Rathod Garuji*, G. Ganesh Kumar
Srikrupa Institute of Pharmaceutical Sciences,
Velikatta, Kondapak, Siddipet,
Transdermal drug delivery is an alternative route for systemic drug delivery which minimizes the absorption and increases the bioavailability. Orally lornoxicam has a short elimination half-life (3-4 hrs.), low oral bioavailability undergoes extensive first pass metabolism and frequent high doses are required to maintain the therapeutic level as a result, dose development toxic effect. The purpose of this research work was to formulation and evaluation of lornoxicam transdermal patches using various polymers such as HPMC, Eudragit RL 100 and Eudragit RS 100 by solvent evaporation technique for improvement of bioavailability of drug and reducing toxic effects. The prepared formulations were evaluated for different physicochemical characteristics like thickness, folding endurance, drug content, percentage moisture absorption, percentage moisture loss and weight uniformity. Drug-excipient interaction studies were carried out using Fourier transform infrared (FTIR) spectroscopy technique.The diffusion studies were performed by using modified Franz diffusion cells. The result of diffusion study shows that formulation, F2 showed maximum release of 94.19 % in 24 h, whereas F5 showed minimum release of 51.59 % in 24 h. Based on the drug release and physicochemical values obtained the formulation F2 is considered as an optimized formulation which shows higher percentage of drug release of 94.19 % in 24 h. The developed transdermal patches increase the therapeutic efficacy and reduced toxic effect of lornoxicam.