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Since the late 1980s, SSRIs have dominated the antidepressant drug market. Today, there is increased interest in antidepressant drugs with broader mechanisms of action that may offer improvements in efficacy and tolerability. In 1993, a new drug was introduced to the US market called venlafaxine, a serotonin–norepinephrine reuptake inhibitor ...
Norepinephrine Epinephrine. A norepinephrine reuptake inhibitor (NRI, NERI) or noradrenaline reuptake inhibitor or adrenergic reuptake inhibitor (ARI), is a type of drug that acts as a reuptake inhibitor for the neurotransmitters norepinephrine (noradrenaline) and epinephrine (adrenaline) by blocking the action of the norepinephrine transporter (NET).
These drugs inhibit the uptake of the neurotransmitter 5-HT by blocking the SERT, thus increasing its synaptic concentration, and have shown to be efficacious in the treatment of depression, however sexual dysfunction and weight gain are two very common side-effects that result in discontinuation of treatment.
Adrenergic blocking agents are a class of drugs that exhibit its pharmacological action through inhibiting the action of the sympathetic nervous system [1] in the body. The sympathetic nervous system(SNS) is an autonomic nervous system that we cannot control by will.
NRI drugs bind to the NET and inhibit the reuptake of NE. These drugs therefore increase the availability of NE for binding to postsynaptic receptors that regulate adrenergic neurotransmission. [16] Selective NRIs blocks only the monoamine transporter NET, excluding the other two monoamine transporters (DAT and SERT) for dopamine and serotonin.
Adrenergic neurone blockers, commonly known as adrenergic antagonists, are a group of drugs that inhibit the sympathetic nervous system by blocking the activity of adrenergic neurones. They prevent the action or release of catecholamines such as norepinephrine and epinephrine.