Final answer:
Psychological dependence refers to the emotional need for a drug, while physical dependence is the body's adaptation to the drug, causing withdrawal symptoms upon cessation. Tolerance, which can lead to increased drug use and overdose, is associated with physical dependence. Treatments for addiction may address both types of dependence.
Step-by-step explanation:
The difference between psychological and physical dependence is crucial in understanding addiction and the withdrawal process. Physical dependence involves the body adapting to a drug, leading to withdrawal symptoms when the drug use is stopped. This may involve tremors, pain, and seizures. Psychological dependence, on the other hand, deals with the emotional need for a drug, often used to relieve psychological distress such as anxiety or depression. Tolerance is a concept closely tied to physical dependence, where more of the drug is needed to achieve the same effects, which can lead to overdose and death.
Withdrawal symptoms for each type of dependence differ. Physical withdrawal might include flu-like symptoms, while psychological withdrawal includes craving and emotional distress. Situations like overcoming alcohol or barbiturate addiction can be life-threatening and require medical supervision.
Furthermore, treatments for addiction can vary with a combination of behavioral therapy and medications to help treat both the physical and psychological symptoms associated with withdrawal.