Ibogaine is not a substitute for narcotics or stimulants, is not addicting and is given in a single administration modality (SAM). It is a chemical dependence interrupter. Retreatment may occasionally be needed until the person being treated with Ibogaine is able to extinguish certain conditioned responses related to drugs they abuse. Early data suggests that a period of approximately two years of intermittent treatments may be required to attain the goal of long-term abstinence from narcotics and stimulants for many patients. The majority of patients treated with Ibogaine remain free from chemical dependence for a period of three to six months after a single dose. Approximately ten percent of patients treated with Ibogaine remain free of chemical dependence for two or more years from a single treatment and an equal percentage return to drug use within two weeks after treatment. Multiple administrations of Ibogaine over a period of time are generally more effective in extending periods of abstinence. It is noteworthy that twenty-nine of the thirty-five patients successfully treated with Ibogaine had numerous unsuccessful experiences with other treatment modalities