Final answer:
Antidepressant agents that block both serotonin and norepinephrine reuptake are classified as SNRIs, which serve to increase the availability of these neurotransmitters in the brain to help improve depression symptoms.
Step-by-step explanation:
Antidepressant agents that inhibit the reuptake of both serotonin and norepinephrine are classified as SNRIs (Serotonin-norepinephrine reuptake inhibitors). These medications work by preventing the reabsorption (reuptake) of the neurotransmitters serotonin and norepinephrine in the brain which helps to alleviate the symptoms of depression.
While SSRIs (Selective serotonin reuptake inhibitors) only block the reuptake of serotonin and TCAs (Tricyclic antidepressants) as well as MAOIs (Monoamine oxidase inhibitors) work through different mechanisms entirely, it is the SNRIs that specifically target both of these key neurotransmitters to improve mood and emotional stability.