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. They are located throughout the body, causing various physiological reactions including bronchodilation, accelerated heartbeat, and vasoconstriction. They work by inhibiting the synthesis, release, or reuptake of the neurotransmitters or by antagonising the receptors on postsynaptic neurones. Their medical uses, mechanisms of action, adverse effects, and contraindications depend on the specific types of adrenergic blockers used, including alpha 1, alpha 2, beta 1, and beta 2.
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Adrenergic neurone blockers, commonly known as adrenergic antagonists, are a group of drugs that inhibit the sympathetic nervous system by blocking the...
are primarily postsynaptic adrenergic receptor antagonists (alpha and beta adrenergic receptor antagonists, or "blockers"), inhibiting the downstream...
Alpha-blockers, also known as α-blockers or α-adrenoreceptor antagonists, are a class of pharmacological agents that act as antagonists on α-adrenergic receptors...
The adrenergic receptors or adrenoceptors are a class of G protein-coupled receptors that are targets of many catecholamines like norepinephrine (noradrenaline)...
acetyl coenzyme A. Adrenergicneurons – noradrenaline. Noradrenaline (norepinephrine) is released from most postganglionic neurons in the sympathetic...
on postganglionic neurons. In response to this stimulus, the postganglionic neurons release norepinephrine, which activates adrenergic receptors that are...
An adrenergic nerve fibre is a neuron for which the neurotransmitter is either adrenaline (epinephrine), noradrenaline or dopamine. These neurotransmitters...
molecule secreted by a neuron to affect another cell across a synapse. The cell receiving the signal, or target cell, may be another neuron, but could also be...
is released from the presynaptic neuron. Acetylcholine can either bind to the receptors on the postsynaptic neuron to continue transmission of nerve...
neuron produces GABA. A substance is GABAergic if it produces its effects via interactions with the GABA system, such as by stimulating or blocking neurotransmission...
A norepinephrine releasing agent (NRA), also known as an adrenergic releasing agent, is a catecholaminergic type of drug that induces the release of norepinephrine...
physiological process by which a given neuron uses one or more chemicals to regulate diverse populations of neurons. Neuromodulators typically bind to metabotropic...
which neurons' signals can be sent to each other and to non-neuronal cells such as those in muscles or glands. Chemical synapses allow neurons to form...
reversing transporters in the synapses. Beta blockers, which counter some of the effects of noradrenaline by blocking their receptors, are frequently used to...
familial tremor (essential tremor) (BFT) is responsive to peripheral β adrenergicblockers, and β2-stimulation is known to cause tremor. Patients with BFT were...
of adrenal medullary chromaffin cells, as well as in pre-synaptic adrenergicneuron granules. The process in which this occurs is closely related to the...
refer to two major therapeutic groups: neuromuscular blockers and spasmolytics. Neuromuscular blockers act by interfering with transmission at the neuromuscular...
Clonidine, sold under the brand name Catapres among others, is an α2A-adrenergic agonist medication used to treat high blood pressure, ADHD, drug withdrawal...
Marrero Rodríguez, Francisco (2009-04-01). "Reflections on beta-adrenergic receptor blockers and cocaine use. A case in point". Revista Española de Cardiología...
synapse is a structure that permits a neuron (or nerve cell) to pass an electrical or chemical signal to another neuron or to the target effector cell. Synapses...
brain, and many addictive drugs increase dopamine release or block its reuptake into neurons following release. Other brain dopamine pathways are involved...
characteristics. However, phasic blocks occur as repeated depolarization increases blockers’ affinity for channels in the neuron. The combination of an increase...
dopamine release through indirect actions (for example, on neurons that synapse onto neurons that release dopamine or express dopamine receptors) can also...
has been proposed as a consequence of AD rather than a direct cause. Adrenergic Anticholinergic Dopaminergic GABAergic Glutamatergic moly (herb) Nootropic...