Anti-anxiety agents work by __.
Group of answer choices
altering levels of neurotransmitters
improving the ability to focus on tasks
blocking the neurotransmitter dopamine
depressing central nervous system activity
The Correct Answer and Explanation is :
The correct answer is “depressing central nervous system activity.”
Explanation:
Anti-anxiety agents, commonly referred to as anxiolytics, are medications primarily used to treat anxiety disorders by reducing symptoms of anxiety, restlessness, and nervousness. The most widely prescribed anti-anxiety agents include benzodiazepines (e.g., diazepam, lorazepam) and certain non-benzodiazepine medications (e.g., buspirone, selective serotonin reuptake inhibitors).
These medications work by depressing central nervous system (CNS) activity, which in turn helps to calm the body’s heightened response to stress or anxiety. This depressive effect on CNS activity generally results in a reduction of anxiety levels, relaxation of muscles, and sedation.
How Anti-Anxiety Agents Depress CNS Activity:
- Benzodiazepines: These drugs enhance the effects of gamma-aminobutyric acid (GABA), an inhibitory neurotransmitter in the brain. By binding to specific sites on GABA receptors, benzodiazepines increase GABA’s inhibitory effects, leading to a greater calming effect on the CNS. This reduction in neural excitability is a key mechanism for their anxiolytic (anxiety-reducing) and sedative properties.
- Buspirone: Unlike benzodiazepines, buspirone works on serotonin receptors. It acts as a partial agonist at serotonin (5-HT1A) receptors, which helps in reducing anxiety without the sedative effects of benzodiazepines. However, its precise mechanism is still not fully understood.
- Selective Serotonin Reuptake Inhibitors (SSRIs): While not typically considered a first-line treatment for acute anxiety, SSRIs (like fluoxetine or sertraline) can help in long-term management by altering serotonin levels. Over time, this can lead to improved mood regulation and reduced anxiety.
In all cases, the primary result is a decrease in CNS activity, which calms the overactive neuronal firing that contributes to anxiety symptoms.