Final answer:
Schedule I drugs have the highest potential for abuse with no accepted medical use, while Schedule II drugs also have a high abuse potential but with some medical uses. Examples of Schedule II drugs include fentanyl, morphine, and oxycodone. Prozac is a psychoactive drug, and psychoactive substances like benzodiazepines and barbiturates act on GABA receptors and have depressant effects.
Step-by-step explanation:
The scheduled drugs with the highest potential for abuse are those classified as Schedule I substances. Drugs in this category are considered to have a high potential for abuse and no accepted medical use in the United States. Examples of Schedule I drugs include heroin and other drugs without accepted medical uses. However, Schedule II drugs also have a high potential for abuse and can lead to severe psychological or physical dependence; they are considered slightly less dangerous than Schedule I drugs. Examples of Schedule II substances include fentanyl, morphine, oxycodone, and methadone. These are often prescription pain relievers with accepted medical uses but a high risk of addiction.
A. Is Prozac a psychoactive drug? Yes, Prozac is a psychoactive drug as it affects the mind, emotions, and behaviour by altering the chemical balance in the brain.
B. Three classes of psychoactive drugs that include opioids are analgesics (pain relievers), anaesthetics (used during surgical procedures to produce loss of sensation), and antitussives (cough suppressants).
C. False. Not all psychoactive drugs are illegal or available by prescription only. Some can be legally obtained over the counter or through other legal means.
D. True. Anxiolytics, which are medications used to treat anxiety, may indeed be prescribed by a physician.
E. Two drugs that activate receptors for the neurotransmitter GABA are benzodiazepines and barbiturates. These drugs have a depressant effect because GABA is an inhibitory neurotransmitter that can reduce neuronal excitability throughout the nervous system.