A blocker of H1-histamine receptors of the first generation, derived from ethanolamine; eliminates the effects of histamine, mediated through this type of receptors. Promotes the local anaesthesia (when intaken, there is a short numbing of the mucous membranes in the mouth) - only in high doses, it blocks m-cholinergic receptors in the central nervous system, has sedative, hypnotic, antiemetic and antiparkinsonian effects. The therapeutic indications include: allergic conjunctivitis, allergic rhinitis, chronic urticaria, pruritic dermatoses, dermatographism, serum sickness.

The drug is a prodrug and is activated in the acidic environment of the secretory tubules in the parietal cells. It reduces basal and stimulated secretion regardless of the nature of the stimulus. Prescribed in case of erosive ulcerative diseases of the gastrointestinal tract and eradication of Helicobacter pylori in infected patients with gastric and duodenal ulcer.