y.Do not use ibuprofen if:You are allergic to it, to aspirin or to any other non-steroidal anti-inflammatory drugs or if you have had symptoms of asthma, shortness of breath or skin reactions when taking other non-steroidal anti-inflammatory drugs, including aspirin.You are pregnant, especially in the third trimesterYou have had a stomach or duodenal ulcerYou have experienced any gastrointestinal