Ask a doctor or pharmacist before using other medicines for pain, fever, swelling, or cold/flu symptoms. They may contain ingredients similar to ibuprofen (such as aspirin, ibuprofen, ketoprofen, or naproxen). Avoid taking aspirin unless your doctor tells you to. If you also take aspirin to prevent stroke or heart attack, taking ibuprofen can make aspirin less effective in protecting your heart and blood vessels. If you take both medicines, take ibuprofen at least 8 hours before or 30 minutes after you take aspirin (non-enteric coated form). Avoid drinking alcohol. It may increase your risk of stomach bleeding.