Background: Dietary supplement "DS" products are sold in the pharmacies very widely. However, there is no specific approval or definition to the legal and scientific usage of such products.   
Objectives: We aim in this study to show the level of knowledge of pharmacists concerning the non-scientifically medically prescribed medication and formulas which is known as "Complementary and alternative medicines". Also, there is a variety of pharmacist's attitude concerning such treatment methods we need to evaluate and prove.
Material and methods: Questionnaire form to assess the knowledge and measure the attitude and practice of those pharmacists by direct meeting for the larger pharmacies and postal distribution for the lesser pharmacies.
Results: Based upon our study in hand, we affirm that there are several elements contributing in forming the general attitude and practice of pharmacists in treating with Dietary supplements.
Conclusion: knowledge of pharmacists of Dietary supplement (DS) products depends on both educational and environmental factors which form the knowledge base for them while dealing with customers and patients