Dr. Lopez graduated from University of San Carlos of Guatemala in 1990. Then he made his post graduate studies in internal medicine at The General Hospital San Juan de Dios. There he also studied Neurophysiology. He then studied Neurobiology at CIREN in La Habana, Cuba. He also has a specialization in therapeutic narrative from University Rafael Landivar. He returned to the University of San Carlos to receive a specialization in Addictology and to teach Neuro-Anatomy and Psychopharmacology in the psychology department
He is a member of Guatemalan Society of Biological Psychiatry. He has developed his own studies of P.A.W. Post Acute Withdrawal Syndrome, and has had success treating patients with the P.A.W. protocol that he developed. He is currently perusing new studies to understand the neurobiological process related to chemical and affective behavioral addictions, PTSD, and other psychitric conditions.