On the psychotropic effects of carbon dioxide. 2012

Alessandro Colasanti, and Gabriel Esquivel, and Koen J Schruers, and Eric J Griez
Neuropsychopharmacology Unit, Centre for Pharmacology and Therapeutics, Division of Experimental Medicine, Department of Medicine, Imperial College, 2nd floor Burlington Danes Building, Clinical Imaging Center, Hammersmith Hospital, 160 Du Cane Road, W120NN London, UK. a.colasanti@imperial.ac.uk

It has been well established that the inhalation of Carbon Dioxide (CO2) can induce in humans an emotion closely replicating spontaneous panic attacks, as defined by current psychiatry nosology. The purpose of this review is to provide a critical summary of the data regarding CO2's psychopharmacological properties and underlying mechanisms. The authors review the literature on the human and animal response for the exposure of exogenous CO2 focusing on five points of interest: 1) the early history of the use of CO2 as an anesthetic and therapeutic agent, 2) the subjective effects of breathing CO2 at different concentrations in humans, 3) the use of CO2 in experimental psychiatric research as an experimental model of panic, 4) the pharmacological modulation of CO2-induced responses, and 5) the putative neurobiological mechanisms underlying the affective state induced by CO2. The authors conclude with an evolutionary-inspired notion that CO2 might act as an agent of a primal emotion serving a homeostatic function, in the control of respiration and acid-base balance.

UI MeSH Term Description Entries
D011619 Psychotropic Drugs A loosely defined grouping of drugs that have effects on psychological function. Here the psychotropic agents include the antidepressive agents, hallucinogens, and tranquilizing agents (including the antipsychotics and anti-anxiety agents). Psychoactive Agent,Psychoactive Agents,Psychoactive Drug,Psychopharmaceutical,Psychopharmaceuticals,Psychotropic Drug,Psychoactive Drugs,Agent, Psychoactive,Agents, Psychoactive,Drug, Psychoactive,Drug, Psychotropic,Drugs, Psychoactive,Drugs, Psychotropic
D012143 Respiratory Physiological Phenomena Physiological processes and properties of the RESPIRATORY SYSTEM as a whole or of any of its parts. Respiratory Physiologic Processes,Respiratory Physiological Processes,Respiratory Physiology,Physiology, Respiratory,Pulmonary Physiological Phenomena,Pulmonary Physiological Phenomenon,Pulmonary Physiological Process,Pulmonary Physiological Processes,Respiratory Physiological Concepts,Respiratory Physiological Phenomenon,Respiratory Physiological Process,Concept, Respiratory Physiological,Concepts, Respiratory Physiological,Phenomena, Pulmonary Physiological,Phenomena, Respiratory Physiological,Phenomenas, Pulmonary Physiological,Phenomenas, Respiratory Physiological,Phenomenon, Pulmonary Physiological,Phenomenon, Respiratory Physiological,Phenomenons, Pulmonary Physiological,Phenomenons, Respiratory Physiological,Physiologic Processes, Respiratory,Physiological Concept, Respiratory,Physiological Concepts, Respiratory,Physiological Phenomena, Pulmonary,Physiological Phenomena, Respiratory,Physiological Phenomenas, Pulmonary,Physiological Phenomenas, Respiratory,Physiological Phenomenon, Pulmonary,Physiological Phenomenon, Respiratory,Physiological Phenomenons, Pulmonary,Physiological Phenomenons, Respiratory,Physiological Process, Pulmonary,Physiological Process, Respiratory,Physiological Processes, Pulmonary,Physiological Processes, Respiratory,Process, Pulmonary Physiological,Process, Respiratory Physiological,Processes, Pulmonary Physiological,Pulmonary Physiological Phenomenas,Pulmonary Physiological Phenomenons,Respiratory Physiological Concept,Respiratory Physiological Phenomenas,Respiratory Physiological Phenomenons
D002245 Carbon Dioxide A colorless, odorless gas that can be formed by the body and is necessary for the respiration cycle of plants and animals. Carbonic Anhydride,Anhydride, Carbonic,Dioxide, Carbon
D004305 Dose-Response Relationship, Drug The relationship between the dose of an administered drug and the response of the organism to the drug. Dose Response Relationship, Drug,Dose-Response Relationships, Drug,Drug Dose-Response Relationship,Drug Dose-Response Relationships,Relationship, Drug Dose-Response,Relationships, Drug Dose-Response
D004644 Emotions Those affective states which can be experienced and have arousing and motivational properties. Feelings,Regret,Emotion,Feeling,Regrets
D006706 Homeostasis The processes whereby the internal environment of an organism tends to remain balanced and stable. Autoregulation
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000136 Acid-Base Equilibrium The balance between acids and bases in the BODY FLUIDS. The pH (HYDROGEN-ION CONCENTRATION) of the arterial BLOOD provides an index for the total body acid-base balance. Anion Gap,Acid-Base Balance,Acid Base Balance,Acid Base Equilibrium,Anion Gaps,Balance, Acid-Base,Equilibrium, Acid-Base,Gap, Anion,Gaps, Anion
D000280 Administration, Inhalation The administration of drugs by the respiratory route. It includes insufflation into the respiratory tract. Drug Administration, Inhalation,Drug Administration, Respiratory,Drug Aerosol Therapy,Inhalation Drug Administration,Inhalation of Drugs,Respiratory Drug Administration,Aerosol Drug Therapy,Aerosol Therapy, Drug,Drug Therapy, Aerosol,Inhalation Administration,Administration, Inhalation Drug,Administration, Respiratory Drug,Therapy, Aerosol Drug,Therapy, Drug Aerosol
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia

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