The chemical makeup of aspirin, also known as acetylsalicylic acid, comprises several elements. Its molecular formula is C9H8O4, indicating that each aspirin molecule contains nine carbon (C) atoms, eight hydrogen (H) atoms, and four oxygen (O) atoms. Aspirin is classified as a non-steroidal anti-inflammatory drug (NSAID) and is widely used for its pain-relieving, anti-inflammatory, and antipyretic properties. It works by inhibiting enzymes involved in the production of prostaglandins, which play a key role in inflammation and pain signaling. Its discovery marked a significant advancement in pharmacology.