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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]
Hypophosphatemia is an electrolyte disorder in which there is a low level of phosphate in the blood. [1] Symptoms may include weakness, trouble breathing, and loss of appetite. [1]
Histamine dihydrochloride acts by improving the immune-enhancing properties of IL-2, and laboratory studies have shown that this combination can induce immune-mediated killing of leukemic cells. [7] The treatment (in the form of subcutaneous injections) is given in 3-week cycles by the patients at home for 18 months, thus coinciding with the ...
Histamine, a biogenic amine found in various food products, is frequently implicated as a potential instigator of a range of health issues. [1] These issues are often collectively referred to under the umbrella term "histamine intolerance", [1] formulated drawing parallels to "lactose intolerance", a condition resulting from lactase enzyme deficiency.
Hydrochloride [9] and phosphorus [10] salts form white hygroscopic crystals and are easily dissolved in water or ethanol, but not in ether. In aqueous solution , the imidazole ring of histamine exists in two tautomeric forms, identified by which of the two nitrogen atoms is protonated.
Histidine decarboxylase is the primary biological source of histamine. Histamine is an important biogenic amine that moderates numerous physiologic processes. There are four different histamine receptors, H 1, H 2, H 3, and H 4, [16] each of which carries a different biological significance.
Eugeroics are different from traditional CNS stimulants such as amphetamine in that they have fewer side effects and lower abuse potential. Pitolisant is the first eugeroic drug that acts by blocking the histamine H 3 autoreceptor, which increases the activity of histamine neurons in the brain. Pitolisant has been shown to be effective and well ...
H 1 antagonists, also called H 1 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 action but are not true antihistamines.