Levodropropizine (DF-526) is a histamine receptor inhibitor, Levodropropizine is an effective and very well tolerated peripheral antitussive drug.
CP19, a histamine receptor antagonist, is an entry inhibitor against both Ebolavirus (EBOV) and Marburgvirus (MARV) with IC50s of 3.4 μM and 29.5 μM, respectively. CP19 has SI values of 29.4 and 3.4 for EBOV and MARV, respectively. CP19 has antiviral activity[1].
Cetirizine methyl ester is an impurity of Cetirizine (HY-17042). Cetirizine, a second-generation antihistamine and the carboxylated metabolite of hydroxyzine, is a specific, orally active and long-acting histamine H1-receptor antagonist[1].
ST-1006 maleate is a potent histamine H4 receptor agonist with a pKi value of 7.94. ST-1006 maleate has anti-inflammatory effect[1][2].
Meclizine D8 (Meclozine D8) is a deuterium labeled Meclizine. Meclizine is a histamine H1 receptor antagonist and has the potential to treat nausea and motion sickness. Meclizine is an agonist ligand for mouse constitutive androstane receptor (CAR) and an inverse agonist for Human CAR[1][2][3].
Osthole is a natural antihistamine alternative. Osthole may be a potential inhibitor of histamine H1 receptor activity.
Loratadine(SCH-29851) is a selective inverse peripheral histamine H1-receptor agonist with an IC50 of >32 μM.IC50 value: 32 uMTarget: H1-receptorLoratadine is a non-sedative antihistamine that inhibits histamine-induced activities of IL-6 and IL-8 secretion in endothelial cells.
Ebastine-d5 (LAS-W 090-d5) is the deuterium labeled Ebastine. Ebastine (LAS-W 090) is an orally active, second-generation histamine H1 receptor antagonist. Ebastine can be used for the symptoms of allergic rhinitis and chronic idiopathic urticaria research[1][2].
Astemizole, a second-generation antihistamine drug to diminish allergic symptoms with a long duration of action, is a histamine H1-receptor antagonist, with an IC50 of 4 nM. Astemizole also shows potent hERG K+ channel blocking activity with an IC50 of 0.9 nM. Astemizole has anticholinergic and antipruritic effects[1][2].
Roxatidine acetate is a potent, selective, competitive and orally active histamine H2-receptor antagonist. Roxatidine acetate has antisecretory potency against gastric acid secretion. Roxatidine acetate can also suppress inflammatory responses and can be used for gastric and duodenal ulcers research. Roxatidine acetate has antitumor activity[1][2][3].
Doxepin D3 Hydrochloride is a deuterium labeled Doxepin Hydrochloride. Doxepin hydrochloride is an orally active tricyclic antidepressant used as a sedative. Doxepin hydrochloride is a potent and selective histamine receptor H1 antagonist. Doxepin hydrochloride is also a potent CYP450 inhibitor and significantly inhibits CYP450 2C19 and 1A2[1][2].
Onitin is a natural product, that can be isolated from Onychium siliculosum. Onitin is also a non-competitive antagonist of histamine. Onitin shows activity in blocking the peristaltic reflex of the guinea-pig ileum, in inhibition of the responses of guinea-pig ileum to histamine and of inhibition of the responses of guinea-pig tracheal muscle to histamine[1].
Acreozast (TYB-2285) is a histamine release inhibitor. Acreozast inhibits the histamine release primed with IL-3. Acreozast might regulate allergic inflammation in vivo by the suppression of mediator release primed with IL-3[1].
Tesmilifene fumarate (DPPE fumarate), an H1C receptor antagonist, potentiates a wide range of cytotoxics and even to offer some protection of normal cells[1][2].
Dothiepin (Dosulepin; Dothep) is an antidepressant agent with sedative/anxiolytic activity. Dothiepin is an inhibitor preferring of noradrenaline uptake than serotonin uptake. Dothiepin facilitates noradrenergic neurotransmission via inhibiting the neuronal uptake. Dothiepin is also an antagonist of histamine H1-receptor without cardiotoxicity. Dothiepin exhibits significant analgesic activity in psychogenic facial pain，idiopathic fibromyalgia syndrome or rheumatoid arthritis[1].
Antihistamine-1 is a H1-antihistamine (Ki=6.9 nM) with acceptable blood-brain barrier penetration and also an inhibitor of CYP2D6 and hERG channel with IC50s of 5.4 and 0.8 μM, respectively.
Thiethylperazine dimaleate is a phenothiazine derivate, and an orally active dopamine D2-receptor and histamine H1-receptor antagonist. Thiethylperazine dimaleate is also a slective ABCC1activator that reduces amyloid-β (Aβ) load in mice. Thiethylperazine dimaleate has anti-emetic, antipsychotic and antimicrobial effects[1][2][3].
A 331440 hydrochloride is a histamine H3 receptor antagonist. A 331440 hydrochloride binds potently and selectively to human and rat histamine H3 receptors (Ki≤25 nM). A 331440 hydrochloride can be used for antiobesity research[1].
Tripelennamine Hcl, a H1-receptor antagonist, is a psychoactive drug and member of the pyridine andethylenediamine classes that is used as an antipruritic and first-generation antihistamine.IC50 Value:Target: Histamine H1 receptorTripelennamine can be used in the treatment of asthma, hay fever, rhinitus and urticaria.in vitro: Arterial and mixed venous blood-gas and pH measurements were made at rest before and after saline or drug administration and during incremental exercise leading to maximal exertion at 14 m/s on 3.5% uphill grade for 120 s. Galloping at this workload elicited maximal heart rate and induced exercise-induced pulmonary hemorrhage in all horses in both treatments, thereby indicating that capillary stress failure-related pulmonary injury had occurred [1].in vivo: The data obtained (median and range in brackets) in camels and horses, respectively, were as follows: the terminal elimination half-lives were 2.39 (1.91-6.54) and 2.08 (1.31-5.65) h, total body clearances were 0.97 (0.82-1.42) and 0.84 (0.64-1.17)L/h/kg. The volumes of distribution at steady state were 2.87 (1.59-6.67) and 1.69 (1.18-3.50) L/kg, the volumes of the central compartment of the two compartment pharmacokinetic model were 1.75 (0.68-2.27) and 1.06 (0.91-2.20) L/kg [2]. After intramuscular administration of 50 or 100 mg tripelennamine, mean plasma concentrations at 30 minutes were 105 and 194 ng/ml, respectively, and mean plasma t1/2 values were 2.9 and 4.4 hours, respectively [3].
Phenindamine (Nu 1504) is an antihistamine[1].
Olopatadine HCl is a histamine blocker used to treat allergic conjunctivitis.Target: Histamine ReceptorOlopatadine is one of the second-generation histamine H1 receptor antagonists that are treated for allergic disorders. Olopatadine significantly inhibited the ear swelling and the increased production of IL-4, IL-1beta, IL-6, GM-CSF and NGF in the lesioned ear [1]. Olopatadine was highly and rapidly absorbed in healthy human volunteers. The urinary excretion of olopatadine accounted for not less than 58% and the contribution of metabolism was considerably low in the clearance of olopatadine in humans. Olopatadine is one of the few renal clearance drugs in antiallergic drugs. Olopatadine was shown to be useful for the treatment of allergic rhinitis and chronic urticaria in double-blind clinical trials [2]. AL-4943A inhibits histamine release in a concentration-dependent fashion (IC50 = 559 microM) from human conjunctival mast cell preparations in vitro. Passive anaphylaxis in guinea pig conjunctiva was attenuated by AL-4943A applied 30 min prior to intravenous or topical ocular antigen challenge (ED50 values 0.0067% and 0.0170%, w/v, respectively) [3].
N-acetylhistamine is a histamine metabolite. N-acetylhistamine can be used as a potential biomarker of histidine metabolism for anaphylactoid reactions.
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[1][2][3].
Dimenhydrinate is an anti-emetic and anti-histamine commonly available over-the-counter as a motion sickness remedy.
Immepip is a H3 agonist. Immepip can reduce cortical histamine release. Immepip can be used for the research of neurological diseases[1].
JNJ-5207852 is a selective and potent histamine H3 receptor (H3R) antagonist, with pKis of 8.9, 9.24 for rat and human H3R, respectively.
Mizolastine dihydrochloride 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. Target: Histamine H1-receptorMizolastine 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. It does not prevent the actual release of histamine from mast cells, just prevents it binding to receptors. Side effects can include dry mouth and throat.Mizolastine has demonstrated antiallergic effects in animals and healthy volunteers and anti-inflammatory activity in animal models. Double-blind trials have shown mizolastine to be significantly more effective than placebo and as effective as other second generation antihistamine agents, such as loratadine or cetirizine, in the management of patients with perennial or seasonal allergic rhinitis and in patients with chronic idiopathic urticaria. Available data also suggest that prophylactic administration of mizolastine is significantly more effective than placebo and as effective as prophylactic terfenadine in delaying the onset of symptoms of seasonal allergic rhinitis.
Latrepirdine dihydrochloride is a neuroactive compound with antagonist activity at histaminergic, α-adrenergic, and serotonergic receptors. Latrepirdine stimulates amyloid precursor protein (APP) catabolism and amyloid-β (Aβ) secretion.
UCB-35440, a 5-lipoxygenase inhibitor and a histamine H1 receptor antagonist, is used potentially for the treatment of dermatitis.
Oxatomide is a potent and orally active dual H1-histamine receptor and P2X7 receptor antagonist with antihistamine and anti-allergic activity. Oxatomide almost completely blocks the ATP-induced current in human P2X7 receptors (IC50 of 0.95 μM). Oxatomide inhibits ATP-induced Ca2+ influx with an IC50 value of 0.43 μM and also inhibits serotonin[1][2].