The recommended dosage of ibuprofen for adults typically ranges from 200 to 400 mg per dose, taken every 4 to 6 hours as needed. The maximum over-the- counter daily dose is 1200 mg (usually not more than 6 tablets of 200 mg each), while prescription doses can be higher, up to 3200 mg per day under medical supervision. It's best to take the smallest effective dose for the shortest time needed for pain relief. Taking ibuprofen with food can help reduce stomach irritation, and doses should not be taken more frequently than every 4 hours to avoid side effects like stomach ulcers or kidney issues.