I have found the statistic where I have read that more than 30% of people don't notice their drug addiction. My friend is a big lover of light drugs and her parents worry about it. She doesn't notice her addiction. They organize a consultation with the doctor and he said that my friend is in the first stage of drug addiction. She isn't still full addicted but can. Now she is undergoing a rehabilitation course - www.abbeycarefoundation.com/rehab/birmingham/. It shows me that this problem is real and everyone can be addicted even without noticing it. So now I am careful with drugs and alcohol because I want to stay healthy