receptor

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Related to H1 receptors: H1 receptor antagonist, HRH1
See: receiver
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Hasegawa, "Histamine H1 receptor antagonist blocks histamine-induced proinflammatory cytokine production through inhibition of Ca2+-dependent protein kinase C, Raf/MEK/ERK and IKK/IkB/NF-[kappa]B signal cascades," Biochemical Pharmacology, vol.
H1 receptor activates phospholipase C and causes smooth muscle contraction especially in intestine.
Histamine is the main component of granules and, once released, acts mainly via H1 receptors to trigger vasodilation and increased vascular permeability.
Madam, cetirizine hydrochloride, an antihistamine, is the active constituent of Zyrtec(r) that functions as competitive peripheral H1 receptor inhibitor.1 Cetirizine is known to have reduced blood-brain barrier penetration due to its larger mass, lipophobic properties and increased attraction for peripheral H1 receptors.
Using an X-ray beam 100 billion times stronger than normal, they got a 3D picture of the shape of H1 receptors - the protein drugs protect from allergy-causing histamines.
Most potent pharmacological action of mirtazapine is blockade of histamine H1 receptors. Its second most potent pharmacological action is blockade of the 5-HT2 family of receptors.
Medications that block H1 receptors increase appetite by reducing leptin's central activity.