With narcotic medication, there is always the possibility of developing a dependency. Whether you get addicted to the drug depends on certain factors, including genetics, the type of drug, and how long you take it. If you are concerned about developing a dependency for a drug you have or will be prescribed, talk to your doctor. 

You can still become addicted to drugs, even if you only use every once in a while. This is because drugs literally change the chemistry of your brain, causing it to want more and more of the drug until you become a habitual user. No one sets out to become a drug addict—it's a slippery slope that starts with the first try. 

Every person and every body is different. It's possible to suffer serious health consequences after one drug use because most people don't take into account weight, tolerance, medications, and other factors that affect how your body responds to a drug. In addition to the enormous potential for overdose, even one use of drugs can change the chemistry of your brain—a potential first step in the path to addiction.