Helping others

Helping someone to overcome addiction.

I would make sure that they’re checked into a rehabilitation centre which would help them recover. Many centers have the 12 step program which has helped many.
12 steps
Step One: Admit powerlessness over drugs.
Step Two: Come to believe that a power greater than ourselves can restore us to sanity.
Step Three: Make a decision to turn our will.
Step Four: Make a moral inventory of ourselves.
Step Five: Admit to ourselves and to someone else the exact nature of our wrongs.
Step Six: We’re entirely ready to remove all these defects of character.
Step Seven: Humbly ask him to remove our shortcomings.
Step Eight: Make amends to everyone
Step Nine: Made direct amends to people wherever possible, except when to do so would injure them or others.
Step Ten: Continued to take personal inventory.
Step Eleven: Sought to improve conscious contact with ourselves.
Step Twelve: Have an awakening as the result of these steps and tried to carry this message to addicts.
http://addictionrecoverybasics.com/2007/01/30/the-12-steps/
http://www.12step.org/
http://www.drugalcohol-rehab.com/addiction-recovery.htm

How do you help a drug abuser who does not want to quit or even acknowledge that there is a problem?

You can take measures to assist them into appropriate treatment with an intervention. An intervention brings the family and concerned individuals together to help bring the 'moment of truth' up to meet the addict and ensure that they receive treatment earlier rather than later or never at all. The addict had to be pushed by many loved ones until they themselves admit to having a problem, or else it’s impossible for treatment to take place. In a successful intervention, the addict will be in appropriate Professional Treatment that day or the next.