Adults: The initial dose
is 400 mg. Follow-up doses are 200 mg to 400 mg every 4 hours as needed, up to
a maximum of 4 doses in a 24-hour period.
Children: Check with your child's doctor if your child is less than 6 months old or less than 12 pounds. Dosages are based on the child's
weight. Give follow-up doses every 6 hours as needed, up to a maximum of 4
doses in a 24-hour period.
Talk to your doctor before you give medicine to reduce a fever in a baby who is 3 months of age or younger. This is to make sure a young baby's fever is not a sign of a serious illness. The exception is if your baby has just had an immunization. Fevers sometimes occur as a reaction to immunizations. After immunizations, you can give your baby medicine to reduce a fever.
Adults: Initial dose is
440 mg. Follow-up doses are 220 mg every 8 to 12 hours as needed. Drink a full
glass of water with each dose. Do not take more than 440 mg in any 8-hour to 12-hour period or 660 mg in a 24-hour
Adults older than 65: Do not take
more than 220 mg every 12 hours unless your doctor tells you
Children: Do not give naproxen to
children younger than 12 unless your doctor tells you to. Your doctor may
prescribe naproxen for your child.