Medications Affecting the Autonomic Nervous System .


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Drugs Affecting the Autonomic Nervous System. Cholinergic Agents and Cholinergic Blocking Agents. Cholinergic Agents. Drugs that stimulate the parasympathetic nervous system (PSNS) The PSNS is the opposing system to the SNS. Cholinergic Agents. Also known as cholinergic agonists or
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Drugs Affecting the Autonomic Nervous System Cholinergic Agents and Cholinergic Blocking Agents

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Cholinergic Agents Drugs that invigorate the parasympathetic sensory system (PSNS) The PSNS is the contradicting framework to the SNS

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Cholinergic Agents Also known as cholinergic agonists or parasympathomimetics

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Instructors may wish to utilize EIC Image #56: The Parasympathetic and Sympathetic Nervous Systems and Their Relationships to One Another

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Cholinergic Agents Mimic the impacts of the PSNS neurotransmitter Acetylcholine (ACh)

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Cholinergic Receptors Two sorts, controlled by: Location Action once fortified Nicotinic receptors and Muscarinic receptors

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Nicotinic Receptors Located in the ganglia of both the PSNS and SNS Named "nicotinic" in light of the fact that can be animated by the alkaloid nicotine

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Muscarinic Receptors Located postsynaptically: Smooth muscle Cardiac muscle Glands of parasympathetic strands Effector organs of cholinergic thoughtful fibers Named "muscarinic" in light of the fact that can be empowered by the alkaloid muscarine

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Instructors may wish to embed EIC Image #57: The Sympathetic, Parasympathetic, and Somatic Nervous Systems This slide delineates area of the nicotinic and muscarinic receptors inside the PSNS.

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Lisa L. Hernandez: Is there duplicate missing toward the end? Restraining what? HHS: HHS: Adrenergic Agents: Mechanism of Action Direct-acting (agonist) Bind to cholinergic receptors, bringing about incitement

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Adrenergic Agents: Mechanism of Action Indirect-acting Inhibit the protein "cholinesterase" Result: more ACh is accessible at the receptors

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Indirect-Acting Cholinergic Agents (Cholinesterase Inhibitors) Reversible Bind to cholinesterase for a time of minutes to hours Irreversible Bind to cholinesterase and frame a perpetual covalent bond The body must make new cholinesterase

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Drug Effects of Cholinergic Agents Effects seen when the PSNS is fortified. The PSNS is the "rest and process" framework.

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Drug Effects of Cholinergic Agents "Slime" S alivation L acrimation U rinary incontinence D iarrhea G astrointestinal issues E mesis

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Drug Effects of Cholinergic Agents Stimulate digestive system and bladder Increased gastric emissions Increased gastrointestinal motility Increased urinary recurrence Stimulate understudy Constriction (miosis) Reduced intraocular weight Increased salivation and sweating

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Drug Effects of Cholinergic Agents Cardiovascular impacts Decreased heart rate Vasodilation Respiratory impacts Bronchial tightening, limited aviation routes

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Drug Effects of Cholinergic Agents At prescribed measurements, the cholinergics principally influence the MUSCARINIC receptors. At high measurements, cholinergics fortify the NICOTINIC receptors.

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Drug Effects of Cholinergic Agents DESIRED EFFECTS: from muscarinic receptor incitement Many undesirable impacts are because of incitement of the nicotinic receptors

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Cholinergic Agents: Therapeutic Uses Direct-Acting Agents Reduce intraocular weight Useful for glaucoma and intraocular surgery Examples: acetylcholine, carbachol, pilocarpine Topical application because of poor oral ingestion

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Cholinergic Agents: Therapeutic Uses Direct-Acting Agent—bethanechol Increases tone and motility of bladder and GI tract Relaxes sphincters in bladder and GI tract, permitting them to discharge Helpful for postsurgical atony of the bladder and GI tract Oral measurement or SC infusion

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Cholinergic Agents: Therapeutic Uses Indirect-Acting Agents Cause skeletal muscle constrictions Used for analysis and treatment of myasthenia gravis Used to invert neuromuscular blocking specialists Used to turn around anticholinergic harming (remedy) Examples: physostigmine, pyridostigmine

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Cholinergic Agents: Therapeutic Uses Indirect-Acting Agent—donepezil (Aricept) Used in the treatment of mellow to direct Alzheimer\'s illness. Increments or keep up memory and learning abilities.

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Cholinergic Agents: Side Effects Side impacts are a consequence of overstimulation of the PSNS. Cardiovascular: Bradycardia, hypotension, conduction anomalies (AV piece and heart failure) CNS: Headache, tipsiness, writhings Gastrointestinal: Abdominal spasms, expanded emissions, sickness, spewing

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Cholinergic Agents: Side Effects Side impacts are a consequence of overstimulation of the PSNS. Respiratory: Increased bronchial emissions, bronchospasms Other: Lacrimation, sweating, salivation, loss of binocular settlement, miosis

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Cholinergic Agents: Interactions Anticholinergics, antihistamines, sympathomimetics Antagonize cholinergic operators, bringing about diminished reactions

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Cholinergic Agents: Nursing Implications Keep as a primary concern that these specialists will empower the PSNS and copy the activity of ACh. Evaluate for sensitivities, nearness of GI or GU obstacles, asthma, peptic ulcer infection, or coronary conduit illness. Perform standard appraisal of VS and frameworks outline.

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Cholinergic Agents: Nursing Implications Medications ought to be taken as requested and not unexpectedly ceased. The measurements ought to be spread equitably separated to streamline the impacts of the solution. Overdosing can bring about existence debilitating issues. Patients ought not modify the doses unless coordinated by the doctor.

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Cholinergic Agents: Nursing Implications Encourage patients with myasthenia gravis to take prescription 30 minutes before eating to enhance biting and gulping. At the point when donepezil is recommended for Alzheimer\'s malady, be straightforward with parental figures and patients that the medication is for administration of side effects, not for a cure. Remedial impacts of donepezil may not happen for up to 6 weeks.

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Cholinergic Agents: Nursing Implications Atropine is the cure for cholinergics. It ought to be accessible in the patient\'s space for quick utilize if necessary. Patients ought to advise their doctor on the off chance that they encounter muscle shortcoming, stomach issues, loose bowels, or trouble relaxing.

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Cholinergic Agents: Nursing Implications Monitor for reactions, including: Increased respiratory Abdominal cramping emissions Bronchospasms Dysrhythmias Difficulty breathing Hypotension Nausea and vomiting Bradycardia Diarrhea Increased sweating Increase in recurrence and desperation of voiding examples

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Cholinergic Agents: Nursing Implications Monitor for restorative impacts: Alleviated signs and indications of myasthenia gravis In postoperative patients with diminished GI peristalsis, search for: Increased gut sounds Passage of flatus Occurrence of solid discharges In patients with urinary maintenance/hypotonic bladder, pee ought to happen inside a hour of bethanecol organization

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Cholinergic Blocking Agents Drugs that square or hinder the activities of acetylcholine (ACh) in the parasympathetic sensory system (PSNS)

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Cholinergic Blocking Agents: Mechanism of Action Competitive adversaries Compete with ACh Block ACh at the muscarinic receptors in the PSNS therefore, ACh can\'t tie to the receptor site and cause a cholinergic impact.

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Cholinergic Blocking Agents: Mechanism of Action Once these medications tie to receptors, they hinder nerve transmission at these receptors.

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Instructors may wish to utilize EIC Image #58: Site of Action of Cholinergic Blockers Within the PSNS

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Cholinergic Blocking Agents: Chemical Class Natural Synthetic/Semisynthetic atropine anisotropine clidinium belladonna dicyclomine glycopyrrolate hyoscyamine hexocyclium homatropine scopolamine ipratropium isopropamide oxybutynin propantheline tolterodine tridihexethyl

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Drug Effects of Cholinergic Blocking Agents Cardiovascular Small measurements: diminish heart rate Large dosages: increment heart rate CNS Small measurements: diminish muscle unbending nature and tremors Large measurements: laziness, bewilderment, mental trips

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Drug Effects of Cholinergic Blocking Agents Eye Dilated understudies (mydriasis) Decreased settlement because of loss of motion of ciliary muscles (cycloplegia) Gastrointestinal Relax smooth muscle tone of GI tract Decrease intestinal and gastric discharges Decrease motility and peristalsis

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Drug Effects of Cholinergic Blocking Agents Genitourinary Relaxed detrusor muscle Increased narrowing of inward sphincter Result: urinary maintenance Glandular Decreased bronchial emissions, salivation, sweating Respiratory Decreased bronchial emissions Dilated bronchial aviation routes

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Cholinergic Blocking Agents: Therapeutic Uses CNS Decreased muscle inflexibility and muscle tremors Parkinson\'s infection Drug-incited extrapyramidal responses

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Cholinergic Blocking Agents: Therapeutic Uses Cardiovascular Affect the heart\'s conduction framework Low dosages: moderate the heart rate High measurements: square inhibitory vagal impacts on the SA and AV hub pacemaker cells Result: expanded heart rate

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Cholinergic Blocking Agents: Therapeutic Uses Atropine Used fundamentally for cardiovascular issue Sinus hub brokenness Symptomatic second-degree heart piece Sinus bradycardia with hemodynamic bargain (propelled life bolster)

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Cholinergic Blocking Agents: Therapeutic Uses Respiratory Blocking the cholinergic incitement of the PSNS permits unopposed activity of the SNS. Comes about: Decreased emissions from nose, mouth, pharynx, bronchi Relaxed smooth muscles in bronchi and bronchioles Decreased aviation route resistance Bronchodilation

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Cholinergic Blocking Agents: Therapeutic Uses Respiratory specialists are utilized to treat: Exercise-actuated bronchospasms Chronic bronchitis Asthma Chronic obstructive pneumonic infection

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Choliner

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