Anxiolysis includes the administration of pharmocological agents (benzodiazepines) that will relax the patient. These drugs (sometimes called tranquilizers) relax the patient in such a manner that he or she may fall asleep during treatment. A pulse oximeter is used to measure the patients heart rate and oxygen saturation during sedation. A reversal agent can be used to reverse the effects of these medications. This treatment is performed within the dental office.