Be sure to follow the nonprescription medicine precautions.
Dosage: Adults (age 20 and older), 650 mg every 4 hours, as needed. Maximum adult dose is 4,000 mg in a 24-hour period.
Side effects of aspirin include:
- Stomach upset or discomfort, which is the most common side effect. Taking aspirin with food may help.
- Ringing in the ears. Stop taking aspirin or take a smaller dose until the ringing goes away.
- Eye problems, such as blurred or double vision.
- Rapid, deep breathing.
Stop taking aspirin and call a health professional if side effects do not go away within 4 hours after the last dose of aspirin was taken.
Reasons not to take aspirin
Do not take aspirin if you:
- Are allergic to aspirin.
- Are pregnant or trying to become pregnant.
- Are breastfeeding.
- Have nasal polyps.
- Have a blood-clotting disorder.
- Have peptic ulcer disease.
- Have a history of gastrointestinal bleeding.
- Have a hangover.
Do not take aspirin if you are taking: