Biopharmaceutical evaluation of ferrous salts in form of oral long-acting tablets.

We determined the relative bioavailability in men of two preparations containing ferrous salts in the form of long-action tablets in relation to analogous conventional preparations in the from of drops and tablets. The comparison of the bioavailability of preparations slowly and quickly releasing the active substance did not show any prolonged effect and greater absorption of drugs slowly releasing the active substance along the alimentary tract.