Taking roundworm medication after meals is still effective, but the presence of food in the stomach and intestines will dilute the concentration of the medication, which will greatly reduce the effectiveness of the medication, and it is recommended that it should be taken on an empty stomach or before bedtime so that it can fully play its role. It is best to take roundworm medication once a year, as continuous use within a short period of time can cause damage to the liver, and since the liver of infants is not fully developed, this type of medication is prohibited for children under the age of two. Although roundworm medicine is effective, it is not recommended to take it indiscriminately. If patients suspect that there are roundworms in their bodies, they need to go to the hospital for examination first, and if they are confirmed to have roundworm infection in their bodies, it is recommended that they take roundworm medicine under the guidance of a doctor. After taking the deworming medicine, one should drink more water and eat more food containing plant fiber to strengthen intestinal peristalsis, promote defecation and promptly expel the worms killed or paralyzed by the medicine together with feces.