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Example of a H-1 antihistamine (Levocetirizine) Side effects. Side effects generally exist more in first-generation antihistamines, for example drowsiness, blurred vision and dry mouth. Other common side effects for all generations include gastrointestinal side effects, headaches and tiredness. [9]
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]
The most common adverse effects noted for second-generation agents include drowsiness, fatigue, headache, nausea and dry mouth. [4] Continuous and/or cumulative use of anticholinergic medications, including first-generation antihistamines, is associated with higher risk for cognitive decline and dementia in older people. [8] [9]
As an antihistamine, doxylamine is an inverse agonist of the histamine H 1 receptor. As a first-generation antihistamine, it typically crosses the blood–brain barrier into the brain, thereby producing a suite of sedative and hypnotic effects that are mediated by the central nervous system. (N.b.:
Cetirizine is a second-generation antihistamine used to treat allergic rhinitis (hay fever), dermatitis, and urticaria (hives). [5] It is taken by mouth. [6] 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 ...
Common side effects include headache, sore throat, eye discomfort, or changes in perception of taste. [3] [2] More significant side effects may include sleepiness. [2] It is unclear if use during pregnancy or breastfeeding is safe. [4] It is an antihistamine and mast cell stabilizer. [5] [2] Olopatadine was patented in 1986 and came into ...
Antihistamines are drugs which treat allergic rhinitis, common cold, influenza, and other allergies. [1] Typically, people take antihistamines as an inexpensive, generic (not patented) drug that can be bought without a prescription and provides relief from nasal congestion, sneezing, or hives caused by pollen, dust mites, or animal allergy with few side effects. [1]