Learn about Infants; Motrin Concentrated Drops and how much to use to help your infant feel better. The chart bases the dosage on the child;s weight and age. 18-23 pounds, 12-23 months, 1.875 mL Day, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26,...