title: The advantage of polymer addition to a non-ionic oil in water microemulsion for the dermal delivery of progesterone.
abstract: The influence of progesterone on the physicochemical behaviour of the o/w microemulsion consisting of the non-ionic surfactant polyoxyethylene-10-dodecyl ether, tributyrin and water was investigated. Thereby no significant influence could be detected in terms of droplet size, zeta potential, conductivity and pH by progesterone. However the chemical stability of progesterone was insufficient during the storage of 6 months. Therefore, two different polymeric agents, named silicon dioxide and polymeric emulsifier, were added to the progesterone containing microemulsions. These polymers increased the chemical stability of progesterone significantly. Moreover the polymeric additives improved the skin permeation 1.24- and 1.63-fold and decreased the skin retention in relation to the pure microemulsion. The polymer-stabilized progesterone microemulsions are interesting vehicles for skin application of progesterone.
authors.affiliation: Department of Pharmaceutical Technology and Biopharmaceutics, University of Vienna, Althanstrasse 14, 1090 Vienna, Austria.
authors.forename: Babette
authors.initials: B
authors.lastname: Biruss
authors.forename: Claudia
authors.initials: C
authors.lastname: Valenta
mesh_terms: D000279:Administration, Cutaneous; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D002851:Chromatography, High Pressure Liquid; D004553:Electric Conductivity; D004655:Emulsions; D005079:Excipients; D006863:Hydrogen-Ion Concentration; D009821:Oils; D010316:Particle Size; D011108:Polymers; D011374:Progesterone / Q000008:administration & dosage*; D012212:Rheology; D012822:Silicon Dioxide; D012869:Skin Absorption; D013501:Surface-Active Agents; D013696:Temperature; D014783:Viscosity; D014867:Water
chemical_list: D004655:Emulsions; D005079:Excipients; D009821:Oils; D011108:Polymers; D013501:Surface-Active Agents; D014867:Water; D011374:Progesterone; D012822:Silicon Dioxide