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Ibuprofen a weak acid, in the stomach will be present in which of the given form?

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Ibuprofen a weak acid, in the stomach will be present in which of the given form?

(a) Ionized form mostly

(b) Non-ionized form mostly

(c) Half ionized and half no ionized

(d) Will form aggregate

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The above asked question is from Drugs Absorption in portion Absorption of Drugs of Drug Biotechnology

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The correct answer is (b) Non-ionized form mostly

To explain I would say: The pH of the stomach is 1.5. Ibuprofen being a weak acid will be in a unionized form in the stomach. At pH 7.4 in plasma, it will be in ionized form and in the same format pH 5 in the intestine.

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