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Loratadine, sold under the brand name Claritin among others, is a medication used to treat allergies. [5] This includes allergic rhinitis (hay fever) and hives. [5] It is also available in drug combinations such as loratadine/pseudoephedrine, in which it is combined with pseudoephedrine, a nasal decongestant. [5] It is taken orally. [5]
In some countries, it is only available over-the-counter in packages containing seven or ten 10 mg doses. [53] [54] Cetirizine is available as a combination medication with pseudoephedrine, a decongestant. [55] The combination is often marketed using the same brand name as the cetirizine with a "-D" suffix (for example, Zyrtec-D). [56] [57]
They are also structurally related to the tricyclic antidepressants (and tetracyclics), explaining the H 1-antihistaminergic adverse effects of those three drug classes and also the poor tolerability profile of tricyclic H 1-antihistamines. The second-generation H 1-antihistamine loratadine was derived from compounds in this group. Promethazine
Upon study of records in mouse studies associated with 40 common medications ranging from antibiotics, antihistamines, aspirin, and hydrocortisone, that for subjects with melanoma and lung cancers, fexofenadine, one of three medications, along with loratadine, and cetirizine, that target histamine receptor H1 (HRH1), demonstrated significantly ...
Over-the-counter (OTC) medicines at FamilyDoctor.org, maintained by the American Academy of Family Physicians. Contains extensive information on over-the-counter drugs and their responsible use, including specific guidance on several drug classes in question-and-answer format and information on common drug interactions.
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.
[medical citation needed] Loratadine is a long-acting antihistamine (H 1 histamine antagonist) that is less sedating than older substances of its type. [medical citation needed] In 2022, it was the 289th most commonly prescribed medication in the United States, with more than 500,000 prescriptions. [2] [3]
An H 3 receptor antagonist is a type of antihistaminic drug used to block the action of histamine at H 3 receptors.. Unlike the H 1 and H 2 receptors which have primarily peripheral actions, but cause sedation if they are blocked in the brain, H 3 receptors are primarily found in the brain and are inhibitory autoreceptors located on histaminergic nerve terminals, which modulate the release of ...