Diltiazem is not recommended for cardiac neurosis. Diltiazem is a western medicine, and the common dosage forms are tablets, controlled-release capsules, and extended-release capsules. It is used for the treatment of angina pectoris, mild and moderate hypertension. In terms of its action, it does not treat cardiac neurosis. Common adverse effects of the drug are headache, dizziness, nausea, bradycardia, sinus block, atrioventricular block, malaise, rash, erythema simplex, vasculitis, erythema multiforme, exfoliative dermatitis, gingival hyperplasia, malaise, palpitations, flushing, and edema of the lower extremities. Contraindications to the use of Diltiazem include: hypersensitivity to the product; patients with sinus node dysfunction; patients with second or third degree atrioventricular block without a pacemaker; patients with congestive heart failure; patients with severe bradycardia (≤40 beats per minute); pregnant women or patients with suspicion of pregnancy; and patients with hypotension (systolic blood pressure of less than 90 mmHg), etc. The drug is contraindicated. Cardiac neurosis is a clinical syndrome characterized by symptoms related to cardiovascular diseases. Patients may have palpitations, precordial pain, shortness of breath and other symptoms, often combined with obvious anxiety, depression, fear, obsessive-compulsive, or neurasthenia and other psychological disorders. But patients generally do not have organic heart disease. Cardiac neurosis to psychological treatment, if necessary, can be given anti-anxiety or anti-depression drug therapy, such as clonazepam, lorazepam, amitriptyline, doxepin and so on. If you need to treat cardiac neurosis, you should go to a regular hospital, under the guidance of a professional doctor to standardize the treatment, not blindly self-medication, so as not to aggravate the condition or produce adverse reactions.