Advil Child 100mg Suspension Berry 4oz. Ibuprofen 100 mg fever reducer/pain reliever per 5 ml. For ages 2-11 years. Aches & pains. Lasts up to 8 hours. Alcohol-free. Each teaspoon contains: sodium 3 mg. One dose lasts 6-8 hours. Long lasting: up to 8 hours of fever reduction. Great convenience: long duration means fewer doses needed per day