aspirin is an NSAID, taking it modifies the prostaglandine levels (through its COX inhibition) and this influences the mucosa of your stomach. ibuprofen can still have the same side effects, because its belonging to the same class of drugs.
this headline is a bit misleading on the first read, since it only affects functional (f)MRI, which is controversial since a longer time. a prominent example is the activity that has been detected in a dead salmon