How do you help drug abuser?

First, I will try to persuade them by telling them some tragedies that drug brings. However, in my opinion, I think they won't admit the fact that they are addicted and the situation that they are in. Therefore, I would remove all the drugs and make them to admit the fact that they are actually addicted to drug. Then, I will send them for rehab or arrange an appointment with counselor. However, I think the most important think for drug abuser is their will to stop abusing drugs. Thus, I will try my best to change their mind by talking about their family and cheering them up.