Echinacea, the drug name is Nitroglycerin Patch (II), the common initial dosage is one tablet per day applied to the skin of the chest, and the dose can be increased as needed at the discretion of the patient. Nitroglycerin Patch (II) is mainly used in the long-term treatment of coronary heart disease, can prevent angina attacks, can also be used in combination with digitalis and diuretics for the treatment of chronic heart failure, and is more suitable for the prevention of nocturnal angina attacks in patients. The starting dose of this product is one patch per day, applied to the skin of the chest, and the dose can be increased as appropriate. The patch should not be trimmed and should be applied in a way that avoids broken skin, skin in areas prone to irritation, scars, hair, and changing the site each time it is applied to avoid causing irritation. Adverse reactions of this product include headache, blood pressure drop, dizziness, feeling of weakness, skin allergies, etc. Acute circulatory failure, severe hypotension, early myocardial infarction, cardiogenic shock, glaucoma, severe anemia, increased intracranial pressure is prohibited in patients with acute circulatory failure, severe hypotension, early myocardial infarction, cardiogenic shock, glaucoma, severe anemia, intracranial pressure increase, and patients with allergy to any of the components of the drug is prohibited. It is recommended that patients who are unwell go to a regular hospital in time, and follow the doctor’s instructions for symptomatic treatment with medication.