Aspirin should be avoided if you have a stomach (peptic) ulcer, haemophilia or other bleeding disorder, or an allergy to aspirin or to other non-steroidal anti-inflammatory drugs (NSAID).
The above characteristic pattern of furazolidone action on various animal ulcer models was found not to be Shared by known anti-ulcerdrugs such as carbenoxolone, atropine, cimetidine and doxepin.