Astemizole D3

Astemizole D3 is a potent antihistamine drug used for the treatment of allergic rhinitis, chronic urticaria, and other allergic conditions. It is a derivative of Astemizole, a non-sedating second-generation antihistamine that was withdrawn from the market due to its potential to cause cardiac arrhythmias. Astemizole D3 is a deuterated form of Astemizole and is used as a reference standard for the quantification of Astemizole in biological samples. Astemizole D3 acts by blocking the histamine H1 receptors in the body, thereby reducing the symptoms of allergic reactions such as itching, sneezing, and runny nose. It also has a long duration of action and is effective in treating both acute and chronic allergic conditions. Astemizole D3 is a white to off-white crystalline powder that is soluble in methanol and slightly soluble in water. Its chemical formula is C28H31D3N4O, and its molecular weight is 444.65 g/mol. It is stable under normal conditions and can be stored at room temperature. In conclusion, Astemizole D3 is a useful reference standard for the quantification of Astemizole in biological samples. It is a potent antihistamine drug that is effective in treating allergic conditions, and its long duration of action makes it a preferred choice for chronic conditions.