The question, What is fibromyalgia? is a complicated one that doctors and patients have been trying for decades to answer. Fibromyalgia is a chronic condition that causes intense pain all over the body, as well as a host of other symptoms. It affects more than 6 million people in the United States. Doctors classify fibromyalgia as a syndrome, which means it has a group of signs, symptoms and characteristics that occur together.
Medical Definition of Agonist. Agonist: A substance that acts like another substance and therefore stimulates an action. Agonist is the opposite of antagonist. Antagonists and agonists are key players in the chemistry of the human body and in pharmacology. Last Editorial Review: 5/13/2016.
An adrenergic alpha-agonist (or alpha-adrenergic agonists) are a class sympathomimetic agents that selectively stimulates alpha adrenergic receptors. The alpha-adrenergic receptor has two subclasses Î± 1 and Î± 2. Alpha 2 receptors are associated with sympatholytic properties.Î± Adrenergic agonists have the opposite function of alpha blockers.Alpha adrenoreceptor ligands mimic the action of epinephrine and norepinephrine signaling in the heart, smooth muscle and central nervous system, with norepinephrine being the highest affinity. Adrenergic agonists have the opposite function of alpha blockers. Alpha adrenoreceptor ligands mimic the action of epinephrine and norepinephrine signaling in the heart, smooth muscle and central nervous system, with norepinephrine being the highest affinity.