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Antihistamines, specifically H1-antihistamines, are medicines which provide relief for allergic symptoms such as runny nose, sneezing, itching, and watery eyes from seasonal allergies . They are usually the first line of medications prescribed by a general practitioner, or a pharmacist for allergies in a community pharmacy.
Antipsychotics by class Generic name Brand names Chemical class ATC code Typical antipsychotics; Acepromazine: Atravet, Acezine: phenothiazine: N05AA04
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]
It is a first-generation H 1-antihistamine and it works by blocking certain effects of histamine, which produces its antihistamine and sedative effects. [11] [2] Diphenhydramine is also a potent anticholinergic. [12] It is mainly used to treat allergies, insomnia, and symptoms of the common cold.
Doxepin has been used to treat angiodema and severe allergic reactions due to its strong antihistamine properties. [8] Diphenhydramine, known in the US as Benadryl, is approved for treatment of allergies, but is also used off label for nausea, anxiety, and more. [9] [10]
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 ...