Iboga is a shrub. It is used for ritual and ceremonial purposes in some African cultures. The root bark of the plant is also used as medicine. Ibogaine is a chemical in iboga which is illegal in the United States. People take iboga for fever, influenza (the flu), swine flu, high blood pressure, drug abuse, HIV/AIDS, and nerve disorders. They also take it for preventing fatigue and drowsiness, for increasing sex drive, for fighting substance abuse and addictions, and as a general tonic.
Tabernanthe iboga reduces or even avoids the withdrawal symptoms of a heroin withdrawal. One dose of ibogain can abruptly eliminate the demand for heroin. A study from 2013 reports that an heroin addict had no demand for heroin for half a year after just one dose of ibogain. It is reported that heroin addicts get a clear inside of their lives and are able to answer the question why they started taking drugs and what this did to them. That prevents them from taking drugs again. How Ibogain works exactly in the brain is not known until today. Researchers suggest that ibogaine blocks NMDA receptors in the brain. There is ongoing research in that field.