Pneumonia patients should not drink alcohol. Pneumonia is an acute inflammation of the lung tissues, which can cause chills, high fever, generalized muscle aches and pains, as well as coughing and sputum, and can lead to a loss of appetite. Drinking alcohol can aggravate these clinical symptoms, especially in patients with fever, accelerate the heartbeat, cause general discomfort, and in severe cases can lead to cardiac arrhythmia. Pneumonia patients are usually treated with medications, such as cephalosporin antibiotics, and alcohol is usually not allowed when using cephalosporin antibiotics. This is because cephalosporins and alcohol are prone to disulfiram-like reactions, which can cause chest tightness, shortness of breath, panic, palpitations and other clinical manifestations. Therefore, patients with pneumonia, it is best not to drink alcohol.