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  2. Which Allergy Medicine Is Actually Most Effective? - AOL

    www.aol.com/lifestyle/allergy-medicine-actually...

    “While antihistamines [like Zyrtec and Claritin] can help with sneezing, itching and runny nose, first line therapy for relief of nasal congestion includes a steroid or antihistamine nose spray.”

  3. Diphenhydramine - Wikipedia

    en.wikipedia.org/wiki/Diphenhydramine

    Diphenhydramine is a first-generation antihistamine used to treat several conditions including allergic symptoms and itchiness, the common cold, insomnia, motion sickness, and extrapyramidal symptoms. [19] [20] Diphenhydramine also has local anesthetic properties, and has been used as such in people allergic to common local anesthetics such as ...

  4. 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.

  5. Antihistamine - Wikipedia

    en.wikipedia.org/wiki/Antihistamine

    Antihistamines are drugs which treat allergic rhinitis, common cold, influenza, and other allergies. [1] 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. [1]

  6. Chlorphenamine - Wikipedia

    en.wikipedia.org/wiki/Chlorphenamine

    It is a first-generation antihistamine and works by blocking the histamine H 1 receptor. [2] Common side effects include sleepiness, restlessness, and weakness. Other side effects may include dry mouth and wheeziness. [2] Chlorpheniramine was patented in 1948 and came into medical use in 1949. [3] It is available as a generic medication and ...

  7. 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]

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