In the present day we consume a lot of medicines due to the myriad number of diseases. However, we do not take care of the excessive reliance of the medicine. Some medicines cause a habit and are classified as habit forming substances. For example many pain killers and anti-depressants can cause a habit. This is the beginning of the drug addiction. Even if not the medicines, many people also use and form habits that are injurious to their health. If you know anyone who has such a problem, then it is important that you guide them to the best drug rehabilitation centre in Chennai.