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A sympatholytic (sympathoplegic) drug is a medication that opposes the downstream effects of postganglionic nerve firing in effector organs innervated by the sympathetic nervous system (SNS). [1] They are indicated for various functions; for example, they may be used as antihypertensives .
Sympatholytic drugs produce an opposing effect to sympathomimetic drugs. They reduce or inhibit sympathetic nervous system action. The mode of action of sympatholytic drugs includes the direct mode of blocking the activation of adrenoreceptors by receptor antagonist (blocker), and the indirect mode of inhibiting noradrenaline synthesis, storage ...
Examples of sympathomimetic effects include increases in heart rate, force of cardiac contraction, and blood pressure. [1] The primary endogenous agonists of the sympathetic nervous system are the catecholamines (i.e., epinephrine [adrenaline], norepinephrine [noradrenaline], and dopamine ), which function as both neurotransmitters and hormones .
There are no known contraindication to the use of dexmedetomidine. It has a biphasic effect on blood pressure with lower readings at lower drug concentrations and higher readings at higher concentrations. [32] Common side effects include: hypotension, hypertension, with slight decreases in heart rate, arrhythmias, and hypoxia.
Additional hypotensive effects may occur when patients are taking beta-1 blockers with other antihypertensive drugs such as nitrates, PDE inhibitors, ACE inhibitors and calcium channel blockers. [17] The combination of beta blockers and antihypertensive drugs will work on different mechanism to lower blood pressure. [17]
Antidepressants are a class of medications used very commonly to treat depression. In fact, nearly 13 percent of people 12 and over in the U.S. used antidepressants in 2017, according to the ...
Trimetaphan camsilate or trimethaphan camsylate (), trade name Arfonad, is a sympatholytic drug used in rare circumstances to lower blood pressure.. Trimetaphan is a ganglionic blocker: it counteracts cholinergic transmission at a specific type of nicotinic acetylcholine receptors in the autonomic ganglia and therefore blocks both the sympathetic nervous system and the parasympathetic nervous ...
According to the Anxiety and Depression Association of America (ADAA), 6.8 million adults have GAD. Other anxiety disorders include obsessive-compulsive disorder, panic disorder, post-traumatic ...
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