title: Bioavailability of ibuprofen from matrix mini-tablets based on a mixture of starch and microcrystalline wax.
abstract: The bioavailability of ibuprofen from matrix mini-tablets based on microcrystalline wax and a starch derivative was tested. An oral dose of 300 mg of ibuprofen was administered to healthy volunteers (n=8) in a randomized cross-over study design either as a commercial matrix formulation (Ibu-Slow 600) or as mini-tablets (filled into hard gelatin capsules). The mini-tablets consisted of 60% ibuprofen, 15% Paracera M (wax), 22.5% DDWM (starch) and 2.5% triacetin (lubricant). t50% of the in vitro release was 4.5 and 5 h for the mini-tablet and Ibu-slow formulations, respectively. Both formulations behaved in vivo as sustained-release formulation; their HVDt50%Cmax value was determined at 5.6 and 5.1 h for the mini-tablet and Ibu-slow formulations, respectively. A significantly higher value of Cmax was seen for the mini-tablet formulation, resulting in a relative bioavailability of 116 +/- 22.6% compared to the Ibu-slow matrix. These data demonstrate that the experimental mini-tablets can be used to formulate sustained-release dosage forms.
authors.affiliation: Laboratory of Pharmaceutical Technology, Gent University, Belgium.
authors.forename: C
authors.initials: C
authors.lastname: De Brabander
authors.forename: C
authors.initials: C
authors.lastname: Vervaet
authors.forename: J P
authors.initials: JP
authors.lastname: Görtz
authors.forename: J P
authors.initials: JP
authors.lastname: Remon
authors.forename: J A
authors.initials: JA
authors.lastname: Berlo
mesh_terms: D000328:Adult; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000097:blood / Q000493:pharmacokinetics*; D001682:Biological Availability; D018592:Cross-Over Studies; D006801:Humans; D007052:Ibuprofen / Q000097:blood / Q000493:pharmacokinetics*; D008297:Male; D008875:Middle Aged; D013213:Starch / Q000493:pharmacokinetics*; D018709:Statistics, Nonparametric; D013607:Tablets; D014885:Waxes / Q000493:pharmacokinetics*
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal; D013607:Tablets; D014885:Waxes; D013213:Starch; D007052:Ibuprofen