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   What are the two largest classes of antihistamines?

   • The two largest classes of antihistamines are H 1 -antihistamines and H 2 -antihistamines . H 1 -antihistamines work by binding to histamine H 1 receptors in mast cells, smooth muscle, and endothelium in the body as well as in the tuberomammillary nucleus in the brain.

   Antihistamine - Wikipedia

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   What are antihistamines used for?

   • Antihistamines that target the histamine H 1 -receptor are used to treat allergic reactions in the nose (e.g., itching, runny nose, and sneezing). In addition, they may be used to treat insomnia, motion sickness, or vertigo caused by problems with the inner ear.

   Antihistamine - Wikipedia

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   Do antihistamines bind to histamine receptors?

   • See more... Antihistamines are a pharmaceutical class of drugs that act to treat histamine-mediated conditions. There are two main classes of histamine receptors: H-1 receptors and H-2 receptors. Antihistamine drugs that bind to H-1 receptors are generally used to treat allergies and allergic rhinitis.

   Antihistamines - StatPearls - NCBI Bookshelf

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   What are H1 antihistamines used for?

   • Clinically, H 1 -antihistamines are used to treat allergic reactions and mast cell -related disorders. Sedation is a common side effect of H 1 -antihistamines that readily cross the blood–brain barrier; some of these drugs, such as diphenhydramine and doxylamine, may therefore be used to treat insomnia.

   Antihistamine - Wikipedia

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2. en.wikipedia.org › wiki › AntihistamineAntihistamine - Wikipedia

   en.wikipedia.org › wiki › Antihistamine

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   Medical uses. Types. H 1 -antihistamines. List of H 1 antagonists/inverse agonists. H 2 -antihistamines. H 3 -antihistamines. H 4 -antihistamines. Atypical antihistamines. Histidine decarboxylase inhibitors. Mast cell stabilizers. History. Society and culture. Research. Special populations. Potential uses studied. See also. References.

3. www.drugs.com › drug-class › antihistaminesList of Common Antihistamines + Uses & Side Effects - Drugs.com

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   Apr 17, 2023 · Antihistamines block histamine release from histamine-1 receptors and are mostly used to treat allergies or cold and flu symptoms, although some first-generation antihistamines (also called sedating antihistamines) may be used for other conditions, such as nausea or motion sickness.

   • What Are Antihistamines Used for?

     Antihistamines are very good at relieving symptoms of an allergic reaction, such as: 1. edema (swelling) 2. inflammation (redness) 3. itch 4. rash...
   • What Are The Differences Between Antihistamines?

     Antihistamines can be classified into two main categories: 1. first-generation antihistamines 2. second-generation antihistamines.First-generation...
   • What Are The Side Effects of Antihistamines?

     Side effects of first-generation antihistamines may include: 1. abdominal pain 2. blurred or double vision 3. constipation 4. dry eyes 5. a dry mou...

4. en.wikipedia.org › wiki › DiphenhydramineDiphenhydramine - Wikipedia

   en.wikipedia.org › wiki › Diphenhydramine

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   Diphenhydramine ( DPH) is an antihistamine and sedative mainly used to treat allergies, insomnia, and symptoms of the common cold. It is also less commonly used for tremors in parkinsonism, and nausea. [10] It is taken by mouth, injected into a vein, injected into a muscle, or applied to the skin. [10]

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5. my.clevelandclinic.org › health › drugsAntihistamines: Definition, Types & Side Effects

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   Jul 13, 2020 · Antihistamines are a class of drugs commonly used to treat symptoms of allergies. These drugs help treat conditions caused by too much histamine, a chemical created by your body’s immune system. Antihistamines are most commonly used by people who have allergic reactions to pollen and other allergens. They are also used to treat a variety of ...

6. www.goodrx.com › classes › antihistaminesAntihistamine Drugs List: 7 Common Antihistamines - GoodRx

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   Apr 1, 2024 · Benadryl, Zyrtec, and More: A List of 7 Antihistamines. Written by Kristine Foley, PharmD | Reviewed by Stacia Woodcock, PharmD. Published on April 1, 2024. Key takeaways: Antihistamines are a class of medications most often taken to treat allergy symptoms. There are first-, second-, and third-generation antihistamines.

7. www.ncbi.nlm.nih.gov › books › NBK538188Antihistamines - StatPearls - NCBI Bookshelf

   www.ncbi.nlm.nih.gov › books › NBK538188

   Jul 10, 2023 · Indications. Antihistamines are a pharmaceutical class of drugs that act to treat histamine-mediated conditions. There are two main classes of histamine receptors: H-1 receptors and H-2 receptors. Antihistamine drugs that bind to H-1 receptors are generally used to treat allergies and allergic rhinitis.