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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.
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Benadryl Allergy is widely used as a sleep aid among adults. While it is not marketed as an over-the-counter (OTC) sleeping aid, most versions of Benadryl contain diphenhydramine, a drug with sedative properties. [6] Diphenhydramine (Benadryl) has also been used by parents to help improve their infant's sleep habits.
ATC code R06 Antihistamines for systemic use is a therapeutic subgroup of the Anatomical Therapeutic Chemical Classification System, a system of alphanumeric codes developed by the World Health Organization (WHO) for the classification of drugs and other medical products.
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 ]
Dimenhydrinate is a theoclate salt composed of diphenhydramine and 8-chlorotheophylline (a theophylline relative) in a 1:1 ratio. [ 2 ] Dimenhydrinate was introduced to the market by G.D. Searle in 1949.
ATC code D04 Antipruritics, including antihistamines, anesthetics, etc. is a therapeutic subgroup of the Anatomical Therapeutic Chemical Classification System, a system of alphanumeric codes developed by the World Health Organization (WHO) for the classification of drugs and other medical products.
In 1943, one of his students, Fred Huber, synthesized diphenhydramine. Rieveschl worked with Parke-Davis to test the compound, and the company licensed the patent from him. In 1947 Parke-Davis hired him as their director of research. While he was there, he led the development of a similar drug, orphenadrine. [5]