What are the possible side effects of daily aspirin therapy?

Side effects and complications of taking daily aspirin include:

• Stroke caused by a burst blood vessel. While daily aspirin can help prevent a clot-related stroke, it may increase the risk of a bleeding stroke. A bleeding stroke also is called a hemorrhagic stroke.
• Gastrointestinal bleeding. Daily aspirin use increases the risk of developing a stomach ulcer. If you already have a bleeding ulcer or gastrointestinal bleeding, taking aspirin may cause more bleeding. The bleeding may be life-threatening.
• Allergic reaction. If you're allergic to aspirin, taking any dose of aspirin can trigger a serious allergic reaction.

If you're taking aspirin and you need surgery or dental work, tell the healthcare professional. You and your healthcare team may need to take steps to prevent excessive bleeding. Don't stop taking a daily aspirin without talking to the healthcare professional that prescribed it.