Definitions for antihistamine
ˌæn tiˈhɪs təˌmin, -mɪn, ˌæn taɪ-an·ti·his·tamine

Princeton's WordNetRate this definition:0.0 / 0 votes

1. antihistaminenoun

   a medicine used to treat allergies and hypersensitive reactions and colds; works by counteracting the effects of histamine on a receptor site

WiktionaryRate this definition:0.0 / 0 votes

1. antihistaminenoun

   A drug or substance that counteracts the effects of a histamine. Commonly used to alleviate the symptoms of hay fever and other allergies.

WikipediaRate this definition:0.0 / 0 votes

1. Antihistamine

   Antihistamines are drugs which treat allergic rhinitis, common cold, influenza, and other allergies. 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. Antihistamines are usually for short-term treatment. Chronic allergies increase the risk of health problems which antihistamines might not treat, including asthma, sinusitis, and lower respiratory tract infection. Consultation of a medical professional is recommended for those who intend to take antihistamines for longer-term use.Although people typically use the word "antihistamine" to describe drugs for treating allergies, doctors and scientists use the term to describe a class of drug that opposes the activity of histamine receptors in the body. In this sense of the word, antihistamines are subclassified according to the histamine receptor that they act upon. The two largest classes of antihistamines are H1-antihistamines and H2-antihistamines. H1-antihistamines work by binding to histamine H1 receptors in mast cells, smooth muscle, and endothelium in the body as well as in the tuberomammillary nucleus in the brain. Antihistamines that target the histamine H1-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. H2-antihistamines bind to histamine H2 receptors in the upper gastrointestinal tract, primarily in the stomach. Antihistamines that target the histamine H2-receptor are used to treat gastric acid conditions (e.g., peptic ulcers and acid reflux). Other antihistamines also target H3 receptors and H4 receptors. Histamine receptors exhibit constitutive activity, so antihistamines can function as either a neutral receptor antagonist or an inverse agonist at histamine receptors. Only a few currently marketed H1-antihistamines are known to function as inverse agonists.

ChatGPTRate this definition:0.0 / 0 votes

1. antihistamine

   An antihistamine is a type of medication that is used to treat various types of allergic reactions by blocking the action of a chemical substance called histamine in the body. Histamine is involved in immune responses, causing symptoms such as sneezing, itching, runny nose, or watery eyes. Antihistamines are typically used to alleviate such symptoms of allergies, hay fever, or the common cold. Some antihistamines also serve as sleep aides due to their sedating effects.

WikidataRate this definition:0.0 / 0 votes

1. Antihistamine

   An H1 antagonist is a histamine antagonist of the H1 receptor that serves to reduce or eliminate effects mediated by histamine, an endogenous chemical mediator released during 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. In common use, the term "antihistamine" refers only to H1 antagonists, also known as H1-receptor antagonists and H1-antihistamines. It has been discovered that these H1-antihistamines are actually inverse agonists at the histamine H1-receptor rather than antagonists per se.

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1. • Medicine

How to pronounce antihistamine?

1. Alex

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How to say antihistamine in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of antihistamine in Chaldean Numerology is: 4

2. Pythagorean Numerology

   The numerical value of antihistamine in Pythagorean Numerology is: 7

Examples of antihistamine in a Sentence

1. Daniel Markowski:

   In general, all of the various anti-itch creams are very similar, generally, I suggest that if you're highly allergic to mosquitoes, you may need a cream with Benadryl or a similar antihistamine.

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References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=antihistamine
2. ^ Wiktionary
   https://en.wiktionary.org/wiki/Antihistamine
3. ^ Wikipedia
   https://en.wikipedia.org/wiki/Antihistamine
4. ^ ChatGPT
   https://chat.openai.com
5. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=antihistamine