Addictive dosing behaviors, the large doses associated to Spike the blood plasma level, vs
the lower low dosing and more often which is the KEY factor to the physical changes the brain makes which cause dependency.
Dependency is the actual physical changes to your body which cause withdrawal. Addiction is the BEHAVIOR of taking the drugs to get high, not as prescribed, and when not needed for clinical reasons. It is the un-manageable behaviors associated with lack of control.