There are other things you may need to avoid. It sounds like you have a senstivity to Aspirin. I have had the same symptoms you mention for years. If I eat anything with Tartrazine or Yellow dye #5 I get the same reaction as if I'd taken Aspirin. The other thing that has helped me is the drug Accolate. Its used to help Asthma sufferers but it really cut down on the severity of a reaction. My allergist said it helps to strengthen MAST cells, keeping Histamine from being released into tissues. I still get hives now and then. I think its difficult to guarantee that labels are correct so every now and then I get a reaction. I look for the yellow dye and usually find it! If you can afford it shop at Whole Foods or a natural market where they screen all theyre products for dyes etc... But you may not be senstitive to dyes but most people experience a cross reaction.