| S5447 | Triprolidine Hydrochloride | Triprolidine Hydrochloride is the hydrochloride salt form of Triprolidine, which is the first generation histamine H1 antagonist used in allergic rhinitis. | Selective |  | 
            
                
                    | S0897 | Cyclizine | Cyclizine is a piperazine first-generation antagonist of histamine 1 receptor. | Selective |  | 
            
                
                    | S5864 | Levocetirizine | Levocetirizine (LCZ, (R)-Cetirizine), the R-enantiomer of cetirizine, is an antagonist of histamine H(1) receptor. | Selective |  | 
            
                
                    | S5196 | Promethazine | 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. | Selective |  | 
            
                
                    | S4696 | CarbinoxaMine Maleate | Carbinoxamine maleate is a histamine-H1 receptor blocking agent with antihistamine and anticholinergic properties. | Selective |  | 
            
                
                    | S5647 | Emedastine Difumarate | Emedastine Difumarate (Rapimine, Emedastine fumarate) is the difumarate salt form of emedastine, a second generation, selective histamine H1 receptor antagonist with anti-allergic activity. | Selective |  | 
            
                
                    | S4849 | Levocetirizine Dihydrochloride | Levocetirizine (Xyzal, (-)-Cetirizine) is the active R-enantiomer of cetirizine and represents a new second-generation histamine H1 antagonist. | Selective |  | 
            
                
                    | S3913 | Pimethixene maleate | Pimethixene (Pimetixene) maleate, an antihistamine, anntimigraine agent and antiserotonergic compound, is a highly potent antagonist of a broad range of monoamine receptors, including a variety of serotonin receptors. Pimethixene maleate inhibits 5-HT2A, 5-HT2B, 5-HT2C, 5-HT1A, 5-HT1B, 5-HT6, 5-HT7, Adrenergic α-1A, Dopamine D1 Receptor, Dopamine D2 Receptor, Dopamine D4.4 Receptor, Histamine H1 Receptor, Muscarinic M1 and Muscarinic M2 with pKi of 10.22, 10.44, 8.42, 7.63, < 5, 7. | Selective | Histamine H1 Receptor, pKi: 10.14 | 
            
                
                    | S5659 | Emedastine | Emedastine is a potent, high affinity histamine H1-receptor-selective antagonist with Ki of 1.3 ±0.1 nM for H1-receptors while considerably weaker at H2- (K1 = 49,067 ± 11,113 nM) and H3-receptors (Ki = 12,430 ± 1,282 nM). | Selective | H1 receptor, Ki: 1.3 nM | 
            
                
                    | S1847 | Clemastine fumarate | Clemastine fumarate is a selective histamine H1 receptor antagonist with IC50 of 3 nM. Clemastine stimulates autophagy via mTOR pathway. | Selective | Histamine H1 receptor, IC50: 3 nM | 
            
                
                    | S4625 | Alcaftadine | Alcaftadine (Lastacaft, R89674) is a high affinity ligand for the H1 receptor, with a pKi (8.5) that is comparable with that of other H1 antihistamines. Alcaftadine is also an antagonist for H2 and H4 receptors with no affinity for the H3 receptor. | Selective | H1 receptor, pKi: 8.5 | 
            
                
                    | S0398 | Astemizole | Astemizole (R 43512) is a histamine H1-receptor antagonist with IC50 of 4.7 nM. Astemizole is also a potent inhibitor of ether à-go-go 1 (Eag1) and Eag-related gene (Erg) potassium channels. Astemizole has antineoplastic and antipruritic effects. | Selective | H1 receptor, IC50: 4.7 nM | 
            
                
                    | S1816 | Chlorpheniramine Maleate | Chlorpheniramine Maleate (Chlorpheniramine maleate, Chlorphenamine, NCI-C55265) is an histamine H1 receptor antagonist with IC50 of 12 nM. | Selective | Histamine H1 receptor, IC50: 12 nM | 
            
                
                    | S4026 | Hydroxyzine 2HCl | Hydroxyzine is a histamine H1-receptor antagonist, inhibits binding of [3H]pyrilamine/[3H]desloratadine to human histamine H1 receptor with IC50 of 10 nM/19 nM. | Selective | Histamine H1 receptor, IC50: 10 nM-19 nM | 
            
                
                    | S3721 | Bilastine | Bilastine is a new, well-tolerated, nonsedating H1 receptor antihistamine and has a rapid onset and prolonged duration of action. | Selective | H1 receptor, Ki: 44.15 nM | 
            
                
                    | S2107 | Mizolastine | Mizolastine (SL 850324) 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. | Selective | Histamine H1 receptor, IC50: 47 nM | 
            
                
                    | S4012 | Desloratadine | Desloratadine (SCH-34117, NSC 675447) is a potent antagonist for  human histamine H1 receptor with IC50 of 51 nM. | Selective | Histamine H1 receptor, IC50: 51 nM | 
            
                
                    | S3052 | Rupatadine Fumarate | Rupatadine is an inhibitor of PAFR and histamine (H1) receptor with Ki of 550 nM and 102 nM, respectively. | Selective | Histamine H1 receptor, Ki: 102 nM | 
            
                
                    | S3208 | Fexofenadine HCl | Fexofenadine (MDL 16455A) inhibits histamine H1 receptor with IC50 of 246 nM. | Selective | Histamine H1 receptor, IC50: 246 nM | 
            
                
                    | S3037 | Bepotastine Besilate | Bepotastine Besilate (TAU 284) is a non-sedating, selective antagonist of histamine 1 (H1) receptor with pIC50 of 5.7. | Selective | Histamine H1 receptor, pIC50: 5.7 | 
            
                
                    | S1358 | Loratadine (SCH29851) | Loratadine (Alavert,Claritin,SCH29851) is a histamine H1 receptor antagonist, used to treat allergies. Also acts as a selective inhibitor of B(0)AT2 with IC50 of 4 μM. | Selective | H1 receptor, : ; B(0)AT2, IC50: 4 μM | 
            
                
                    | S3146 | Tripelennamine HCl | Tripelennamine (Pyribenzamine) is a widely used H1 antagonist, inhibiting PhIP glucuronidation with IC50 of 30 μM. | Selective | H1 receptor, IC50: 30 μM | 
            
                
                    | S4240 | Doxylamine Succinate | Doxylamine succinate competitively inhibits histamine at H1 receptors with substantial sedative and anticholinergic effects. | Selective |  | 
            
                
                    | S4139 | Cyclizine 2HCl | Cyclizine 2HCl is a piperazine derivative with Histamine H1 receptor antagonist activity. | Selective |  | 
            
                
                    | S2585 | Brompheniramine hydrogen maleate | Brompheniramine hydrogen maleate(Brompheniramine maleate) is a histamine H1 receptors antagonist. | Selective |  | 
            
                
                    | S1986 | Meclizine 2HCl | Meclizine (NSC 28728,Meclozine dihydrochloride) is a histamine H1 receptor antagonist used to treat nausea and motion sickness, has anti-histamine, anti-muscarinic and anti-oxidative phosphorylation properties, also an agonist ligand for mCAR (constitutive androstane receptor) and an inverse agonist for hCAR. | Selective |  | 
            
                
                    | S1866 | Diphenhydramine HCl | Diphenhydramine HCl is a first-generation histamine H1 receptor antagonist, used in various allergic conditions such as rhinitis, urticaria and conjunctivitis. | Selective |  | 
            
                
                    | S4008 | Pemirolast potassium | Pemirolast potassium (BMY26517) is a histamine H1 antagonist and mast cell stabilizer that acts as an antiallergic agent. | Selective |  | 
            
                
                    | S4353 | Terfenadine | Terfenadine is an antihistamine, generally completely metabolizes to the active form fexofenadine in the liver by the enzyme cytochrome P450 CYP3A4 isoform.  Terfenadine ((±)-Terfenadine) is a potent open-channel blocker of hERG with an IC50 of 204 nM. Terfenadine, an H1 histamine receptor antagonist, acts as a potent apoptosis inducer in melanoma cells through modulation of Ca2+ homeostasis. Terfenadine induces ROS-dependent apoptosis, simultaneously activates Caspase-4, -2, -9. | Selective |  | 
            
                
                    | S2024 | Ketotifen Fumarate | Ketotifen Fumarate(HC 20511 fumarate) is a fumaric acid salt of ketotifen which is a H1-antihistamine and mast cell stabilizer. | Selective |  | 
            
                
                    | S4262 | Ebastine | Ebastine(LAS-W 090,RP64305) is a potent H1-histamine receptor antagonist, used for allergic disorders. | Selective |  | 
            
                
                    | S4117 | Histamine Phosphate | Histamine(Histamine diphosphate) acts directly on the blood vessels to dilate arteries and capillaries mediated by both H 1- and H 2-receptors. | Pan |  | 
            
                
                    | S4118 | Histamine 2HCl | Histamine(Ceplene) is an organic nitrogen compound, acts on target cells in mammalian brain via stimulation of Histamine 1/2. | Pan |  |