JNJ-39758979 dihydrochloride is a selective, orally active, and high-affinity histamine H4 receptor antagonist, with Kis of 12.5, 5.3, and 25 nM for human, mouse, and monkey histamine H4 receptor, respectively. JNJ-39758979 dihydrochloride functionally antagonizes histamine-induced cAMP inhibition with a pA2 of 7.9 in transfected cells. JNJ-39758979 dihydrochloride shows good anti-inflammatory and antipruritic activity.

Methapyrilene (Thenylpyramine) hydrochloride is an orally active H1-receptor antihistamine and an anticholinergic agent of the pyridine chemical class. Methapyrilene hydrochloride has hepatotoxicity and can be used as a hepatotoxin that cause periportal hepatic necrosis in vivo

(Z)-Lafutidine ((Z)-FRG-8813) is a potent histamine H2 receptor antagonist. (Z)-Lafutidine shows anti-secretory and gastroprotective activities.

Promethazine is a potent histamine H1 receptor antagonist. Promethazine is a medication used in the management and treatment of allergic conditions, nausea and vomiting, motion sickness, and sedation. Promethazine exhibits antiparasitic properties.

Levocetirizine (LCZ, (R)-Cetirizine), the R-enantiomer of cetirizine, is an antagonist of histamine H(1) receptor.

Levocabastine hydrochloride is a long acting, highly potent and selective histamine H1-receptor antagonist with anti-allergic activity. Levocabastine hydrochloride is also a selective, high affinity neurotensin receptor subtype 2 (NTR2) antagonist, with a Ki of 17 nM for mNTR2.

Psoralenoside is a benzofuran glycoside from Psoralea corylifolia. Psoralenoside exhibits high binding affinities against histaminergic H1, calmodulin, and voltage-gated L-type calcium channels (E-value≥-6.5 Kcal/mol). Psoralenoside?shows estrogen-like activity, osteoblastic proliferation accelerating activity, antitumor effects and antibacterial activity.

Betahistine mesylate is an orally active histamine H1 receptor agonist and a H3 receptor antagonist. Betahistine mesylate is used for the study of rheumatoid arthritis (RA).

Betazole (Ametazole) dihydrochloride, a pyrazole analogue of histamine, is an orally active H2 receptor agonist. Betazole dihydrochloride induces gastric acid secretion, and causes an immediate and significant increase in common bile duct pressure. Betazole dihydrochloride has been used as a diagnostic agent known as histalog, for investigating gastric acid secretory capacity.

Thonzylamine is an orally active H1 histamine receptor antagonist, exhibits good antihistaminic and antianaphylactic properties. Thonzylamine can be used for the research of hypersensitivity diseases, nasal congestion, allergic conjunctivitis and other allergic diseases.

Oxomemazine is a phenothiazine-based histamine H1-receptor blocker with pronounced antimuscarinic properties. Oxomemazine is a selective antagonist for muscarinic M1 receptor, displays about 20-fold difference in the affinity for high (Ki = 84 nM, M1 receptor) and low (Ki = 1.65 μM, M2 receptor) affinity sites. Oxomemazine?an antihistamine and anticholinergic agent used for the study of cough treatment.

Cimetidine sulfoxide (Cimetidine sulphoxide) is a sulfoxide metabolite of Cimetidine. Cimetidine is a histamine H2-receptor antagonist. Cimetidine has the potential for peptic ulcer disease and upper gastrointestinal haemorrhage treatment.

Rupatadine D4 fumarate (UR-12592 D4 fumarate) is a deuterium labeled Rupatadine fumarate. Rupatadine Fumarate (UR-12592 Fumarate) is a potent dual PAF/H1 antagonist with Ki of 0.55/0.1 μM(rabbit platelet membranes/guinea pig cerebellum membranes).

Cetirizine Impurity C is an impurity of Cetirizine. Cetirizine, a second-generation antihistamine and the carboxylated metabolite of hydroxyzine, is a specific, orally active and long-acting histamine H1-receptor antagonist[1][2].

Niaprazine is a histamine H1-receptor antagonist with marked sedative properties. Niaprazine has antihistamine and antiserotonin activities and can be used for sleep disorder research.

Tesmilifene fumarate (DPPE fumarate), an H1C receptor antagonist, potentiates a wide range of cytotoxics and even to offer some protection of normal cells.

Cetirizine Impurity D is an impurity of Cetirizine. Cetirizine, a second-generation antihistamine, is a specific, orally active and long-acting histamine H1-receptor antagonist. Cetirizine marks antiallergic properties and inhibits eosinophil chemotaxis during the allergic response.

Betazole (Ametazole), a pyrazole analogue of histamine, is an orally active H2 receptor agonist. Betazole induces gastric acid secretion, and causes an immediate and significant increase in common bile duct pressure. Betazole has been used as a diagnostic agent known as histalog, for investigating gastric acid secretory capacity.

Cetirizine D8 is a deuterium labeled Cetirizine. Cetirizine, a second-generation antihistamine and the carboxylated metabolite of hydroxyzine, is a specific, orally active and long-acting histamine H1-receptor antagonist. Cetirizine marks antiallergic properties and inhibits eosinophil chemotaxis during the allergic response[1][2][3].

Tiotidine (ICI 125211) is a potent and selective antagonist of histamine H2-receptor (pA2=7.3-7.8 for guinea-pig right atrium). Tiotidine has low affinity for both the H1 and the H3 receptors.

Zotepine is a SR-2A and D2DR inhibitor (Ki values are 0.69 and 2.3 nM respectively). Zotepine is also a potent histamine H1 receptor antagonist (IC50 = 8.0 nM).

Seliforant (SENS-111, SENS111) is a novel potent, selective histamine H4 receptor antagonist..

Roxatidine Acetate Hydrochloride is a histamine H2-receptor antagonist used in ulcer treatment. This compound has been found to inhibit platelet function in vitro.

Pheniramine Maleate ia an antihistamine and vasoconstrictor.

Pemirolast Potassium (BMY 26517) is a histamine H1 antagonist and mast cell stabilizer that acts as an antiallergic agent.

MLR-1023 is a chemical compound which inhibits acid secretion in animal models and also acts as a bronchodilator in histamine-challenged animals.

Mizolastine is a histamine H1-receptor antagonist with IC50 of 47 nM used in the treatment of hay fever (seasonal allergic rhinitis), hives and other allergic reactions.

Mequitazine is a potent, nonsedative and long-acting histamine H1 antagonist.

Meclizine is a histamine H1 receptor antagonist used to treat nausea and motion sickness.

Loratadine(SCH-29851) is a selective inverse peripheral histamine H1-receptor agonist with an IC50 of >32 μM.