title: In vitro percutaneous absorption of tenoxicam from pressure-sensitive adhesive matrices across the hairless mouse skin.
abstract: To investigate the feasibility of developing a new tenoxicam plaster, the effects of vehicles and penetration enhancers on the in vitro permeation of tenoxicam from a pressure-sensitive adhesive (PSA) matrices across the dorsal hairless mouse skin were studied. Vehicles employed in this study were propylene glycol (PG)-oleyl alcohol (OAI), PG-oleic acid (OA), and diethylene glycol monoethyl ether (DGME)-propylene glycol monolaurate (PGML) cosolvents with/without fatty acids. In this study, amines such as triethanolamine (TEA) and tromethamine (TM) were additionally used as a solubilizer. Among PSAs used, Duro-Tak 87-2510 showed much higher release rate than either Duro-Tak 87-2100 or Duro-Tak 87-2196. The relatively high flux rate was obtained with the formulation of DGME-PGML (40:60, v/v) with 3% OA and 5% TM, and the flux increased as a function of the dose; the initial flux up to 12 h was 4.98 +/- 1.38 microg/cm2/h at the tenoxicam dose of 50 mg/70 cm2. This flux was much higher than that of a commercial piroxicam patch (Trast) (1.24 +/- 0.73 microg/ cm2/hr) with almost only one-third that of the commercial patch. Therefore, these observations indicated that these composition of tenoxicam plaster may be practically applicable.
authors.affiliation: Laboratory of Pharmaceutics, College of Pharmacy, Dongduk Womer's University, Seoul, Korea.
authors.forename: H S
authors.initials: HS
authors.lastname: Gwak
authors.forename: I K
authors.initials: IK
authors.lastname: Chun
mesh_terms: D000269:Adhesives / Q000008:administration & dosage*; D000818:Animals; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000493:pharmacokinetics*; D008297:Male; D051379:Mice; D008812:Mice, Hairless; D010539:Permeability; D010894:Piroxicam / Q000008:administration & dosage* / Q000031:analogs & derivatives* / Q000493:pharmacokinetics*; D012869:Skin Absorption
chemical_list: D000269:Adhesives; D000894:Anti-Inflammatory Agents, Non-Steroidal; D010894:Piroxicam; C032801:tenoxicam