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Diphenhydramine, while traditionally known as an antagonist, acts primarily as an inverse agonist of the histamine H 1 receptor. [86] It is a member of the ethanolamine class of antihistaminergic agents. [45] By reversing the effects of histamine on the capillaries, it can reduce the intensity of allergic symptoms.
Antihistamines that target the histamine H 1 -receptor are used to treat allergic reactions in the nose (e.g., itching, runny nose, and sneezing). In addition, they may be used to treat insomnia, motion sickness, or vertigo caused by problems with the inner ear. H 2 -antihistamines bind to histamine H 2 receptors in the upper gastrointestinal ...
Benadryl Allergy. Benadryl Allergy is the name of a Benadryl product found in the United States and Canada. It is an antihistamine drug used to relieve allergies. Its active ingredient is diphenhydramine, a first-generation antihistamine. It is known to be sedative, making drowsiness a common side effect.
Extrapyramidal symptoms (EPS) are symptoms that are archetypically associated with the extrapyramidal system of the brain's cerebral cortex. When such symptoms are caused by medications or other drugs, they are also known as extrapyramidal side effects (EPSE). The symptoms can be acute (short-term) or chronic (long-term).
Diphenhydramine (often referred to by the trade name Benadryl) is an anticholinergic antihistamine medicine commonly used to treat allergic reactions and symptoms of a common cold, such as coughing. Its central antihistaminergic properties also cause it to act as a sedative , and for this reason it is also used to treat insomnia . [ 24 ]
Health impacts of endocrine disruptors. The growing scientific literature suggests that endocrine disruptors could play a part in conditions including attention deficit disorder and impulse ...
Effects generally begin within thirty minutes and last for about a day. [6] The degree of benefit is similar to other antihistamines such as diphenhydramine, which is a first-generation antihistamine. [6] Common side effects include sleepiness, dry mouth, headache, and abdominal pain. [6]
Diphenhydramine is the primary constituent of dimenhydrinate and dictates the primary effect. The main differences relative to pure diphenhydramine are a lower potency due to being combined with 8-chlorotheophylline (by weight, dimenhydrinate is between 53% and 55.5% diphenhydramine) [8] and the fact that the stimulant properties of 8-chlorotheophylline help reduce the side ...