Sedation and anesthesia are generally decreasing or eliminating pain by administering substances to the patient during a procedure. Sedation allows patients to reduce their level of consciousness, that is, reduce the excitation of the central nervous system, to reassure and change your perception of pain. The state of consciousness varies according to the type of sedation, deep or shallow. So you can make patients drowsy but responds to commands or does not react to any stimulus. General anesthesia, like deep sedation is a reversible and temporary state of unconsciousness, that is, the cessation of activity of the central nervous system with the consequent loss of pain throughout the body. In dentistry, general anesthesia is indicated for infants and young children, people with mental illness, in allergic patients to local anesthetics, and in very large operations. Drugs or drugs used as general anesthesia or sedation may be administered by the inhaled route, intravenous, intramuscular, oral or rectal. Both for sedation to general anesthesia, the medical team should make a preliminary study of the individual to ensure their safety and effectiveness for interventions.