Rajab, N.A., Rassol, A.A.A., Assaf, S.M. and Sallam, A.- sayed A. 2014. PREPARATION AND EVALUATION OF FENTANYL TRANSDREMAL PATCHES USING LIDOCAINE AS A MODEL DRUG AND AZELAIC ACID AS A PENETRATION ENHANCER. International Journal of Pharmacy and Pharmaceutical Sciences. 6, 7 (Jul. 2014), 615–620.