Most Egyptian doctors now adhere to the practice of evidence-based medicine and diagnostic and therapeutic guidelines emanating from American and European medical societies. (mustefa). So this is the main problem I have with alternative medicine, because in general its interventions have not been subjected to rigorous study. (Herbal medicines require further research to better understand how they work and allow prediction of their effects. How to take herbal medicines safely. The industry needs to establish guidelines regarding adulteration and contamination. Manufacturers who provide ineffective, toxic, or mislabeled medications not only harm the industry, but also endanger the health and well-being of their customers.