I am linking a variety of website below that will give information on how to properly deal with an addicted family member.  Each website lists steps and instructions on how best to approach and deal with the issue.
http://health.howstuffworks.com/mental-health/10-ways-to-cope-with-addict-in-the-family.htm
http://www.wikihow.com/Deal-With-a-Drug-Addicted-Family-Member-or-Loved-One
http://www.helpguide.org/mental/drug_substance_abuse_addiction_signs_effects_treatment.htm
http://www.huffingtonpost.com/mark-redmond/addiction-recovery_b_822021.html