How can a person tell if he or she is addicted to a drug?

Sings of addiction are: craving the drug mentally and physically, becoming sick without the drug (withdrawal), obsessing about the drug, doing whatever it takes to obtain the drug. It is very easy to become addicted to just about any drug that makes you feel good. Your brain remembers that feelings and eventually needs it to feel "normal". Drug addiction can be very painful, very expensive, and fatal. http://www.drug-addiction.com