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Cetirizine is a second-generation antihistamine used to treat allergic rhinitis (hay fever), dermatitis, and urticaria (hives). [5] It is taken by mouth. [6] Effects generally begin within thirty minutes and last for about a day. [6]
Zyrtec works by blocking the histamine 1 receptor in your body, explains David Corry, MD, professor of allergy medicine at Baylor College of Medicine in Houston. “Histamine is a chemical that is ...
Antihistamines are drugs which treat allergic rhinitis, common cold, influenza, and other allergies. [1] Typically, people take antihistamines as an inexpensive, generic (not patented) drug that can be bought without a prescription and provides relief from nasal congestion, sneezing, or hives caused by pollen, dust mites, or animal allergy with few side effects. [1]
The intradermal allergy test is more sensitive than the skin prick test, but is also more often positive in people that do not have symptoms to that allergen. [ 40 ] Even if a person has negative skin-prick, intradermal and blood tests for allergies, they may still have allergic rhinitis, from a local allergy in the nose.
Sinus infection, rhinosinusitis: An illustration showing the difference between healthy sinuses and diseased sinuses: Specialty: Otorhinolaryngology: Symptoms: nasal discharge, nasal blockage, facial pain, reduction or loss of smell, fever [1] [2] Causes: Infection (bacterial, fungal, viral), allergies, air pollution, structural problems in the ...
You're not alone. It's the time of year when a stuffy nose and watery eyes really get out of hand. Fortunately, we can hook you up with something to take care of that.Get a free sample of Zyrtec ...
H 1 antagonists, also called H 1 blockers, are a class of medications that block the action of histamine at the H 1 receptor, helping to relieve allergic reactions.Agents where the main therapeutic effect is mediated by negative modulation of histamine receptors are termed antihistamines; other agents may have antihistaminergic action but are not true antihistamines.
Air caught in nasal cavities – namely the sinus cavities, cannot be released and the resulting pressure may cause a headache or facial pain. If the sinus passage remains blocked, there is a chance that sinusitis may result. [6] If the mucus backs up through the Eustachian tube, it may result in ear pain or an ear infection.