Worming medicine can be taken once a year at an interval. The presence of parasites in the intestines not only affects intestinal health, but parasites in the intestines will also rob the body of nutrients, leading to malnutrition. In the prevention of parasitic infections, you can use worming medicine once a year to prevent, the use of worming medicine should try to choose in the fall, into the autumn when the roundworms in the intestine will develop into adult worms, and parasites in the small intestine. This is a good time to use worming medication, which not only has a better effect, but also prevents the remnants of eggs. However, it is best to do a routine fecal examination before taking the medicine, and only those who are found to have parasites in their bodies can use it. For people who do not have parasites in their bodies, there is no need to use worming drugs, otherwise the frequent use of worming drugs will also have a certain impact on the intestinal system, but not conducive to human health.