Patients with coronary heart disease are advised not to drink alcohol, especially those with combined heart failure, arrhythmias, and those who frequently experience angina, as alcohol contains ethanol, which can cause increased excitability of the sympathetic nerves, leading to faster heartbeats and increased heart burden. This can easily worsen heart failure and induce arrhythmias, potentially triggering angina attacks. In daily life, patients with coronary heart disease should consume a diet that is easy to digest and low in fat and salt. They should avoid spicy foods and quit smoking and drinking alcohol.