For adults, the maximum dosage of ibuprofen is 800 milligrams per dose or 3,200 milligrams per day. It is recommended to take the smallest possible dosage to alleviate pain, states Drugs.com.
Ibuprofen is a nonsteroidal anti-inflammatory drug, or NSAID. Ibuprofen and other NSAIDs are used in combination medicines, so it is possible to take too much ibuprofen when it is used with combination medications. Ibuprofen also limits the effectiveness of aspirin, so they should not be used in conjunction, especially when an individual takes aspirin to prevent stroke or heart attacks. Overdose symptoms of ibuprofen include nausea, vomiting, stomach pain, drowsiness, bloody stools, shallow breathing, fainting or coma, states Drugs.com.