How to choose cold medicine for a cold? The common cold can generally heal itself in 5-7 days, and no medication is needed for mild symptoms; if the symptoms obviously affect daily life, cold medicine can be used to relieve the symptoms, and appropriate bed rest, drink more water, light diet, maintain nasal, pharyngeal and oral hygiene, while frequently opening windows to keep the indoor air fresh. 1, nasal congestion, runny nose, sneezing: recommend drugs containing chlorpheniramine and pseudoephedrine. 2, cough: drugs containing codeine and dextromethorphan can be chosen. 3, fever: if the body temperature ≥ 38.5 ℃, with headache, dizziness, generalized muscle aches, acetaminophen and ibuprofen can be selected; for patients without fever, antipyretic and analgesic drugs are not recommended; if the body temperature < 38.5 ℃, if not accompanied by other symptoms, physical cooling is sufficient. If all the above symptoms are present, it is recommended to take compound cold medicine containing antipyretic and analgesic + relief of nasal congestion + cough. Note: It is not advisable to take several cold medicines at the same time. Although there are many types of cold medicines on the market, the ingredients are roughly similar, so if you take several at the same time, you may overdose due to the superposition of drug doses, resulting in liver function damage. How to prevent a cold? 1, pay attention to the combination of work and rest, enhance the immunity of the body. 2, air conditioning should be cleaned before use, to avoid a large number of germs blowing out with the wind; do not forget to use air conditioning more ventilation. 3, drink more water, eat more fresh fruits and vegetables. 4, maintain a good mood and open-mindedness, can also play a certain degree of prevention of the cold effect. Although prevention is more important than cure, but also must be under the guidance of scientific theory, do not let the prevention of disease, into the destruction of health.