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sympatholytic
A sympatholytic (or sympathoplegic) drug is a medication which inhibits the postganglionic functioning of the sympathetic nervous system (SNS).〔(【引用サイトリンク】title=Dorlands Medical Dictionary:sympatholytic )〕 They are indicated for various functions, for example they may be used as antihypertensives. They are also used to treat anxiety, such as Generalized Anxiety Disorder, Panic Disorder and PTSD.
==Antiadrenergic==
Antiadrenergic agents inhibit the signals of epinephrine and norepinephrine. They are primarily adrenergic antagonists, (Alpha Blockers and Beta Blockers) inhibiting adrenergic receptors, but, there are exceptions: clonidine is an adrenergic agonist on the α2 receptor, since this receptor is located presynaptically to inhibit further release of adrenaline and noradrenaline.
Other ways of inhibiting adrenergic signaling is by catecholamine synthesis blocking, e.g. by methyltyrosine. Reserpine works by inhibiting transport into synaptic vesicles of noradrenaline by inhibiting the VMAT.
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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