Hello, i want to ask you not to judge me for what i will say below, the matter is i'm getting an immigrant visa, for me and my 14 year-old son. We will have to go through medical check up in a month, i have one serious question which bothers me so much lately. I'm from Kazakhstan, recently i got to know that my son used to take such light "drug" as nasvay i don't know if you know what is it, but it's like a tobacoo with some unknown chemicals, in this country it is not illegal, it doesn't consist of vicodine or morphine. but i worry much! please people i need your advice!