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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]
Synthetic compounds such as diphenhydramine (Benadryl) and dimenhydrinate (Dramamine) are deliriants. Nutmeg , although purportedly not as strong or as unpleasant as diphenhydramine or scopolamine, is considered a deliriant, due to its propensity to cause anticholinergic-like symptoms when taken in large doses. [ 30 ]
Orphenadrine (sold under many brand names) [1] is an anticholinergic drug of the ethanolamine antihistamine class; it is closely related to diphenhydramine.It is a muscle relaxant that is used to treat muscle pain and to help with motor control in Parkinson's disease, but has largely been superseded by newer drugs.
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.
Acrivastine is a medication used for the treatment of allergies and hay fever.It is a second-generation H1-receptor antagonist antihistamine (like its base molecule triprolidine) and works by blocking histamine H1 receptors.
After receiving his PhD in 1940, Rieveschl returned to the University of Cincinnati where he served as a professor of chemical engineering, and later a professor of materials science.