'Tobacco allergy claims are classic junk science. There is no tobacco smoke antigen. And that this is THE reputable scientific opinion can be deduced from the fact that this information comes from a 28-page article, with 227 references, intended to present the "State of the Art" to professionals, in the American Review of Respiratory Disease, the journal of the American Lung Association. (GT O'Connor et al. The role of allergy and nonspecific airway hyperresponsiveness in the pathogenesis of chronic obstructive pulmonary disease. Am Rev Respir Dis 1989;140:225-252).
But the anti-smoking demagogues have encouraged public belief in "tobacco allergy" as a "useful lie" to use against smokers. They apparently believe that if they only repeat their unsupported claims of tobacco "allergy" that everyone will quickly their runny noses and all their other symptoms on tobacco smoke, instead of on the food they eat or other real allergens. If the demagogues had any genuine concern about this supposed allergy, the least they could do is warn peopIe against tomatoes and pepper.'
http://forces.org/Archive/evidence/147-There+Is+No+Tobacco+Allergy+Carol+Thompson.html...........
(Update) Ha, ha! Some ingenious opponents have found a way to wiggle out: "But it can trigger asthma, sometimes it is easier to say your allergic because most people will understand that."
Sorry to disappoint you, but NO, it can't trigger asthma. That's another lie.