National Institute of Neurology and Neurosurgery, Mexico

The National Institute of Neurology and Neurosurgery (INNN; Instituto Nacional de Neurología y Neurocirugía Manuel Velasco Suárez) is a Mexican federal specialist hospital and research institute in Mexico City dedicated to the diagnosis, treatment, and study of neurological and neurosurgical conditions. The INNN has been a centre for ketamine research in treatment-resistant depression, conducting trials evaluating intravenous ketamine dosing regimens for patients unresponsive to standard antidepressant therapy.