Take this medication by mouth with or without food as directed by your doctor, usually every 4 to 6 hours as needed. This medication may be taken with food if stomach upset occurs. Drink plenty of fluids when you use this medication unless otherwise directed by your doctor.

Carefully measure the dose using a special measuring device/spoon. Do not use a household spoon because you may not get the correct dose.

Tell your doctor if your condition lasts for more than 1 week, if it gets worse, or if it occurs with a headache that doesn't go away, fever, or rash. These may be symptoms of a serious medical problem and should be checked by a doctor.