Study of in Vitro Kinetics and Liberation Mechanism of Pentoxifylline from Coated Pellets and Compacts Based on 2-Hydroxyethylmethacrylate-Butyl Acrylate Copolymer

Determination of pentoxifylline in serum by high-performance thin-layer chromatography

An analytical method to study the bioavailability of newly developed pentoxifylline sustained-release tablets has been developed and assessed in experiments on dogs. For the isolation of pentoxifylline and its metabolites from serum solid-liquid extraction was applied by involving the internal standard probe. HPTLC plates with a preconcentration zone were used for separation of the analysed substances, using chloroform-methanol (95:5, v/v). Quantification was by densitometric detection. The detector response was linear in the concentration range investigated for pentoxifylline: 0.02-1.5 micrograms ml-1 of serum.