A mixture of ingredients? If you mean a standard aspirin tablet, it will have fillers and binders in it to keep the tablet together and help it break down in th

A mixture of ingredients? If you mean a standard aspirin tablet, it will have fillers and binders in it to keep the tablet together and help it break down in the GI tract and etc, but in essence anything labeled aspirin is acetylsalicylic acid. https://en.wikipedia.org/wiki/Aspirin https://en.wikipedia.org/wiki/Aspirin