Chapter 3

Biopharmaceutics and Pharmacokinetic Introduction

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Absorption of Different Salt Forms

Absorption of Different Salt Forms

redrawn from Juncher and Raaschou, 1957

Fig 3.16.1 Slide showing plasma penicillin concentration versus time curve after oral administration of various salts. The rate at which a drug dissolves is dependent on the solubility of the drug. A common occurrence is that different salts will have quite different solubility characteristics, and again somewhat different to the free acid (or base) form. In the case of penicillin V it appears that only drug which is dissolved quickly can be absorbed.
References


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