(R)-Cetirizine is the (R)-enantiomer of the histamine H1 receptor antagonist and second generation antihistamine cetirizine.

Acrivastine (BW825C) is a short acting histamine 1 receptor antagonist for the treatment of allergic rhinitis.

Alcaftadine

Azatadine dimaleate is an histamine and cholinergic inhibitor with IC50 of 6.5 nM and 10 nM, respectively.

Azelastine HCl is a potent, second-generation, selective, histamine antagonist.

Bepotastine Beslilate (Bepreve) is a histamine H1 receptor anatagonist.

Bepotastine is a non-sedating, selective antagonist of the histamine 1 (H1) receptor.

Betahistine Dihydrochloride is a histamine H3 receptors inhibitor used as an antivertigo drug.

Betahistine is a strong affinity histamine H3 receptor antagonist and weak affinity agonist of histamine H1 receptors.

Bilastine is a selective histamine H1 receptor antagonist used for treatment of allergic rhinoconjunctivitis and urticaria.

Brompheniramine maleate is a histamine H1 receptors antagonist.

Carbinoxamine maleate is a histamine-H1 receptor blocking agent with antihistamine and anticholinergic properties.

Cetirizine 2Hcl, a second-generation antihistamine, is a major metabolite of hydroxyzine, and a racemic selective H1 receptor inverse agonist used in the treatment of allergies, hay fever, angioedema, and urticaria.

Chlorpheniramine maleate is an histamine H1 receptor antagonist with IC50 of 12 nM.

Chlorprothixene has strong binding affinities to dopamine and histamine receptors, such as D1, D2, D3, D5, H1, 5-HT2, 5-HT6 and 5-HT7, with Ki of 18 nM, 2.96 nM, 4.56 nM, 9 nM, 3.75 nM, 9.4 nM, 3 nM and 5.6 nM, respectively.

Cimetidine is a histamine-2 (H2) receptor antagonist.

Cinnarizine is a medication derivative of piperazine, and characterized as an antihistamine and a calcium channel blocker.

Ciproxifan is an antagonists of H3-type histamine receptors.

Ciproxifan maleate(FUB-359 maleate) is a highly potent and selective histamin H3-receptor antagonist with IC50 of 9.2 nM, with low apparent affinity at other receptor subtypes.

Contilisant is a neuroprotective, non-toxic, antioxidant, permeable ligand, showing in vitro pharmacological properties on the selected biological targets (hAChE IC50=0.53 uM.

Cyproheptadine hydrochloride is a migraine prophylactic and Non-selective SR-2A (5HT2) antagonist. Cyproheptadine hydrochloride is an inhibitor of Histamine H1 Receptor and SR-2C.

Desloratadine(Sch34117) is a potent antagonist for human histamine H1 receptor used to treat allergies.