After the beginning of winter, the number of outpatients in major hospitals in Beijing has suddenly increased, especially some middle-aged and elderly people, who have asked for infusions of blood vessel-clearing drugs to prevent cardiovascular and cerebrovascular disease attacks. This kind of infusion has been in use for more than 10 years. Does this method really work? ”Autumn and winter are indeed the high incidence of cardiovascular and cerebrovascular diseases, but there is no scientific basis for relying on this preventive infusion method to prevent them.” At present, preventive infusions for the elderly mainly involve the infusion of drugs that activate blood circulation, lower blood viscosity, anti-free radicals and anti-platelet aggregation. These drugs can indeed play a role in vasodilatation, but they only have a therapeutic role, not a preventive role, and cannot be infused whenever you want. More seriously, some elderly people tend to be infused for days at a time, which may increase the risk of nosocomial infections, as well as drug allergies, and may cause complications such as fever, pulmonary edema, phlebitis or air embolism. ”In general, the half-life (or expiration) of vasodilator drugs infused in the elderly is only three or four hours, unlike many people who imagine that a single infusion will guarantee months of freedom from disease.” The half-life of each drug is different, short less than two hours, long can reach eleven or twelve hours. Like penicillin’s half-life of only two hours, glyceryl trinitrate only half an hour, so such drugs often have to be infused for at least an hour, and in some cases three or four times a day. This increases the patient’s expenses, not to mention the invisible risk of infection from the injection. “From this point of view, even if you really want to infuse, you should try to choose long-acting preparations, to anti-infective drugs, for example, it is best to choose azithromycin, rather than erythromycin. This is because the former can be infused once a day, while the latter has to be infused two or three times a day.” Finally, try not to get an infusion if you can. World Health Organization officials have pointed out that Chinese people are too superstitious about intravenous drips, when in fact 70 percent of Chinese people do not need infusions. The internationally accepted medication policy is not to use intramuscular injections if you can take them orally, and not to use infusions if you can inject them intramuscularly. Infusion should be chosen only when oral and intramuscular injections cannot be used. Hong Zhaoguang suggested that if you have a common cold and fever, don’t rush to infusion first, and adopt some “therapy” that can mobilize the body’s resistance, such as drinking more hot water, resting more, keeping warm, eating lightly, etc., and rely on the body to recover naturally. If the fever cannot be relieved by these methods, it is also up to the doctor to decide whether to use medicine or infusion.