The primary cause of allergic reactions to Saimese Cats is caused by allergens found in their sebaceous glands. The sebaceous gland which is part on the cat skin contains glycoproteins called "Felis domesticus" or Fel D1. Saimese Cats may carry different type and concentration o Fel D1 from other cat breeds. Thus people may observe they have different allergic reactions to different breeds of cats.
Some people have extreme Saimese Cat allergic reaction. Allergies due to siamese cats may include itchy eyes, red spotting and breathing troubles. Siamese cats allergies may be treated with antihistamines and antiallergics medicine like loratadine and cetirizine hydrochloride. Although you should consult your doctor first before taking in any medicine specially if you have other health issues.