Which medication is mostly absorbed in the intestines rather than the stomach?

Sodium bicarbonate is primarily absorbed in the stomach, as it acts quickly to neutralize gastric acid but does not have a significant absorption occurring in the intestines. In contrast, ascorbic acid, which is vitamin C, is absorbed mainly in the intestines. Salicylic acid is another substance that undergoes more extensive absorption in the intestines rather than the stomach, but it is less commonly referenced in this specific context than ascorbic acid. Glucose is also absorbed predominantly in the intestines as part of carbohydrate digestion and absorption.

Focusing on ascorbic acid, it is a water-soluble vitamin that relies on active transport mechanisms in the intestines to be absorbed effectively, especially in the proximal small intestine. This absorption mechanism is efficient and reflects why ascorbic acid is largely absorbed in the intestines.