Dear Colleagues: I am realizing a project of research about: Errors in Geriatrics (in relation to Polipharmacy, Iatrogenic, Interaction of Drugs etc.) If you have some information about it. Would you like to share with me? I will be very grateful. I will be waiting your kindly answer. Sincerely. Dr. Diana Rodriguez. C.E.U. Universidad Peruana Cayetano Heredia. Lima, Peru.