What is the active ingredient in aspirin?

The active ingredient in aspirin is acetylsalicylic acid, which belongs to the group of medications called nonsteroidal anti-inflammatory drugs (NSAIDs). Aspirin works by inhibiting the production of prostaglandins, which are substances responsible for producing pain, inflammation, and fever. It is used to relieve mild to moderate pain, reduce fever, and decrease inflammation. Aspirin is also used as a blood thinner to prevent blood clots in individuals with a higher risk of heart attack or stroke. Aspirin is available over-the-counter in various strengths, and its use should always be under the guidance of a healthcare professional. In addition to its therapeutic benefits, aspirin can cause side effects when used inappropriately or in high doses, such as gastrointestinal bleeding, ringing in the ears, and allergic reactions.