Treballs Finals de Grau d'Enginyeria Informàtica, Facultat de Matemàtiques, Universitat de Barcelona, Any: 2017, Director: Laura Igual Muñoz[en] This work is part of a project which consists on the development of the web “Guía de consenso para el uso de medicamentos en de insuficiencia renal”. The goal of this web is to let their users search for relevant information of a set of medicines. For each active principle, users can read their descriptions and usage recommendations depending on the glomerular filtration rate of the patient. These descriptions and recommendations were written by a team of practical pharmacy from Faculty of Pharmacy of Universitat de Barcelona. This information has to be able to be updated in any moment. The main goal of this project is to let the administrator manage a database of active principles. The web application allow the administrator to do the following database operations: to add, edit and delete an active principle and to add, edit and remove a recommendation to or from any active principle. This paper analyzes and designs the development of a CRUD which fulfills the database requirements of the web administrator. Also, it is explained the technology which has been used and the solution of each operation of the CRUD.