Common Side Effects of Aspirin
Aspirin, or acetylsalicylic acid, often causes mild gastrointestinal issues like stomach pain, heartburn, nausea, or vomiting. These affect about 10-20% of users, especially at higher doses.[1]
Serious Risks and When They Occur
Higher risks include gastrointestinal bleeding or ulcers, which can be life-threatening in chronic users or those over 60. It also raises chances of hemorrhagic stroke in some people, though it lowers ischemic stroke risk. Reye's syndrome, a rare but fatal brain/liver condition, links to aspirin use in children with viral infections.[2][3]
Who Faces Higher Risks
People with ulcers, asthma, bleeding disorders, or on blood thinners like warfarin see amplified effects. Long-term daily use (e.g., for heart protection) increases bleeding odds by 50-70%.[1][4]
How to Spot and Manage Issues
Watch for black stools, severe stomach pain, ringing ears, dizziness, or easy bruising. Stop use and seek medical help if these appear. Taking with food or antacids reduces stomach irritation.[2]
Interactions and Precautions
Aspirin interacts with ibuprofen (blocks effects), alcohol (boosts bleeding), and steroids. Avoid in kids under 16 for fever. Pregnant people should skip it in the third trimester due to birth defect risks.[3][4]
Sources
[1]: FDA Aspirin Label
[2]: Mayo Clinic Aspirin Side Effects
[3]: NIH Aspirin Risks
[4]: Harvard Health Aspirin Guide