Astemizole, is used as a potent and selective H1-receptor antagonist that displays antihistamine and antimalarial activity. It is also been used as a chaperone to correct folding defects and restore protein function for some mutated forms of hERG channels.

This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.