Cetirizine: Effects, Applications, Side Effects

How cetirizine works As a so-called H1 antihistamine, cetirizine blocks the docking sites (H1 receptors) of the body’s own messenger substance histamine – a substance that occurs everywhere in the body and is involved in normal concentrations in important processes such as the immune response, the production of stomach acid and the regulation of sleep. … Cetirizine: Effects, Applications, Side Effects