While NSAIDs are safe for most people in recommended doses, the American Academy of Family Physicians says the following people shouldn't take these drugs unless they've consulted a doctor first:

• Anyone who takes a blood-thinning medication.
  
  
• Anyone with bleeding in the stomach, intestines or any type of bleeding disorder.
  
  
• Anyone who has stomach ulcers.
  
  
• Anyone who has liver or kidney disease.
  
  
• Anyone who consumes three or more alcoholic drinks per day.