yes but ibuprofen and aspirin both result in the same chemical being used in the body, acetylsalicylic acid , which is what causes pain relief. Aspirin directly contains this, which is why it is safer. Ibuprofen contains this is a more complex form that is broken down into the same chemicals causing action in the body. This is why it is more toxic because the more complex form is harder on the body to digst, but after all is said and done, your body ends up using acetylsalicylic acid from either drug. Companies dont want you to know about ibuprofen using the same thing as aspirin because people wouldnt buy Ibuprofen anymore since Aspirin is much safer. My father has been a pharmacist for almost 30 years so he knows what chemicals do what in the body. Its possible that I have misinterpreted what he said, but Im pretty sure this is what he told me