Motrin dosage charts for infants and children are published the websites of Motrin and Parents. Adult dosage information is available from Motrin, Mayo Clinic and Drugs.com. When dosing Motrin, Parents notes that the strength of the medication must be determined first.
Adult Motrin dosages are typically determined by the condition being treated. For fever or pain in adults, the typical dose of Motrin is 200 to 400 milligrams every four to six hours, according to Drugs.com. Dosages for infants and children are based on the child's weight. Children may receive Motrin every six to eight hours if needed, not to exceed four doses in one day, states Motrin.