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Does one need to take into account the age or weight when determining the dosage of infant Advil? Because there is a difference between 1ml and 1.4ml. My baby is 5 months old and weighs 19lbs.

When determining the dosage of Advil for a baby, it is best to consider their weight rather than their age. In this case, the recommended dosage is 10mg per kilogram every 8 hours. So, for a baby weighing 19 pounds, the appropriate dose would be 86mg. This would correspond to approximately 1.1 ml of the 80mg/ml dose.