This means that the medicine can also block another type of receptor found on the surface of certain cells.
If these receptors are affected, you may experience some of the side-effects associated with antihistamines.
This decreases your body's reaction to allergens and therefore helps to reduce the troublesome symptoms associated with allergy.Antihistamines are also used in the treatment of feeling sick (nausea) and being sick (vomiting).When your body comes into contact with whatever your allergy trigger is -- pollen, ragweed, pet dander, or dust mites, for example -- it makes chemicals called histamines.They cause the tissue in your nose to swell (making it stuffy), your nose and eyes to run, and your eyes, nose, and sometimes mouth to itch.Newer antihistamines have fewer side effects, so they may be a better choice for some people.
Some of the main side effects of antihistamines include: If you take an antihistamine that causes drowsiness, do so before bedtime.
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Specialised cells and chemicals, which defend your body, can now get access to the area.
While this is a helpful response, it also causes redness, swelling and itching.
This excessive release of histamine produces the associated symptoms of itching, swelling, runny eyes, etc.