Substance abuse, which is also called addiction or using the substance more than needed, trying then to quit but having physical or psychological problems that were worsened by the drug, and having problems at work or with loved ones (Kring, et.al. 2007, 297). Tolerance is when a person needs higher doses of the drug to feel the effects or the lack of effect on the person when the drug is taken in its usual dosage (Kring, et.al. 2007). Withdrawal symptoms or negative physical and psychological effects occur when a person decides to lessen the intake of the drug or quit the drug altogether (Kring, et.al. 2007). Such symptoms include alcohol withdrawal delirium (Kring, et.al. 2007). Eating Disorders. Anorexia nervosa is an eating disorder that is most prevalent in young women (Halmi, 1983). This disorder usually begins in the adolescent stage when a girl's body begins to change (Halmi, 1983). Anorectics...

Anorectics go through phases of extreme fasting, binging, which is followed by purging via laxatives or self-induced vomiting (Pinel, 2006, 311). Moreover, though the term 'anorexia' means the loss of appetite, anorectics do not really lose their appetite or interest in food (Kring, et.al. 2007, 271). On the contrary, they are more likely to become obsessed with food and will prepare meals for their loved ones but will withhold from eating the food themselves (Pinel, 2006).
References

Blackburn, R. (2007). Personality disorder and psychopathy: Conceptual and empirical integration. Psychology, Crime & Law, 13(1), 7-18. http://search.ebscohost.com, doi:10.1080/10683160600869585

Halmi, K. (1983). CLASSIFICATION of EATING DISORDERS. International Journal