The best part about drug rehab centres is that they are very well structured and are able to exercise discipline. Drug rehab centres help quiet a few people on the road to a better life and sobriety. In simple word Drug rehabilitation is a small expression for the practice of medical or psychotherapeutic treatment, for addiction towards psychoactive material like alcohol and other street drugs.
Drug rehabilitation centres generally tend to deal with both the aspects of drug dependency, physical as well as psychological. Physical dependency engages in a detoxification method to handle withdrawal symptoms from habitual consumption of drugs. Psychological dependency is addressed in quiet a few rehab centres by trying to teach the patient new ways of interacting in a drug-free surrounding.
The best thing to do is to leave the task to the professionals. Send the addict to a rehab center and support him/her emotionally as a friend or family so as they don't dwell back doing drugs.
There are many rehab centers, which are doing it for non-profit, e.g., www.alldrugrehabcenters.com/ is a non-profit rehab center website. It will locate the nearest rehab center for you for your convenience. The rest is up to the addict and the professionals.