When administered to persons seeking to beat addiction to heroin, methadone, cocaine or alcohol, a single dose of ibogaine typically achieves the following: Firstly, complete removal or severe attenuation of the symptoms of withdrawal, allowing painless detoxification, (occurs with approx. 90% of subjects). Secondly, removal of the desire to use drugs for a period of between one week and three months, (occurs with approx. 60% of subjects). And, thirdly, the experiencing of pyschological insights into the roots of drug-using behaviour that, combined with suitable therapy, can lead to long-term drug abstinence, (occurs with approx. 30% of subjects).