Faculty of Pharmacy Council (meeting number 645, held on 18/7/2017) approved the registration the doctoral thesis title of Pharmacist/ Elmontaser bellah Hamed Ali - Assistant Lecturer in Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Assiut University - Registered to obtain the Doctoral Degree of Philosophy in Pharmaceutical Sciences (Pharmaceutical Analytical Chemistry) Title: Analytical Study of Possible Pharmacokinetic Interaction Between Phosphodiesterase-5 Inhibitors and Certain Concomitantly Administered Drugs Under supervision of: 1- Prof. Dr./ Abdel Maaboud Ismail Mohamed, Professor of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Assiut University 2- Dr./ Azza Hesham Mansour, Lecturer of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Assiut University