Medications Affecting The Nervous System

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04/28/22 Created by Amanda McBride 1 Medications Affecting the Nervous System Adrenergic blocking Drugs Anticonvulsants Antianxiety Antiparkinson Antipyschotic Antidepressants Narcotic analgesics Non narcotic analgesics Narcotic antagonists

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Transcript of Medications Affecting The Nervous System

  • 1. Medications Affecting the Nervous System Adrenergic blocking Drugs Anticonvulsants Antianxiety Antiparkinson Antipyschotic Antidepressants Narcotic analgesics Non narcotic analgesics Narcotic antagonists 06/03/09 Created by Amanda McBride

2. 06/03/09 Created by Amanda McBride 3. 06/03/09 Created by Amanda McBride 4. 06/03/09 Created by Amanda McBride 5. 06/03/09 Created by Amanda McBride 6. Adrenergic effects 06/03/09 Created by Amanda McBride Type Location Neurotrans mitter Effects ofstimulation Alpha1 Blood vessels Kidney Intestinal smooth muscle Liver Eye Norepinephrine EpinephrineVasoconstriction Decreased renin secreation Relaxation glycogenolysis BlinkingAlpha2Nerve endings Vascular smooth muscle Pancreatic beta cells platelets NorepinephrineEpinephrineInhibit release of norepinephrine Vasoconstriction Inhibit insulin secreation AggregationBeta1HeartEpinephrineIncreased HR, force of contraction, automaticity, rate of AV conduction Beta2Bronchioles Blood vessels GI tract Liver Urinary bladder EpinephrineBronchodilation Vasodilation Decreased motility Glycogenolysis Relaxed muscle 7. Adrenergic Drugs

  • Epinephrine
    • Cardiac arrest
    • Anaphylaxis
    • Hypotension
    • Shock
    • Nasal congestion

06/03/09 Created by Amanda McBride 8. Adrenergic blocking Drugs

  • Alpha adrenergic blocking
    • Drugs that block alpha adrenergic receptors
  • Beta adrenergic blocking
    • Drugs that block beta adrenergic receptors
  • Alpha/beta adrenergic blocking
    • Drugs that block both
  • Antiadrenergic drugs
    • Drugs that prevent the release of neurotransmitter norepinephrine

06/03/09 Created by Amanda McBride 9. Action

  • Stimulation of alpha adrenergic nerves results in vasoconstriction
  • If stimulation is interrupted or blocked the result is vasodilation

06/03/09 Created by Amanda McBride 10. Use of Alpha adrenergic blocking drugs

  • Hypertension caused by pheochromocytoma
  • hypertension

06/03/09 Created by Amanda McBride 11. Adverse effects

  • Weakness
  • Orthostatic hypotension
  • Cardiac arrhythmias
  • Hypotension
  • Tachycardia

06/03/09 Created by Amanda McBride 12. Contraindications, precautions, interactions

  • CAD
  • Used cautiously in pregnancy, recent MI

06/03/09 Created by Amanda McBride 13. Beta adrenergic Blocking drugs

  • Decrease the stimulation of sympathetic nervous system on certain tissues
  • Decreases heart rate
  • Dilates blood vessels
  • Decrease cardiac excitability
  • Decrease cardiac workload and oxygen consumption
  • Provides membrane stabilizing effects that contribute to the antiarrhythmic activity

06/03/09 Created by Amanda McBride 14. Uses

  • HTN
  • HF
  • Cardiac arrhythmia
  • Migraine
  • Angina
  • Glaucoma
  • Used to prevent reinfarction in pts with recent MI

06/03/09 Created by Amanda McBride 15. Adverse Reactions

  • Orthostatic hypotension
  • Bradycardia
  • Dizziness, vertigo, headache
  • GI
  • Bronchospasm with hx asthma
  • CHF

06/03/09 Created by Amanda McBride 16. Contraindications, precautions, interactions

  • Sinus bradycardia
  • HB
  • Heart failure
  • Asthma
  • Hypotension
  • Emphysema

06/03/09 Created by Amanda McBride 17. Alpha/Beta adrenergic blocking drugs

  • Block the stimulation of both receptors, resulting in peripheral vasodilation
  • Carvedilol
  • Labetalol

06/03/09 Created by Amanda McBride 18. Use

  • HTN
  • CHF, prevents progression of disease

06/03/09 Created by Amanda McBride 19. Adverse Reactions

  • Fatigue
  • Dizziness
  • Hypotension
  • Drowsiness
  • Insomnia
  • Weakness
  • Diarrhea
  • Chest pain
  • bradycardia

06/03/09 Created by Amanda McBride 20. Contraindications, precautions, interactions

  • Bronchial asthma
  • Decompensated heart failure
  • Severe bradycardia
  • Used cautiously in drug controlled CHF, chronic bronchitis, impaired hepatic or cardiac function
  • Page 289

06/03/09 Created by Amanda McBride 21. Beta blocker drugs 06/03/09 Created by Amanda McBride Non-selective beta blockers Cardio-selective beta blockers

  • Levobunolol
  • Nadolol
  • Pindolol
  • Propanolol
  • Sotalol
  • Timolol
  • Acebutolol
  • Atenolol
  • Betaxolol
  • Bisoprolol
  • Esmolol
  • Metoprolol
  • At high doses this effect is lost.

22. Nursing Process

  • Assessment
    • Vitals
    • Baseline assessment
  • Implementation
    • Take same time everyday
    • When given for cardiac arrhythmias, these drugs can provoke new or worsen existing ventricular arrhythmias
    • Orhtostatic hypotension
  • Evaluation
    • effectiveness

06/03/09 Created by Amanda McBride 23. Cholinergic effects 06/03/09 Created by Amanda McBride Organ Effects HeartDecreased rate Blood vessels vasodilation GI smooth muscle Increased tone and contractility Bronchial smooth muscle Increased tone and contractility Increased resp secreations PupilsConstriction 24. Uses

  • Urinary bladder atony
  • Paralytic ileus
  • Reversal of NMB agents
  • Alzheimers disease

06/03/09 Created by Amanda McBride 25. Anti-cholinergic drugs

  • Block the action of acetylcholine on the PNS.

06/03/09 Created by Amanda McBride 26. 06/03/09 Created by Amanda McBride System EffectCNS Stimulation followed by depression CVS Increase in heart rate Respiratory BronchodilationDecrease resp secretions GI Antispasmodic effects d/t decreased muscle tone and motility Miscellaneous effects Decreased salivary secretions and sweat glands, relaxation of urinary bladder 27. Uses

  • GI disorders
  • GU disorders
  • Resp disorders-bronchoconstriction. Atrovent
  • Cardiac disorders- HB, brady
  • Parkinsons disease
  • Pre-op

06/03/09 Created by Amanda McBride 28. Atropine

  • Belladonna plant
  • Used in symptomatic bradycardia

06/03/09 Created by Amanda McBride 29. Atrovent

  • COPD as a bronchodilator
  • Less thickening of resp secretions

06/03/09 Created by Amanda McBride 30. Scopolamine

  • Depresses CNS and causes amnesia, drowsiness, euphoria, relaxation and sleep
  • Used in motion sickness

06/03/09 Created by Amanda McBride 31. Spiriva

  • Long acting bronchodilator
  • Daily maintenance tx of bronchospasm assoc with COPD

06/03/09 Created by Amanda McBride 32. Extrapyramidal reactions 06/03/09 Created by Amanda McBride 33. 06/03/09 Created by Amanda McBride 34. Education

  • Take as prescribed
  • Hypotension
  • Do not stop taking abruptly
  • May cause dizziness or drowsiness
  • Dont use OTC cold, flu or decongestants without MD advice
  • Monitor own BP

06/03/09 Created by Amanda McBride 35. Antianxiety Drugs and Sedative-Hypnotic Drugs Benzodiazepines Ativan Valium Nonbenzodiazepines Buspar Sinequan atarax 06/03/09 Created by Amanda McBride 36. 06/03/09 Created by Amanda McBride 37. 06/03/09 Created by Amanda McBride 38. Actions

  • Block certain neurotransmitter receptor sites, norepinephrine.
  • High lipid solubility enters CNS easily.
  • Prevents the neurotransmission of the anxious perception and the bodys physcial reaction to the anxiety
  • Benzodiazepines exert their tranquillizing effect by potentiating the effects of GABA
  • Nonbenzodiazepines exert their action in various ways.

06/03/09 Created by Amanda McBride 39. Uses

  • Anxiety disorders
  • Panic attacks
  • Seizures
  • Alcohol withdrawa
  • Acute psychosis
  • Adjunct for pain

06/03/09 Created by Amanda McBride 40. Adverse Effects

  • Mild drowsiness-sedation
  • Lightheadedness, dizziness
  • Headache
  • Lethargy
  • Disorientation
  • Anger
  • Restlessness
  • Nausea
  • Visual disturbances

06/03/09 Created by Amanda McBride 41. Non benzodiazepines

  • Buspar
    • Not like benzos
  • Chloral hydrate
    • Doesnt suppress REM
    • Tolerance after 2 weeks of use.
    • Physical dependence.
  • Antidepressants
    • Prozac, Paxil, Effexor, Zoloft.
  • Imovane
    • Transient insomnia

06/03/09 Created by Amanda McBride 42. Dependence

  • Long term use may result in physical drug dependence and tolerance
  • With as little as 4-6 weeks of therapy with benzos

06/03/09 Created by Amanda McBride 43. Symptoms of withdrawal

  • Restlessness
  • Muscle or bone pain
  • Insomnia
  • Diarrhea
  • Vomiting
  • Cold flashes
  • Involuntary leg movements
  • Seizures
  • Increased anxiety
  • Nausea
  • Sweating
  • psychoses

06/03/09 Created by Amanda McBride 44. Prevention of withdrawal

  • Mild symptoms occur after 6-12 weeks of therapeutic doses.
  • Sever symptoms occur after 4 months of high doses.
  • Dose should be tapered, reduce 10-25% every 1-2 weeks over 4-16 weeks.

06/03/09 Created by Amanda McBride 45. Antidote

  • Anexate competes with benzo receptors.
  • Onset within 2 mins peaks within 6-10 mins.
  • Half life 60-90 mins.

06/03/09 Created by Amanda McBride 46. Contraindications

  • Pregnancy
  • Lactation

06/03/09 Created by Amanda McBride 47. Precautions, Interactions

  • Used cautiously in elderly pts
  • Impaired liver and kidney function
  • Page 230

06/03/09 Created by Amanda McBride 48. Nursing Process

  • Assessment
    • Vitals
    • Assessment
  • Implementation
    • Observe pt closely for new tx
    • Report signs of tolerance
  • Evaluation
    • Therapeutic effect is achieved

06/03/09 Created by Amanda McBride 49. Education

  • Take as prescribed
  • Dont discontinue abruptly
  • Avoid driving
  • Avoid alcohol
  • Try to find healthier coping mechanisms.

06/03/09 Created by Amanda McBride 50. Opioids

  • Rx for pain relief, post-op, cough, acute pulm edema, and diarrhea
  • Attach to opioid receptors in the brain, spinal cord and GI tract
  • Cause euphoria by affecting the brain regions that mediate what we perceive as pleasure

06/03/09 Created by Amanda McBrideCreated by Amanda McBride 51. Opioid Analgesics

  • Uses
    • Treatment of mod to severe pain
    • Obstetric pain
    • Anxiety related dyspnea
    • Opiate dependence
    • Relieve persistent cough

06/03/09 Created by Amanda McBride 52. How they work

  • Increase norepinephrine and dopamine
  • Increases BP, HR, constricts blood vessels, increases blood glucose and opens resp pathways
  • Increase Dopamine is associated with a sense of euphoria

06/03/09 Created by Amanda McBrideCreated by Amanda McBride Created by Amanda McBride 53. The WHO Pain Ladder 06/03/09 Created by Amanda McBride 06/03/09 Created by Amanda McBride 54. Pain

  • Subjective
  • Cultural
  • Acute
  • Chronic
  • Can be affected by mood.
  • Complex

06/03/09 Created by Amanda McBride 55. Morphine

  • Half life 2-4 hours.
  • Accumulates in pts with liver or kidney dysfunction.
  • Other routes of admin, epidural, intrathecal, inhalation, rectal.

06/03/09 Created by Amanda McBride 56. Fentanyl

  • Very potent opioid.
  • Transdermal or IV
  • High risk of resp depression, given in monitored areas.

06/03/09 Created by Amanda McBride 57. Codeine

  • Weaker opioid.
  • Antitussive.
  • IV or PO

06/03/09 Created by Amanda McBride 58. Hydrocodone

  • Analgesic, antitussive
  • Similar to codeine.

06/03/09 Created by Amanda McBride 59. Hydromorphone

  • Similar to morphine.
  • Very potent.

06/03/09 Created by Amanda McBride 60. Meperidine

  • Similar to morphine
  • Preferred in pts with renal or biliary colic.
  • Less resp distress in newborns.
  • Normeperidine
    • Metabolite of meperidine
    • Accumulates with chronic use, renal failure, Dilantin, rifamipin.
    • Produces CNS stimulation, hallucinations, seizures, agitation, tremors.
    • Half life 15-30 hours
    • Narcan doesnt work.
    • Can precipitate serotonin syndrome in people who take MAOI, or amphetamines.

06/03/09 Created by Amanda McBride 61. 06/03/09 Created by Amanda McBride 62. Methadone

  • Similar to morphine
  • Longer duration.
  • Half life 15-30 hours.

06/03/09 Created by Amanda McBride 63. Oxycodone

  • Similar to codeine.
  • Crushing and snorting or injecting has led to deaths.

06/03/09 Created by Amanda McBride 64. Drug selection

  • Morphine, hydromorphone and methadone, non ceiling drugs.
  • Least potent drug, in smallest dosage for least amount of time.

06/03/09 Created by Amanda McBride 65. Drug dose

  • Choose according to pain type, severity, quality, pts size, age, health status.
  • Choose smallest dose 1 st.
  • Slowrelease for chronic
  • IV for acute or breakthrough.

06/03/09 Created by Amanda McBride 66. Patient Controlled Analgesic 06/03/09 Created by Amanda McBride 67. Epidural analgesia 06/03/09 Created by Amanda McBride 68. Uses

  • Decrease anxiety and sedate before surgery
  • Support anesthesia
  • Obstetric analgesia
  • Relieve anxiety in pts with dyspnea
  • Pain assoc with MI
  • Opiate dependence
  • Severe diarrhea
  • Persistent cough

06/03/09 Created by Amanda McBride 69. Adverse effects

  • Weakness, lightheadedness
  • Resp depression
  • Constipation, nausea
  • Tachycardia, bradycardia
  • Urinary retention
  • Rash
  • Sweating

06/03/09 Created by Amanda McBride 70. Contraindication, precautions, interactions

  • Acute bronchial asthma
  • Increased ICP
  • Convulsive disorders
  • Severe renal hepatic impairment
  • Pregnancy
  • Use cautiously in elderly
  • Opiate nave
  • Undx abdo pain
  • Hypoxia
  • SVT

06/03/09 Created by Amanda McBride 71. Nursing Process

  • Assessment
    • Vital signs
    • Assessment including pain
  • Implementation
    • Masking pain symptoms
    • Long acting and breakthru
    • Constipation prevention and tx
  • Evaluation

06/03/09 Created by Amanda McBride 72. PQRST Method for Pain Assessment

  • P =Provokes
    • What causes pain?
    • What makes it better?
    • Worse?
  • Q =Quality
    • What does it feel like?
    • Is it sharp?
    • Dull?
    • Stabbing?
    • Burning?
    • Crushing? ( Try to let patient describe the pain, sometimes they say what they think you would like to hear. )
  • R =Radiates
    • Where does the pain radiate?
    • Is it in one place?
    • Does it go anywhere else?
    • Did it start elsewhere and now localised to one spot?
  • S =Severity
    • How severe is the pain on a scale of 1 - 10?
  • ( This is a difficult one as the rating will differ from patient to patient. )
  • T =Time
    • Time pain started?
    • How long did it last?

06/03/09 Created by Amanda McBride 73. Education

  • No driving
  • No alcohol
  • Signs of tolerance
  • Take as prescribed
  • GI upset take food

06/03/09 Created by Amanda McBride 74. Opioid toxicity

  • Resp depression
  • Low BP
  • CNS depression
  • Narcan

06/03/09 Created by Amanda McBride 75. Treatment specific Disorders

  • Cancer
  • Post op
  • Burns
  • Biliary, renal or uretral colic

06/03/09 Created by Amanda McBride 76. Special populations

  • Opiate tolerant pts.
  • Use in children.
  • Use in older adults.
  • Renal impairment.
  • Hepatic impairment.
  • Home care.

06/03/09 Created by Amanda McBride 77. Opiate Antagonist

  • Action
    • Counteracts effect of narcotic
    • Competes for opiate receptors
  • Narcan
    • Short half life, repeated dosing usually needed.
    • Few adverse reactions.

06/03/09 Created by Amanda McBride 78. Use

  • Postop acute resp depression
  • Opioid reversal
  • Opioid overdose

06/03/09 Created by Amanda McBride 79. Adverse Effects

  • Nausea vomiting
  • Sweating
  • Tachycardia
  • Increased BP
  • tremors

06/03/09 Created by Amanda McBride 80. Contraindications, precautions, interactions

  • Used cautiously in pregnancy
  • Opioid dependency
  • CVS disease
  • May produce withdrawal in pts who are addicted

06/03/09 Created by Amanda McBride 81. Nursing Process

  • Assessment
    • Vitals
    • Assessment
    • Attempt to stimulate postop pt
  • Implementation
    • Balance need for pain control and resps
    • Keep suction close by for vomiting
    • If pain recurs must treat pain again

06/03/09 Created by Amanda McBride 82. Antidepressant Tricyclic Antidepressants SSRI Misc 06/03/09 Created by Amanda McBride 83. Depressive disorders

  • Depressive disorders are mental illnesses characterized by deep, long-lasting feelings of sadness or despair. The patient may also lose interest in things that were once pleasurable. Changes in sleep patterns, appetite, and mental processes may also accompany depressive disorders. Depressive disorders are also known simply as depression or as unipolar (one-sided) depression

06/03/09 Created by Amanda McBride 84. Tricyclic Antidepressants

  • Action
    • Increasing and decreasing sensitivity to neurotransmitters
  • Uses
    • Depressive episodes
    • Obsessive compulsive disorders
    • Chronic neuropathic pain
    • Anxiety disorders
    • enuresis

06/03/09 Created by Amanda McBride 85. Adverse Reactions

  • Anticholinergic effects
  • Constipation
  • Photosensitivy

06/03/09 Created by Amanda McBride 86. Contraindications, Precautions, Interactions

  • MAOI
  • Recent MI
  • Children
  • Pregnancy
  • Used cautiously in cardiac disease, hepatic, renal impairment, glaucoma, urinary retention, risk of suicidal behaviour
  • Page 244

06/03/09 Created by Amanda McBride 87. Selective Serotonin Reuptake Inhibitors 06/03/09 Created by Amanda McBride 88. Actions

  • Increase in serotonin levels is thought to act as a stimulant to reverse depression

06/03/09 Created by Amanda McBride 89. Uses

  • Depressive episodes
  • Obsessive compulsive disorders
  • Bulimia nervosa
  • Panic
  • Premenstrual syndrome
  • Post traumatic stress disorder
  • Generalized anxiety
  • Migraines

06/03/09 Created by Amanda McBride 90. Adverse Reactions

  • Somnolence
  • Dizziness
  • Headache
  • Insomnia
  • Tremor
  • Weakness
  • Constipation, dry mouth, nausea
  • Pharyngitis

06/03/09 Created by Amanda McBride 91. Contraindications, Precautions, Interactions

  • Pregnancy
  • use cautiously in diabetes, cardiac disease, liver renal impairment, suicidal ideation
  • Page 246

06/03/09 Created by Amanda McBride 92. Nursing Process

  • Assessment
    • Medical history
    • Psych assessment
  • Implementation
    • Response is not rapid
    • Orthostatic hypotension
    • Dont stop abruptly
    • Report any suicidal ideation
  • Evaluation
    • Effect

06/03/09 Created by Amanda McBride 93. Education

  • If dizziness occurs, rise slowly
  • Keep appts
  • Report any unusual effects
  • Take as prescribed

06/03/09 Created by Amanda McBride 94. Symptoms of Psychosis

  • False personal beliefs that are not part of reality
  • Truly believes something that doesnt make sense to others
  • around them, and any reasoning and showing evidence that contradicts
  • their belief doesnt convince them that their belief is false
  • Includes the belief that they are being spied on, plotted against,
  • harmed or tormented; many report receiving messages from the
  • radio or television
  • Sensing things that arent actually there
  • Includes hearing, seeing, smelling, tasting or feeling things
  • that others dont perceive
  • The most common hallucinations involve hearing voices usually
  • saying negative, critical or frightening things to the person,
  • warning of danger, or even giving orders
  • Being unable to "think straight"
  • Organizing thoughts is difficult, making it impossible to
  • communicate clearly with others
  • Unable to concentrate on one thought for very long; thoughts may
  • come and go quickly
  • Unable to connect thoughts into logical sequences; thoughts are
  • often blocked and become fragmented
  • Being emotionally disturbed or excited
  • Includes appearing disturbed, excited, restless or hyperactive
  • Trying to seem very important
  • Believe that they are powerful, wealthy, very intelligent, famous or
  • have special powers
  • Being untrusting and guarded
  • Might think they are being watched, followed, persecuted or
  • conspired against
  • Acting unfriendly and showing ill feelings towards
  • others
  • Behaving in an abusive, sarcastic and difficult manner

06/03/09 Created by Amanda McBride 95. Antipsychotic Drugs

  • Act by inhibiting or blocking the release of neurotransmitter dopamine

06/03/09 Created by Amanda McBride 96. Uses

  • Acute or chronic pyschosis
  • Bipolar illness
  • Agitated behaviours associated with dementia

06/03/09 Created by Amanda McBride 97. Adverse Reactions

  • Sedation, headache, hypotension, dry mouth, urticaria
  • Behavioural changes, increase in psychotic symptoms
  • Lethargy, hyperactivity, paranoid reactions, agitation, confusion

06/03/09 Created by Amanda McBride 98. Extrapyramidal Symptoms

  • Extrapyramidalsymptoms(EPS) are the variousmovement disorderssuch astardive dyskinesiasuffered as a result of takingdopamine antagonists , usuallyantipsychotic(neuroleptic)drugs , which are often used to controlpsychosis , especiallyschizophrenia . Otherantidopaminergicdrugs like theantiemetic metoclopramideor thetricyclic antidepressant amoxapinecan also cause extrapyramidal side effects

06/03/09 Created by Amanda McBride 99. Tardive Dyskinesia

  • Tardive dyskinesia is characterized by repetitive, involuntary, purposeless movements. Features of the disorder may include grimacing, tongue protrusion, lip smacking, puckering and pursing of the lips, and rapid eye blinking. Rapid movements of the arms, legs, and trunk may also occur. Impaired movements of the fingers may appear as though the patient is playing an invisible guitar or piano. Patients with Parkinson's disease have difficulty moving, while patients with tardive dyskinesia have difficultynotmoving .

06/03/09 Created by Amanda McBride 100. NeurolepticMalignant Syndrome

  • Rare, fatal complication
  • Clinical manifestations:
  • Hyperthermia
  • Hypertonicityof skeletal muscles
  • Mental changes
  • Autonomic instability

06/03/09 Created by Amanda McBride 101. Contraindications, Precautions, Interactions

  • Severely depressed
  • Blood dyscrasias
  • Liver impariment
  • Sever hypo/hypertension
  • Used cautiously in resp disorders, epilepsy, renal impairment, PUD
  • Page 267

06/03/09 Created by Amanda McBride 102. Nursing Process

  • Assessment
    • Psych assessment
  • Implementation
    • As prescribed
    • Safety
  • Evaluation
    • Effect

06/03/09 Created by Amanda McBride 103. Education

  • Keep appts
  • Report any unusual effects
  • No alcohol
  • Avoid sun exposure

06/03/09 Created by Amanda McBride 104.

  • Epilepsy is a brain disorder in which clusters of nerve cells, or neurons, in the brain sometimes signal abnormally. In epilepsy, the normal pattern of neuronal activity becomes disturbed, causing strange sensations, emotions, and behavior or sometimes convulsions, muscle spasms, and loss of consciousness. Epilepsy is a disorder with many possible causes. Anything that disturbs the normal pattern of neuron activity - from illness to brain damage to abnormal brain development - can lead to seizures. Epilepsy may develop because of an abnormality in brain wiring, an imbalance of nerve signaling chemicals called neurotransmitters, or some combination of these factors. Having a seizure does not necessarily mean that a person has epilepsy. Only when a person has had two or more seizures is he or she considered to have epilepsy. EEGs and brain scans are common diagnostic test for epilepsy .

06/03/09 Created by Amanda McBride 105. 06/03/09 Created by Amanda McBride 106. 06/03/09 Created by Amanda McBride 107. 06/03/09 Created by Amanda McBride 108. Status Epilepticus

  • A state of continuous seizures or repetitive, discrete seizures with impaired consciousness in the interictal period
    • Duration
      • Traditional criterion: 1530 minutes
      • Practical criterion: duration prompting acute use of anticonvulsant therapy; typically > 5 minutes
    • May occur with all type of seizures: grand mal (tonic-clonic) status, myoclonic status, petit mal status, and temporal lobe (complex partial) status
    • Associated with major cerebral and systemic physiologic changes
      • Initial stage (first 3060 minutes)
        • Cerebral metabolism is greatly increased because of seizure activity, but physiologic mechanisms are sufficient to meet the metabolic demands.
        • Cerebral: increased blood flow, increased metabolism
        • Autonomic and cardiovascular: hypertension, increased cardiac output, massive catecholamine release, tachycardia, arrhythmias, hyperpyrexia
        • Metabolic: lactic acidosis, hyperglycemia
      • Decompensated phase
        • Cerebral metabolic demands cannot be fully met, resulting in hypoxia and altered cerebral and systemic metabolic patterns.
        • Cerebral: hypoxia, hypoglycemia, increased intracranial pressure
        • Autonomic and cardiovascular: hypoxia, hypotension, hyperpyrexia
        • Metabolic: hypoglycemia, hyponatremia, hyperkalemia, metabolic acidosis
    • Generalized status is life threatening when accompanied by hyperpyrexia, acidosis (from prolonged muscle activity), and respiratory or cardiovascular compromise.

06/03/09 Created by Amanda McBride 109. 06/03/09 Created by Amanda McBride 110. Anticonvulsants

  • Action
    • Benzodiazepines
      • Inhibit uptake of GABA
    • Hydantoins
      • Stabilize the hyperexcitability
  • Uses
    • Seizures
    • Neuropathic pain
    • Bipolar disorders
    • Anxiety disorders

06/03/09 Created by Amanda McBride 111.

  • Adverse
    • Drowsiness, weakness, dizziness
    • Headache, somnolence
    • Slurred speech, ataxia, nystagmus
    • Nausea, vomiting, anorexia
    • Rash, urticaria
    • Ataxia
  • Contraindicated
    • Dilantin in bradycardia and HB
    • Pregnancy
    • CNS depression
  • Precautions
    • Liver renal impairment
  • Interactions

06/03/09 Created by Amanda McBride 112. Dilantin

  • Not to be given IM
  • Not stable in D5W
  • Interacts with many medications.

06/03/09 Created by Amanda McBride 113. Gabapentin

  • Partial seizures
  • Treat neuralgia pain.
  • Chronic pain syndromes
  • Adjunct therapy in post ortho pt.

06/03/09 Created by Amanda McBride 114. Phenobarbital

  • Long acting barbiturate.
  • Half life 50-140 hours

06/03/09 Created by Amanda McBride 115. Drug Selection

  • Type of seizure
  • Generalized seizures
    • valproic acid
    • Dilantin
  • Partial seizures
    • Gabapentin, phenobarb, Dilantin
  • Adverse effects
    • CNS depression
    • Cognitive impairment

06/03/09 Created by Amanda McBride 116. Nursing Process

  • Vitals
  • Neuro assessment
  • History of seizure type/activity
  • Implementation
    • Do not stop abruptly
  • Evaluation
    • Blood levels
    • effect

06/03/09 Created by Amanda McBride 117. Monitoring Anti-Epileptic drug therapy

  • Pt response
  • Serum drug levels periodically
  • Monitor for toxicity
  • Baseline bloodwork.
  • Changes made gradually over 2-3 months

06/03/09 Created by Amanda McBride 118. Toxicity

  • Fatalities have been assoc with all AED
  • SS are extensions of adverse effects
    • CNS depression
    • Coma
    • Resp depression
    • CVS problems
    • Life threatening.

06/03/09 Created by Amanda McBride 119. Antiparkinsonism Drugs

  • Action
    • Stimulate dopamine receptor sites
  • Uses
    • Parkinsons disease
    • RLS
    • Viral infections

06/03/09 Created by Amanda McBride 120. Adverse Effects

  • Dry mouth, anorexia, nausea, vomiting, abdo pain, constipation
  • Increased hand tremor
  • Headache
  • Dizziness
  • Choreiform movement:ceaseless occurrence of rapid, highly complex jerky movements that appear to be well coordinated but are performed involuntarily
  • Dystonia is a syndrome of spasms and sustained contractions of the muscles. These muscle movements are not under voluntary control and they result in repetitive abnormal movements of parts of the body or persistently abnormal postures.

06/03/09 Created by Amanda McBride 121. Contraindications, Precautions, Interactions

  • Glaucoma
  • MAOI
  • Levodopa can activate malignant melanoma
  • Used cautiously in CVS or pulm diseases, PUD, renal or hepatic impairment, pychosis
  • Interactions pg 327

06/03/09 Created by Amanda McBride 122. Nursing Process

  • Assessment
    • ADLs
    • Neuro assessment
    • Neuro muscular assessment
  • Implementation
    • Psychosis
  • Evaluation
    • Effect

06/03/09 Created by Amanda McBride 123. Education

  • Do not use alcohol
  • GI upset
  • Pts with diabetes, drug may affect urine testing
  • Keep all appts

06/03/09 Created by Amanda McBride