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Children and infants can usually take ibuprofen every six to eight hours but should not have more than four doses in 24 hours unless directed by a doctor. If you are unsure about how much ibuprofen to give a child, consult a doctor who will determine the dosage based on the childâs weight.
Answer Wiki. The maximum dose of OTC ibuprofen is 1,200 mg per day. In the US, OTC ibuprofen is sold in 200 mg tablets, meaning you can take a maximum of six tablets in 24 hours. If 1,200 mg of ibuprofen is not adequate to treat your pain, you should speak with a doctor.