ABN suspension is a medication used to treat parasitic worm infections in children. It prevents worms from absorbing essential nutrients, causing their death. The treatment is given orally, with a fat-containing food like milk. If the child vomits within 30 minutes, the same dose is given again. The duration of treatment depends on the worm type and may be repeated after two weeks. Common side effects include nausea, vomiting, dizziness, headache, abdominal pain, hair loss, mild fever, sore throat, and bleeding. It is important to inform the doctor about any previous medical conditions.