Bioavailability Study on a New Slow-Release Formulation of Ketoprofen

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Abstract
Four healthy subjects volunteered for a crossover bioavailability study to compare the rate and extent of absorption of plain capsules and new slow-release capsules of ketoprofen. The formulations were administered in two consecutive 4-day periods at the following dose schedules: 2 × 50 mg plain capsules t.i.d. and 150 mg slow-release capsules b.i.d. The plasma levels profile of unchanged ketoprofen was assessed by GLC during the 4th day of treatment with each formulation. The absorption from slow-release capsules was slower and more sustained than from plain capsules but almost complete. The bioavailability properties of new slow-release capsules of ketoprofen appear suitable for clinical use with reduced frequency of daily dosing.

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