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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.
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.
245 million in 2015 [6] (3.34% of world population) Dermatitis is a term used for different types of skin inflammation, typically characterized by itchiness, redness and a rash. [1] In cases of short duration, there may be small blisters, while in long-term cases the skin may become thickened. [1] The area of skin involved can vary from small ...
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]
Dystonia. Dystonia is a neurological hyperkinetic movement disorder in which sustained or repetitive muscle contractions occur involuntarily, resulting in twisting and repetitive movements or abnormal fixed postures. [3] The movements may resemble a tremor. Dystonia is often intensified or exacerbated by physical activity, and symptoms may ...
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Bilastine is an antihistamine medication used to treat hives (), allergic rhinitis and itchy inflamed eyes (allergic conjunctivitis) caused by an allergy. [6] It is a second-generation antihistamine and takes effect by selectively inhibiting the histamine H 1 receptor, preventing these allergic reactions. [7]
Hydroxyzine works by blocking the effects of histamine. [9] It is a first-generation antihistamine in the piperazine family of chemicals. [8] [4] Common side effects include sleepiness, headache, and dry mouth. [8] [9] Serious side effects may include QT prolongation. [9] It is unclear if use during pregnancy or breastfeeding is safe. [8]