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monoamine reuptake inhibitor
A monoamine reuptake inhibitor (MRI) is a drug that acts as a reuptake inhibitor of one or more of the three major monoamine neurotransmitters serotonin, norepinephrine, and dopamine by blocking the action of one or more of the respective monoamine transporters (MATs), of which include the serotonin transporter (SERT), norepinephrine transporter (NET), and dopamine transporter (DAT). This in turn results in an increase in the synaptic concentrations of one or more of these neurotransmitters and therefore an increase in monoaminergic neurotransmission.
The majority of currently approved antidepressants act predominantly or exclusively as MRIs, including the selective serotonin reuptake inhibitors (SSRIs), serotonin-norepinephrine reuptake inhibitors (SNRIs), and almost all of the tricyclic antidepressants (TCAs). Many psychostimulants used either as anorectics or in the treatment of ADHD also behave as MRIs. Additionally, psychostimulants acting as MRIs that affect dopamine such as cocaine and methylphenidate are often abused as recreational drugs. As a result, many of them have become controlled substances, which in turn has resulted in the clandestine synthesis of a vast array of designer drugs for the purpose of bypassing drug laws, a prime example of such is the mixed monoamine reuptake inhibitor and releasing agent mephedrone.
==Types of MRIs==
There are a variety of different kinds of MRIs, of which include the following:
* Selective for one monoamine transporter
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* Serotonin reuptake inhibitor (SRI)
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* Norepinephrine reuptake inhibitor (NRI)
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* Dopamine reuptake inhibitor (DRI)
* Non-selective, binding to two or more monoamine transporters
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* Serotonin-norepinephrine reuptake inhibitor (SNRI)
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* Serotonin-dopamine reuptake inhibitor (SDRI)
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* Norepinephrine-dopamine reuptake inhibitor (NDRI)
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* Serotonin-norepinephrine-dopamine reuptake inhibitor (SNDRI)
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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