Plain English Meaning

It's the proper name for aspirin — the everyday painkiller you can buy without a prescription, also taken in small doses to keep blood from clotting too easily.

Full Definition

Acetylsalicylic acid is the chemical name for aspirin, a common over-the-counter medication used to relieve pain, reduce fever, and lessen inflammation. In low doses it is also used as a blood thinner to reduce the risk of clot-related events such as heart attack and stroke.

Context Anchor

Seen in FAA discussions of drugs and flying fitness, where aspirin may be listed by its formal chemical name.

Derivation

The name comes from how the drug is made. 'Salicylic acid' was first extracted from willow bark (Latin salix, willow), which had been chewed for pain relief for centuries. Chemists later combined it with an acetyl group to make it gentler on the stomach — hence acetyl-salicylic acid. Knowing this helps pilots recognise that 'acetylsalicylic acid' on a label is just aspirin under its formal name.

Why Pilots Care

Certain side effects and interactions can affect alertness or increase bleeding risk, requiring pilots to verify medication approval before flight.