what are first generation antihistamines?
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First-generation antihistamines include diphenhydramine (Benadryl), carbinoxamine (Clistin), clemastine (Tavist), chlorpheniramine (Chlor-Trimeton), and brompheniramine (Dimetane).
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Treats allergy symptoms and congestion. Allegra-D (fexofenadine / pseudoephedrine) is a combination allergy medicine that's useful if you have congestion and runny nose. Zyrtec (cetirizine) works to treat sneezing and runny nose, and causes less sedation compared to Benadryl.
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BRAND NAME(S): Allegra. USES: Fexofenadine is an antihistamine used to relieve allergy symptoms such as watery eyes, runny nose, itching eyes/nose, sneezing, hives, and itching.
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Allegra (fexofenadine) and Zyrtec (cetirizine) are both antihistamines that are available OTC in brand-name and generic form. Both are available in a variety of formats for dosing preference, such as tablet and liquid form. Allegra and Zyrtec are both used in adults and children.
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To help relieve a runny nose, itchy and watery eyes, and sneezing associated with the common cold, antihistamines may be considered. First-generation antihistamines including brompheniramine, chlorpheniramine, and clemastine, are preferred over the second-generation antihistamines in the management of these symptoms.
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Antihistamines are medications that block the histamine from activating the receptors, therefore eliminating the allergy symptoms. Claritin, or loratadine, is available over the counter in different forms. It causes less drowsiness compared to diphenhydramine because it is a second-generation antihistamine.
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Diphenhydramine (brand name: Benadryl®, Vetadryl®, Banophen®, Genahist®, Diphenhist®, Unisom®, Sominex ®) is an antihistamine used in cats, dogs, ferrets and other small mammals, birds, horses, and cattle to treat allergic reactions, motion sickness, and vomiting.
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['Cetirizine (Zyrtec)', 'Chlorpheniramine (Chlor-Trimeton)', 'Clemastine (Tavist)', 'Desloratadine (Clarinex)', 'Diphenhydramine (Benadryl)', 'Fexofenadine (Allegra)', 'Loratadine (Claritin)']
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The best over-the-counter drugs for most symptoms: The first line of defense for congestion, runny nose and sneezing is to take one of the newer, less sedating antihistamines: Cetirizine (Zyrtec), fexofenadine (Allegra) and loratadine (Claritin or Alavert). Trending stories,celebrity news and all the best of TODAY.
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Benadryl (diphenhydramine) and Allegra (fexofenadine hydrochloride) are antihistamines used to treat allergic symptoms of seasonal allergic rhinitis (sneezing, runny nose, itchy or watery eyes), and hives. Benadryl is also used to treat insomnia, motion sickness, and mild cases of Parkinsonism.
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Antihistamines are given to treat allergy symptoms, such as sneezing, runny nose, itching, or hives, and include drugs ending in -ine, such as diphenhydramine, loratadine, and brompheniramine.
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['Allegra Adult 24-Hour Allergy Relief. ... ', "Children's Zyrtec 24-Hour Allergy Relief Syrup With Cetirizine. ... ", 'Claritin 24-Hour Allergy Reditabs. ... ', 'Xyzal Allergy Relief Tablets. ... ', 'Zyrtec Prescription-Strength Allergy Medicine Tablets. ... ', 'Benadryl Ultratabs Antihistamine Allergy Relief.']
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Type I hypersensitivity is treated symptomatically with anti-inflammatory agents such antihistamines and epinephrine. ... They block the attachment of the IgE to the Fc receptors on mast cells and basophils and the subsequent release of histamine by those cells upon exposure to allergen.
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This subtype is further divided into two generations. While first-generation H1 antihistamines have a central effect and, thus, are also used as sedatives, second-generation H1 antihistamines have less central effects and are primarily used as antiallergic drugs.
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1. Antihistamines. Benadryl (diphenhydramine), Zyrtec (cetirizine), and Claritin (loratadine) are commonly used antihistamines that relieve allergy symptoms or counteract allergic reactions. Antihistamines are usually safe but make some dogs drowsy and others hyperactive.
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9 (HealthDay News) -- The U.S. Food and Drug Administration approved on Friday the allergy drug Zyrtec-D for non-prescription use in people 12 and older. It combines the antihistamine Zyrtec with a nasal decongestant. Zyrtec-D (cetirizine hydrochloride/pseudoephedrine) has been sold as a prescription drug since 2001.
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As noted above, all oral antihistamines including newer-generation antihistamines, such as Claritin, Zyrtec (cetirizine, Pfizer) and Allegra (fexofenadine, Aventis Pharmaceuticals) dry the eye. This can worsen ocular allergies in two ways.