Adults should take 200 to 400 milligrams of ibuprofen orally every four to six hours to treat pain, fever and dysmenorrhea, according to Drugs.com. Dosage in children varies on the age and symptoms, and parents should adhere to the manufacturer and doctor recommendations. Dosages in children ages 6 months to 12 years should not exceed 40 milligrams a day.
Adults should not take more than 3200 milligrams in a single day. Individuals with some conditions, such as osteoarthritis and rheumatoid arthritis, should take 400 to 800 milligrams every six to eight hours, states Drugs.com
Individuals should take ibuprofen with an 8-ounce glass of water and avoid lying down for at least 10 minutes after ingesting the drug, states WebMD. Some individuals experience a side effect of stomach discomfort and may alleviate this symptom by eating food, drinking milk or taking an antacid with the ibuprofen. To reduce the risk of other side effects, such as bleeding in the stomach, individuals should take the lowest recommended dose that effectively manages symptoms. Alcohol and tobacco use in combination with ibuprofen can also increase the risk of bleeding. Ibuprofen can cause dizziness and drowsiness in some patients, so individuals should use caution when performing tasks, such as driving, that require the individual to be fully alert.