Alcohol and drug abuse treatments will be different for every person. With so many varying factors, there is no one size fits all to help people suffering from drug addiction or abuse. If you believe that someone you love is abusing drugs, there are many different ways you can try to help them. Unfortunately, you can only help someone who is willing to be helped. Pushing too hard will only alienate them. This is not to say you should not be forceful if your loved on is putting their life, home, family or career in danger.
The first step is to talk to them. Perhaps they do not realize that anyone one else has noticed, or have simply ignored the negative impact their drug use is having on their life. Beginning the conversation might reveal that they have been struggling with their addiction silently and did not know where to turn for help. Try not to have any expectations from your first conversation, you will likely find your self disappointed. After expressing your concerns, give them some time unless your loved one asks you to help them right away. Most people with drugs problems will deny they have an issue and forcing it (unless they are truly at risk of death or killing someone else through recklessness) will not help. Keep in mind this is about them, not about you or even how you feel about drug use. Express that you love them and want to help.
The first treatment step for the average person would be counseling. Most state or city governments provide drug counseling for free or at little cost. If this is not the case in your city, look into religious and charity groups. If counseling alone does not work, rehab is the next step. Rehab will either involve out patient counseling and accountability to stay clean, or in patient rehab where patients live and are treated away from negative influences.