Final answer:
Prozac is a psychoactive drug that affects brain chemistry related to mood and emotion. Psychoactive drugs classes that include opioids are prescribed for pain, available by prescription for other conditions, or may be used illicitly. Anxiolytics prescribed to treat anxiety work by activating GABA receptors, leading to their depressant effects.
Step-by-step explanation:
Prozac is indeed a psychoactive drug as it affects the brain by regulating the levels of serotonin, a neurotransmitter, which can alter mood, emotion, and sleep. There are several classes of psychoactive drugs that include opioids; three of them are opioids as pain relievers (like morphine and fentanyl), prescription opioids (like oxycodone and hydrocodone), and illicit opioids (such as heroin). While not all psychoactive drugs are illegal or only available by prescription (alcohol and nicotine are legal substances, for example), many are regulated due to their potential for abuse and health risks. Anxiolytics, which are medications used to treat anxiety, can be prescribed by physicians as they often work by activating receptors for the neurotransmitter GABA, such as benzodiazepines and barbiturates. These drugs generally have a depressant effect because GABA is an inhibitory neurotransmitter that slows down brain activity.