Nurofen Rapid Relief Maximum Strength 400mg Capsules Each capsule contains 400mg of ibuprofen which means you can take the recommended dose in just ONE capsule. Adults, the elderly and children 12 years and older: Initial dose 1 Capsule (400 mg) taken with water, then, if necessary, 1 Capsule (400 mg) every four hours. Do not chew the Capsules. Do not take more than 3 capsules (1200 mg) in 24 hours. Not suitable for children under 12 years without medical advice. If symptoms persist for more than 3 days, if pain or fever worsen or if new symptoms occur, consult your doctor or pharmacist.