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  2. H1 antagonist - Wikipedia

    en.wikipedia.org/wiki/H1_antagonist

    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.

  3. Histamine intolerance - Wikipedia

    en.wikipedia.org/wiki/Histamine_intolerance

    Histamine intolerance is a presumed set of adverse reactions (such as flush, itching, rhinitis, etc.) to ingested histamine in food. The mainstream theory accepts that there may exist adverse reactions to ingested histamine, but does not recognize histamine intolerance as a separate medical condition that can be diagnosed. [1]

  4. Hydroxyzine - Wikipedia

    en.wikipedia.org/wiki/Hydroxyzine

    Hydroxyzine, sold under the brand names Atarax and Vistaril among others, is an antihistamine medication. [8] It is used in the treatment of itchiness, anxiety, insomnia, and nausea (including that due to motion sickness). [8] It is used either by mouth or injection into a muscle. [8] Hydroxyzine works by blocking the effects of histamine. [9]

  5. H2 receptor antagonist - Wikipedia

    en.wikipedia.org/wiki/H2_receptor_antagonist

    Cimetidine was the prototypical histamine H 2 receptor antagonist from which later drugs were developed. Cimetidine was the culmination of a project at Smith, Kline & French (SK&F; now GlaxoSmithKline) by James W. Black, C. Robin Ganellin, and others to develop a histamine receptor antagonist that would suppress stomach acid secretion.

  6. Levocetirizine - Wikipedia

    en.wikipedia.org/wiki/Levocetirizine

    It is classified as a second-generation antihistamine and works by blocking histamine H 1-receptors. [6] [3] Levocetirizine was approved for medical use in the United States in 2007, [3] and is available as a generic medication. [4] In 2022, it was the 152nd most commonly prescribed medication in the United States, with more than 3 million ...

  7. Anti-allergic agent - Wikipedia

    en.wikipedia.org/wiki/Anti-allergic_agent

    Histamine receptors expressed in smooth muscles, vascular endothelial cells, the heart, and the central nervous system. [7] This prevents a range of cellular signaling cascades that lead to vasodilation and increased membrane permeability from happening, thus preventing allergic symptoms.

  8. Famotidine - Wikipedia

    en.wikipedia.org/wiki/Famotidine

    Famotidine, sold under the brand name Pepcid among others, is a histamine H 2 receptor antagonist medication that decreases stomach acid production. [4] It is used to treat peptic ulcer disease, gastroesophageal reflux disease, and Zollinger-Ellison syndrome. [4] It is taken by mouth or by injection into a vein. [4] It begins working within an ...

  9. Ketotifen - Wikipedia

    en.wikipedia.org/wiki/Ketotifen

    Ketotifen is an antihistamine medication and a mast cell stabilizer used to treat allergic conditions such as conjunctivitis, asthma, and urticaria (hives).Ketotifen is available in ophthalmic (eye drops or drug-eluting contact lenses) and oral (tablets or syrup) forms: the ophthalmic form relieves eye itchiness and irritation associated with seasonal allergies, while the oral form helps ...