What is Bayer aspirin made of?

Bayer aspirin is made of the active ingredient aspirin, plus several inactive ingredients, notes the U.S. National Library of Medicine. The over-the-counter medication acts as a non-steroidal anti-inflammatory and temporary pain reliever for minor aches and pains.

Bayer low-dose aspirin also contains black iron oxide, brown iron oxide, carnauba wax, corn starch, D&C yellow #10 aluminum lake, FD&C yellow #6 aluminum lake, hypromellose, methacrylic acid copolymer type C, polysorbate 80 and powdered cellulose, plus propylene glycol, shellac, sodium lauryl sulfate, triacetin and triethyl citrate, according to the U.S. National Library of Medicine.

Bayer aspirin extra-strength caplets contain carnauba wax, corn starch, D&C red #7 calcium lake, FD&C blue #2 aluminum lake, FD&C red #40 aluminum lake, hypromellose and powdered cellulose, plus propylene glycol, shellac, titanium dioxide and triacetin, in addition to aspirin, states the U.S. National Library of Medicine.