Definition
A common over-the-counter medication used to relieve pain, reduce fever, and lessen inflammation, and in low doses to reduce the risk of blood clots. The FAA generally permits its use by pilots, but any underlying condition requiring it, and any side effects experienced, must be considered before flight.
Plain English
Aspirin. A widely used pain and fever reliever that the FAA usually allows pilots to take, though the reason you are taking it can matter as much as the medication itself.
Context Anchor
Seen in aeromedical and drug-use discussions, especially when reviewing common medicines a pilot might take before a flight.
Derivation
From acetyl (an added chemical group) plus salicylic acid, originally derived from salicin, a compound found in willow bark (Latin salix, willow). Willow bark was used for pain relief for centuries before the active ingredient was isolated and modified in the late 1800s into the more stomach-friendly form sold as aspirin.
Why Pilots Care
FAA guidance requires pilots to confirm that any medication including aspirin will not impair judgment, alertness, or physical ability before flying.
Intuition Check
Do not assume aspirin is automatically flight-safe just because it is common and sold without a prescription. The medicine, its side effects, and the condition being treated all matter.
Example Sentence 1
He took an acetylsalicylic acid (aspirin) for a mild headache that morning and, feeling fully clear-headed, continued with his planned flight.
Example Sentence 2
Aspirin, known chemically as acetylsalicylic acid, was cleared by the flight surgeon for occasional use on non-flying days.