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  2. Cetirizine - Wikipedia

    en.wikipedia.org/wiki/Cetirizine

    A positron emission tomography (PET) study found that brain occupancy of the H 1 receptor was 12.6% for 10 mg cetirizine, 25.2% for 20 mg cetirizine, and 67.6% for 30 mg hydroxyzine. [29] (A 10 mg dose of cetirizine equals about a 30 mg dose of hydroxyzine in terms of peripheral antihistamine effect.) [30] PET studies with antihistamines have ...

  3. Zafirlukast - Wikipedia

    en.wikipedia.org/wiki/Zafirlukast

    Zafirlukast is FDA-approved for the prevention and treatment of asthma in adults and children older than 5 years old. [1] Like other leukotriene receptor antagonists, zafirlukast is thought to be useful for the long-term treatment of asthma, but it is generally less effective than inhaled glucocorticoids as monotherapy (which are the standard of care) or long-acting beta-2 agonists in ...

  4. Anti-asthmatic agent - Wikipedia

    en.wikipedia.org/wiki/Anti-asthmatic_agent

    An anti-asthmatic agent, also known as an anti-asthma drug, refers to a drug that can aid in airway smooth muscle dilation to allow normal breathing during an asthma attack or reduce inflammation on the airway to decrease airway resistance for asthmatic patients, or both. The goal of asthmatic agents is to reduce asthma exacerbation frequencies ...

  5. Montelukast - Wikipedia

    en.wikipedia.org/wiki/Montelukast

    Montelukast, sold under the brand name Singulair among others, is a medication used in the maintenance treatment of asthma. [6] It is generally less preferred for this use than inhaled corticosteroids. [6] It is not useful for acute asthma attacks. [6] Other uses include allergic rhinitis and hives of long duration. [6]

  6. Levocetirizine - Wikipedia

    en.wikipedia.org/wiki/Levocetirizine

    Levocetirizine is an antihistamine. It acts as an inverse agonist that decreases activity at histamine H1 receptors. This in turn prevents the release of other allergy chemicals and increases the blood supply to the area, providing relief from the typical symptoms of hay fever.

  7. H1 antagonist - Wikipedia

    en.wikipedia.org/wiki/H1_antagonist

    Dose a Time to peak Half-life b Metabolism Anticholinergic Diphenhydramine: 50 mg 2–3 hours 2–9 hours CYP2D6, others Yes Doxylamine: 25 mg 2–3 hours 10–12 hours CYP2D6, others Yes Hydroxyzine: 25–100 mg 2 hours 20 hours ADH, CYP3A4, others No Doxepin: 3–6 mg 2–3 hours 17 hours c: CYP2D6, others No (at low doses) Mirtazapine: 7.5 ...

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