It is estimated that 0.5% of the population is a problem drug-user worldwide and only one fifth of them receives care. Do they get the help they need when they want to leave the drug addiction? With the review of relevant literature, we aim to collect those factors that can help or prevent addicts to reach a successful rehabilitation. The litterateur shows that when a drug addict doesn't want help to leave the addiction she or he can't be forced. The social network and caregivers play an important part in the rehabilitation process. If patients accept the help, caregivers and the patients' social network can be those who may help them to a better life-quality.