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Older and less selective antidepressants like TCAs and MAOIs inhibit the reuptake or metabolism of norepinephrine and serotonin in the brain, which results in higher concentrations of neurotransmitters. [25] Antidepressants that have dual mechanisms of action inhibit the reuptake of both serotonin and norepinephrine and, in some cases, inhibit ...
Key symptoms include excessive anxiety about multiple events and issues, and difficulty controlling worrisome thoughts, that persists for at least 6 months. Antidepressants provide a modest-to-moderate reduction in anxiety in GAD, [25] and are superior to placebo in treating GAD. The efficacy of different antidepressants is similar.
In some patients with depression, DA-related disturbances improve upon treatment with antidepressants, it is presumed by acting on serotonergic or noradrenergic circuits, which then affect DA function. However, most antidepressant treatments do not directly enhance DA neurotransmission, which may contribute to residual symptoms, including ...
The pharmacology of antidepressants is not entirely clear.. The earliest and probably most widely accepted scientific theory of antidepressant action is the monoamine hypothesis (which can be traced back to the 1950s), which states that depression is due to an imbalance (most often a deficiency) of the monoamine neurotransmitters (namely serotonin, norepinephrine and dopamine). [1]
Certain antidepressants are prescribed to treat anxiety because they target the neurotransmitters responsible for the feelings and symptoms that characterize anxiety disorders.
Escitalopram, a selective serotonin reuptake inhibitor (SSRI) used as an antidepressant.. Reuptake inhibitors (RIs) are a type of reuptake modulators.It is a drug that inhibits the plasmalemmal transporter-mediated reuptake of a neurotransmitter from the synapse into the pre-synaptic neuron.