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Diphenhydramine, sold under the brand name Benadryl among others, is an antihistamine and sedative. It is a first-generation H 1 -antihistamine and it works by blocking certain effects of histamine , which produces its antihistamine and sedative effects.
Benadryl can also be found in a topical form including gels and creams. Benadryl Itch Stopping Cream is a topical cream used to provide temporary itch relief for allergies, hives or even some insect bites. It can be found in the United States and Canada. This topical medication contains 2% of diphenhydramine hydrochloride and 1% of zinc acetate.
Diphenhydramine (Benadryl) was synthesized in 1943, tripelennamine (Pyribenzamine) was patented in 1946, and promethazine (Phenergan) was synthesized in 1947 and launched in 1949. [22] [23] [24] By 1950, at least 20 antihistamines had been marketed. [25]
First-generation antihistamines include diphenhydramine (Benadryl), carbinoxamine (Clistin), clemastine (Tavist), chlorpheniramine (Chlor-Trimeton), and brompheniramine (Dimetane). However, a 1955 study of "antihistaminic drugs for colds," carried out by the U.S. Army Medical Corps, reported that "there was no significant difference in the ...
An FAA report found that between 2012 and 2016, diphenhydramine was the most common pharmaceutical known to cause impairment detected in post-mortem toxicology tests performed on someone who may have been in charge of the aircraft at the time of a fatal plane crash, specifically naming both Benadryl and Sominex.
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Naproxen/diphenhydramine (trade name Aleve PM) is a formulation of naproxen with diphenhydramine marketed by Bayer Healthcare. [1] It is made as an over-the-counter drug . The intended use of the drug is relieve pain specifically when going to sleep.
The altered state of consciousness produced by common or 'classical' deliriant substances such as scopolamine, atropine and diphenhydramine is mediated through the drug compounds' competitive antagonism of the peripheral and central muscarinic acetylcholine receptors, especially the M 1 muscarinic receptor.