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Answer:
Which Drugs Are Abused?
The most commonly used prescription drugs fall into three classes:
1. Opioids
Examples: oxycodone (OxyContin), hydrocodone (Vicodin), and meperidine (Demerol)
Medical uses: Opioids are used to treat pain or relieve coughs or diarrhea.
How they work: Opioids attach to opioid receptors in the central nervous system (the brain and the spinal cord), preventing the brain from receiving pain messages.
2. Central Nervous System (CNS) Depressants
Examples: phenobarbital (Luminal), diazepam (Valium), and alprazolam (Xanax)
Medical uses: CNS depressants are used to treat anxiety, tension, panic attacks, and sleep disorders.
How they work: CNS depressants slow down brain activity by increasing the activity of a neurotransmitter called GABA. The result is a drowsy or calming effect.
3. Stimulants
Examples: methylphenidate (Ritalin) and amphetamine/dextroamphetamine (Adderall)
Medical uses: Stimulants can be used to treat narcolepsy and ADHD.
How they work: Stimulants increase brain activity, resulting in greater alertness, attention, and energy.
Explanation:
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