cardiomyopathy, constrictive pericarditis or pericardial tamponade, severe anemia, glaucoma, increased intracranial pressure, primary pulmonary arterial hypertension, and hypersensitivity to nitro compounds. There are no contraindications for quick-acting heart-saving pills. Generally fast-acting heart pill for acute attack emergency take, and in the usual prevention of coronary heart attack when available isosorbide mononitrate. The mechanism of action of the two are different, there is no contraindication to joint use, can be taken at the same time.