astemizole

Astemizole (Laridal) 是一种长效、非镇静抗组胺药，用于治疗季节性过敏性鼻炎、哮喘、过敏性结膜炎和慢性特发性荨麻疹。它是组胺 H1 受体的拮抗剂，IC50值为 4 nM，还阻断 hERG K+通道，IC50值为 0.9 nM，具有抗胆碱能和止痒作用。

Tecastemizole (R 43512) 是 H1 受体的选择性拮抗剂，是阿司咪唑的主要代谢产物，具有抗炎作用。

Noberastine citrate, a histamine H1 antagonist, has potent and specific peripheral antihistaminic activity. Noberastine, a furan derivative of nor-astemizole (an astemizole metabolite), has been shown to have a more rapid onset, and shorter duration of action than astemizole with peak antihistaminic activity at 4h following ingestion. Noberastine is rapidly absorbed and the peak plasma levels are obtained within 2 h of oral dosing. In preclinical studies Noberastine has been shown to lack central nervous system effects. After subacute (steady-state) administration of noberastine, there was increasing inhibition of weal and flare formation with higher doses of the drug. The 30 mg daily dose showed maximum antihistaminic effects.

Noberastine maleate, a histamine H1 antagonist, has potent and specific peripheral antihistaminic activity. Noberastine, a furan derivative of nor-astemizole (an astemizole metabolite), has been shown to have a more rapid onset, and shorter duration of action than astemizole with peak antihistaminic activity at 4h following ingestion. Noberastine is rapidly absorbed and the peak plasma levels are obtained within 2 h of oral dosing. In preclinical studies Noberastine has been shown to lack central nervous system effects. After subacute (steady-state) administration of noberastine, there was increasing inhibition of weal and flare formation with higher doses of the drug. The 30 mg daily dose showed maximum antihistaminic effects.