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Allergies; Allergy/Allergies; Anaphylaxis |
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An allergy is a immune malfunction whereby a person's body is hypersensitised to react immunologically to typically nonimmunogenic substances. When a person is hypersensitised these substances are known as allergens. The word allergy derives from the Greek words allos meaning "other" and ergon meaning "reaction" or "reactivity". Reactions can vary from the benign runny nose, to life-threatening anaphylactic shock and death.
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An antihistamine is a drug which serves to reduce or eliminate effects mediated by histamine, an endogenous chemical mediator released during allergic reactions, through action at the histamine receptor. Only 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.
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Allergy as related to Antihistamines
- Antihistamines -- familydoctor.org
Information about antihistamines from the American Academy of Family Physicians. ... What are antihistamines? Antihistamines are medicines that help stop allergy symptoms such as itchy ...
- Allergy & Antihistamines
Allergy & Antihistamines ... 1 . CLARATYNE/CLARITIN ALLERGY TABS (3 X 30) Claratyne™ (3 boxes of 30 tablets ...
- Antihistamines: important treatments for allergy, including hayfever
Table of Contents. Whatever are antihistamines? How do antihistamines work? Are antihistamines safe? Two of the newer antihistamines do have a rare but serious problem
- Allergy & Antihistamines
Allergy & Antihistamines ... 1. CLARATYNE/CLARITIN ALLERGY TABS (3 X 30) Claratyne™ (3 boxes of 30 tablets) Relieves symptoms ...
- Allergy Relief : Anti-Allergy Medicine : Antihistamines / Anti ...
Allergy Relief Anti-Allergy Medicine / Treatment for Allergies Rhinitis Medicine Antihistamine / Antihistamines AntiHistamines / Anti-Histamines
- Nasal Allergy Medications - Allergies: allergy symptoms, treatment ...
It is mainly through the H1 receptors that histamine causes symptoms of allergy. Antihistamines act by attaching to these same H1 receptor sites, thereby preventing histamine from binding to ...
- Allergic Rhinitis - Antihistamines
If possible, patients should take antihistamines before an anticipated allergy attack. Many antihistamines are available. They include short-acting and long-acting forms and are available as tablets ...
- Antihistamines - Page 1
Answers to your questions about antihistamines and more! Information you can trust: patient guides ... Summary. Antihistamines are the most commonly used type of drug for the treatment of allergy ...
- www.entnet.org
Over-the-Counter Drugs for Cold, Flu, Allergy, and Sinus Infection
When sneezing is caused by an allergy, antihistamines should be taken. For antihistamines to be most effective, take them at the onset of your allergy symptoms.

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