[Show abstract][Hide abstract] ABSTRACT:
The in vitro dissolution and the bioavailability of two pharmaceutical formulations of digoxin were compared, one being a common commercial tablet form and the other a solution of the glycoside in soft gelatin capsules. Digoxin capsules dissolved more readily in vitro and showed higher bioavailability than digoxin tablets in both dogs and humans. In dogs, the capsules and tablets were compared with an elixir of digoxin, which possesses complete bioavailability. The better bioavailability of digoxin capsules as compared with tablets may be explained by the fact that this formulation contains the cardiac glycoside in a solution.
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