PARASYMPATHOMIMETIC DRUGS Meaning and
Definition
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Parasympathomimetic drugs, also known as cholinomimetics or parasympathetic agonists, are a class of medications that mimic or enhance the effects of the parasympathetic nervous system. The parasympathetic nervous system is responsible for regulating various bodily functions such as digestion, relaxation, and maintenance of normal bodily functions during rest and recovery.
Parasympathomimetic drugs act by binding to and activating specific receptors, called cholinergic receptors, which are found throughout the body. These drugs typically mimic the action of acetylcholine, a neurotransmitter that is released by parasympathetic nerve endings to elicit a response in target tissues.
The activation of cholinergic receptors by parasympathomimetic drugs leads to various effects, depending on the specific receptor subtype and the organ or tissue involved. These effects can include decreased heart rate, increased salivation and secretion of digestive enzymes, constriction of the smooth muscles in the bronchi and gastrointestinal tract, and pupillary constriction.
Parasympathomimetic drugs are used therapeutically to treat a variety of conditions. For example, they can be used to increase gastric motility and relieve constipation, slow heart rate in certain cardiac conditions, constrict the pupil during eye examinations, and stimulate saliva production in individuals with dry mouth. Additionally, these drugs are sometimes used to counteract the effects of certain anticholinergic medications or poisoning by agents that block cholinergic receptors.
It is worth noting that parasympathomimetic drugs can have numerous side effects, including excessive salivation, sweating, diarrhea, bronchospasm, and bradycardia. Therefore, their use requires careful consideration and proper medical supervision.
Common Misspellings for PARASYMPATHOMIMETIC DRUGS
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Etymology of PARASYMPATHOMIMETIC DRUGS
The word "parasympathomimetic" originates from the combination of three components: "para-" meaning alongside, "sympatho-" referring to the sympathetic nervous system, and "mimetic" meaning to imitate or mimic.
The term "parasympathomimetic" describes drugs that imitate or mimic the effects of the parasympathetic nervous system, which is responsible for the "rest and digest" bodily functions. These drugs enhance the activity of the parasympathetic nervous system by activating or stimulating its receptors.
