Mechanism of action

Pantoprazole is a highly potent proton pump inhibitor. Chemically a weak base, it concentrates under the acidic conditions of parietal cell secretory canaliculi where it is converted to a cationic cyclic sulfonamide by rearrangement. This activated molecule binds to two sites of Hydrogen/Potassium ATPase (proton pump) in the gastric parietal cells, inactivating the system, which in turn blocks the final step of secretion of hydrochloric acid by these cells, producing a long lasting effect.

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