UMR 152 PharmaDev, Universite Paul Sabatier, Institut de Recherche pour le Developpement 1 article published in JoVE Biology Assessment of The Effect of Antidiarrheal Drugs and Plant Extracts on Drosophila melanogaster Chengmei Liu1, François Chassagne1 1UMR 152 PharmaDev, Université Paul Sabatier, Institut de Recherche pour le Développement Here, a method is described to feed Drosophila melanogaster with drugs and plant extracts and assess their effect on the gastrointestinal tract by analyzing the fruit flies fecal deposits. The drug-treated flies can be used as a model for further research.