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The most prominent side effects are dizziness and sleepiness. [42] Diphenhydramine is a potent anticholinergic agent and potential deliriant in higher doses. This activity is responsible for the side effects of dry mouth and throat, increased heart rate, pupil dilation, urinary retention, constipation, and, at high doses, hallucinations or ...
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.
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]
Diphenhydramine hydrochloride is also marketed as an antihistamine in Canada under the same name, and is only listed in the Canadian Agricultural database for equine use. [5] However, a 2019 manual for counseling professionals in Canada included Sominex as a medicine to be used for the treatment of Parkinson's tremors and stiffness related to ...
Clinically, H 1-antihistamines are used to treat allergic reactions and mast cell-related disorders. Sedation is a common side effect of H 1-antihistamines that readily cross the blood–brain barrier; some of these drugs, such as diphenhydramine and doxylamine, may therefore be used to treat insomnia.
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]
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) [10] and the fact that the stimulant properties of 8-chlorotheophylline help reduce the side ...
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 ...