If you're Asthmatic (it's generally not advised to take Aspirin or Ibuprofen as you could be allergic to it), if you have an ulcer, if you're on a blood thinner

If you're Asthmatic (it's generally not advised to take Aspirin or Ibuprofen as you could be allergic to it), if you have an ulcer, if you're on a blood thinner such as warfarin.