In-vitro release studies op chlorpheniramine maleate from topical bases using cellulose membrane and hairless mouse skin

Abstract In-vitro release of chlorpheniramine maleate from various topical bases was studied using cellulose membrane and hairless mouse skin as the diffusion barriers. These included a polymer gel base, a modified hydrophilic ointment base and a modified petrolatum base. The effects of the additive ingredients, such as, urea, ethanol and dimethylsulfoxide (DMSO) on the drug release were also investigated. The rank order of drug release through the cellulose membrane was observed to be: the gel base > the modified hydrophilic ointment base > the modified hydrophilic petrolatum base. In general, the presence of additives adversely affected the drug release except for the (DMSO) and ethanol in certain cases. The samples with maximum drug release through the cellulose membrane were further studied for the drug release using hairless mouse skin as the diffusion barrier. Here again, the gel base gave the best in-vitro release of the drug, and the data correlated well with the results obtained through the cellulose membrane. These data were treated with various kinetic principles to determine the relevant parameters, such as, the steady state flux, the diffusion coefficient and the permeability coefficient etc. Using these information, the samples were evaluated for delivering drug via diadermatic dosage form.