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Doxylamine and other first-generation antihistamines are the most widely used sleep medications in the world. [6] Typical side effects of doxylamine (at recommended doses) include dizziness, drowsiness, grogginess, and dry mouth, among others. [7] [4] As an antihistamine, doxylamine is an inverse agonist of the histamine H 1 receptor.
Pyridoxine/doxylamine, sold under the brand name Diclectin among others, is a combination of pyridoxine hydrochloride (vitamin B 6) and doxylamine succinate.It is generally used for nausea and vomiting of pregnancy (morning sickness); even though its efficacy has not been proven and subsequent research has led to the removal of recommendations in medical journals.
H. 1. antagonist. H1 antagonists, also called H1 blockers, are a class of medications that block the action of histamine at the H 1 receptor, helping to relieve allergic reactions. Agents where the main therapeutic effect is mediated by negative modulation of histamine receptors are termed antihistamines; other agents may have antihistaminergic ...
Acetylcholinesterase inhibitors ( AChEIs) also often called cholinesterase inhibitors, [ 1] inhibit the enzyme acetylcholinesterase from breaking down the neurotransmitter acetylcholine into choline and acetate, [ 2] thereby increasing both the level and duration of action of acetylcholine in the central nervous system, autonomic ganglia and ...
Doxepin is a medication belonging to the tricyclic antidepressant (TCA) [ 10] class of drugs used to treat major depressive disorder, anxiety disorders, chronic hives, and insomnia. [ 10][ 11] For hives it is a less preferred alternative to antihistamines. [ 10] It has a mild to moderate benefit for sleeping problems. [ 12]
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] Antihistamines are usually for short-term treatment. [ 1]
Common side effects include sleepiness, headache, and a dry mouth. [8] [9] Serious side effects may include QT prolongation. [9] It is unclear if use during pregnancy or breastfeeding is safe. [8] Hydroxyzine works by blocking the effects of histamine. [9] It is a first-generation antihistamine in the piperazine family of chemicals. [8] [4]
Anticholinergic. Anticholinergics ( anticholinergic agents) are substances that block the action of the acetylcholine (ACh) neurotransmitter at synapses in the central and peripheral nervous system. [ 1][ 2] These agents inhibit the parasympathetic nervous system by selectively blocking the binding of ACh to its receptor in nerve cells.