Overdose 594 chapter 23 medicines and drugs hepatitis

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overdose 594 Chapter 23 Medicines and Drugs hepatitis B and HIV For more information on hepatitis B and HIV, see Chapters 24 and 25, pages 638 and 662. A strong, supportive system of family and friends can help a teen make the healthful decision to avoid drugs. What other factors help you remain drug free?
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D RUG U SE AND THE B RAIN Ecstasy, a stimulant drug that speeds up the nervous system, affects parts of the brain controlling thinking, mood, memory, and perception. 595 Lesson 2 Drug Use—A High-Risk Behavior addiction For more infor- mation on addiction, see Chapter 22, page 578. Understanding the Addiction Cycle Teens who experiment with drugs will experience side effects, or unwanted reactions. The side effects can range from nausea and headaches to a loss of consciousness and even death, and can occur with a teen’s first use of a drug. What may begin as a seemingly harmless pastime can result in serious consequences, including: Tolerance. The body of the substance abuser needs more and more of the drug to get the same effect. Psychological dependence. A condition in which a person believes that a drug is needed in order to feel good or to function normally , develops over time. The user has a continuing desire to take the drug for its effect. Physiological dependence. A person who experiences the severe effects of withdrawal when he or she stops taking a drug has a a condition in which the user has a chemical need for the drug . Symptoms of withdrawal can include nervousness, insomnia, severe nausea, headaches, vomiting, chills, and cramps. In some cases, death can result. Addiction. Anyone who takes drugs risks one of the most frightening side effects: a physiological or psychologi- cal dependence on a drug . Addiction causes persistent, compulsive use of a substance known by the user to be harmful. People who are addicted to a substance have great difficulty in stopping without professional intervention. addiction physiological dependence psychological dependence neocortex hypothalamus basal ganglia amygdala hippocampus
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Other Consequences of Drug Use n addition to the physical risks to a person’s health, substance I abuse can damage a teen’s performance in school, and in sports, and his or her relationships with friends and family. The abuse of drugs adds pressure and stress to a period of life that is already filled with both. Consequences for the Individual Drug use affects all aspects of a person’s health. Mental and physi- cal health suffer as tolerance, dependence, and addiction develop. The effects of drug use also influence emotional health. People who experiment with drugs tend to lose control more readily than those who do not. This tendency can lead to violence. Substance abuse is also a major factor in violent crimes, suicides, and both unintentional and intentional deaths. Drug use can lead to a relaxing of inhibitions.
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