Melissa recently had surgery and was subsequently prescribed an opiate pain medication, Oxycodone, to alleviate her pain during recovery. Melissa unfortunately became addicted to the drug and eventually sought help at an in-patient drug-rehab program. When talking to a therapist, Melissa states that she mainly continues to use Oxycodone so that she won't feel miserable due to withdrawal (a common reason for many opiate addicts).
Which theory of addiction best explains Melissa's Oxycodone addiction?
Psychodynamic Theory of Addiction
Positive-Incentive Theory
Physical-Dependence Theory
Disease Model of Addiction