Neuro Flashcards
Centrally acting muscle relaxants
Indication
Treat muscle spasms from spinal cord injury, MS, CP, or injury
Centrally acting muscle relaxants
Prototype
Baclofen (Lioresal)
Centrally acting muscle relaxants
MOA
Enhance inhibitory effects of GABA on spinal cord, which suppresses hyperactive reflexes
Centrally acting muscle relaxants
Major adverse effects
Drowsiness, dizziness, muscle weakness, constipation, withdrawal symptoms if stopped suddenly (anxiety, hallucinations, seizures)
Centrally acting muscle relaxants
administration
-PO with lowest effective dose and gradual increase
-Give with food or milk
-Can give via intrathecal infusion into spine too
Centrally acting muscle relaxants
Safety
-Rhabdomyolysis due to abrupt discontinuation from intense muscle contractions, kidney damage ensues
-avoid alcohol
Centrally acting muscle relaxants
Contraindications
Hypersensitivity
MAOIs within past 2 weeks = CNS depression
CVA or seizure disorder
Peripherally acting muscle relaxants
Indication
relax skeletal muscle spasms from CVA, spinal cord injury, MS, and CP
Prevent malignant hyperthermia
Peripherally acting muscle relaxants
Prototype
Dantrolene (Dantrium)
Peripherally acting muscle relaxants
MOA
Inhibit release of calcium from muscle cells, which inhibits muscle contraction
Reverses malignant hyperthermia in IV form
Peripherally acting muscle relaxants
Adverse effects
Drowsiness, dizziness, muscle weakness, diarrhea
Liver toxicity
Peripherally acting muscle relaxants
Admin
PO or IV
(IV for malignant hyperthermia)
Peripherally acting muscle relaxants
Contraindications
Liver disease
Peripherally acting muscle relaxants
Safety
-Use with alcohol and other CNS depressants = resp depression
-use with estrogen = liver toxicity
Hydantoins (AED)
Indication
Control tonic-clonic seizures
Hydantoins (AED)
Prototype
Phenytoin (Dilantin)
Hydantoins (AED)
MOA
Decrease neuron activity by inhibiting influx of sodium
Hydantoins (AED)
Adverse effects
Drowsiness, gingival hyperplasia among children and teens, skin rash can indicate Steven Johnson or become septic
Hydantoins (AED)
Safety
-abrupt discontinuation can cause status epilepticus
-narrow therapeutic range (ataxia, nystagmus, sedation)
-reduces BC effectiveness
Hydantoins (AED)
Admin
Give with food
-Inject IV slowly because phenytoin acts on heart too (abrupt reduction in sodium influx can cause dysrhythmias or arrest)
Hydantoins (AED)
Contraindications
Pregnancy
Skin rash
Bradycardia/heart block
Allergy to hydantoins
Traditional AED/Anticonvulsants
Indication
Treats tonic clonic and partial seizures
Mood stabilizer for bipolar
Helps trigeminal neuralgia pain
Traditional AED/Anticonvulsants
Prototype
Carbamazepine (Tegretol)
Traditional AED/Anticonvulsants MOA
Inhibit sodium influx into neurons, which decreases electric activity
Traditional AED/Anticonvulsants
Adverse effects
Nystagmus, headache, blurred vision, ataxia (CNS depression)
Fluid retention
Skin rash - Steven’s Johnson
Photosensitivity reaction
Bone marrow suppression
Traditional AED/Anticonvulsants
Admin
Give with meals
Must be given consistently to avoid seizures (i.e., take with a sip of water if NPO for procedure)
Interacts with grapefruit
Traditional AED/Anticonvulsants
Safety
Monitor WBC prior to giving carbamezapine
Monitor for skin rash
Instruction:
Driving
Sunscreen
Lowers BC effectiveness
Report fever and easy bruising (bone marrow suppression)
Traditional AED/Anticonvulsants
Contraindications
Absence or myoclonic seizures
Pregnancy (weigh risks)
Heart failure or hematologic disorder
Valproic acid/Valproate
Indications
Anticonvulsant (Treats all types of seizures)
Controls mania with bipolar
Migraine treatment
Valproic acid/Valproate
Prototype
Valproic acid (Depakote, Depacon, Depakene)
Valproic acid/Valproate
MOA
Inhibits sodium influx into neurons and also may affect calcium influx and enhance GABA
Valproic acid/Valproate
Adverse reactions
GI upset
Bruising, bleeding due to bone marrow suppression
Rash
Liver toxicity (more common in first few months)
Hyperammonemia (valproic acid alters fatty acid metabolism)
Valproic acid/Valproate
Admin
PO or IV
Enteric coated and take with food to avoid GI upset
Can sprinkle on food
Valproic acid/Valproate
Safety
Review lab results for ammonia, platelets, and bleeding time
Monitor for pancreatitis (rise in serum amylase)
Monitor for liver function, jaundice, abdominal pain
Valproic acid/Valproate
Contraindications
Pregnancy
Liver disorder
Blood clotting disorders
Use of other anticonvulsants
Cholinesterase inhibitors
Indication
improve cognitive function in mild to moderate dementia
Cholinesterase inhibitors
Prototype
Donepezil (Aricept)
Cholinesterase inhibitors
MOA
Inhibits acetylcholinesterase from breaking down acetylcholine, causing an increase in acetylcholine
Cholinesterase inhibitors
Adverse effects
GI effects: Nausea, GI bleed
Neuro effects: insomnia, dizziness, headaches
Cardiac effects: Bradycardia, syncope
Cholinesterase inhibitors
Admin
Give at bedtime with or without food
Tabs, orally disintegrating tabs, syrup
Cholinesterase inhibitors
Safety
Monitor for GI bleeding
Assist with ambulation
Cholinesterase inhibitors
Contraindications
Children
GI bleeding
NMDA Receptor Antagonist
Indication
Slow physical functioning and cognitive decline in moderate to severe Alzheimer’s
NMDA Receptor Antagonist
Prototype
Memantine (Nementa)
NMDA Receptor Antagonist
MOA
Blocks glutamate from stimulating NMDA receptors, which decreases calcium influx into neurons and restores normal impulse transmission
NMDA Receptor Antagonist
Adverse effects
Dizziness, confusion
Constipation
NMDA Receptor Antagonist
Contraindications
Renal failure
Immunomodulators
Indication
Multiple sclerosis
Immunomodulators
Prototype
Interferon beta1-A (Avonex)
Interferon beta1-B (Betaseron)
Immunomodulators
MOA
Inhibits movement of leukocytes across BBB, which prevents myelin sheath damage
Immunomodulators
adverse effects
flu symptoms
decrease of all blood cell types
liver toxicity
Immunomodulators
Admin
IM or subq
requires liver testing and intermittent thyroid testing
Serotonin agonists
Indication
Pain relief for migraines and cluster headaches
Serotonin agonists
Prototype
Sumatriptan (Imitrex)
Serotonin agonists
MOA
Activate 5-HT (serotonin) receptors, which promotes vasoconstriction and supresses release of CGRP
This prevents inflammatory response
Serotonin agonists
Adverse effects
Chest heaviness (vasoconstriction in lungs)
Vasospasm of coronary vessels
Tingling
vertigo
Serotonin agonists
Admin
PO, nasal spray, or subq
Serotonin agonists
Contraindications
MI, CAD, angina, peripheral vascular disease, CVA
Amphetamines
Indication
ADHD
narcolepsy
Amphetamines
Prototype
Amphetamine/dextroamphetamine sulfate(adderall)
Amphetamines
MOA
Increase release of norepinephrine and dopamine, which causes alertness, improved mood, better concentration, reduced hyperactivity, and sympathetic NS effects
Amphetamines
Adverse effects
Hypertension
Anxiety
Appetite suppression
Abuse/tolerance/withdrawal
Toxicity - looks like paranoid schizophrenia
Amphetamines
Admin
PO, DO NOT CRUSH
Give in the morning to avoid insomnia
Drug holidays for children to prevent growth suppression
Amphetamines
Contraindications
Hyperthyroidism
Severe hypertension
cardiovascular disease
Methylphenidate
indication
CNS Stimulant:
ADHD
Narcolepsy
Methylphenidate
Prototype
Methylphenidate (Ritalin, Concerta)
Methylphenidate
MOA
Increase release of norepinephrine and dopamine in brain and PNS
Methylphenidate
Adverse effects
Same as amphetamines (toxicity, appetite suppression, sympathetic effects)
Methylphenidate
admin
PO or patch
Some capsules can be opened and sprinkled in applesauce
Local anesthetic
Indication
When small areas of the body require anesthesia or client cannot have general anesthesia
Local anesthetic
Prototype
Lidocaine (xylocaine)
also procaine (Novocain) -this is the ester type
Local anesthetic
MOA
Prevents depolarization by inhibiting influx of sodium into neurons through sodium channels
Local anesthetic
Adverse effects
CNS stimulation - restlessness, tremors, confusion, irritability
After CNS stimulation wears off, CNS depression can occur: respiratory depression
Hypotension and headaches with spinal admin
Bradycardia or heart block
Local anesthetic
Admin
Topical
Epidural
Spinal
IM
Nerve block
IV for regional anesthesia
General anesthesia/short-acting barbiturates
Indication
Rapid induction of anesthesia and hypnosis for brief procedures or an adjunct to other drugs for longer procedures
General anesthesia/short-acting barbiturates
Prototype
Methohexital sodium (Brevital White)
Propofol (Diprivan) - most widely used IV
General anesthesia/short-acting barbiturates
MOA
Enhance inhibitory effects of GABA and cause significant CNS depression
General anesthesia/short-acting barbiturates
Adverse effects
therapeutic doses- bradycardia and hypotension
Higher doses - tachycardia due to compensation and respiratory depression
General anesthesia/Benzodiazepines
Indication
Sedation prior to general anesthesia, moderate or conscious sedation with amnesia, and adjunct to inhaled anesthesia for surgery
General anesthesia/Benzodiazepines
Prototype
midazolam (Versed)
also, diazepam (Valium)
General anesthesia/Benzodiazepines
MOA
CNS depressant and hypnotic - enhance inhibitory effects of GABA
General anesthesia/Benzodiazepines
Adverse effects
Amnesia is normal side effect
Cardiac or respiratory arrest possible
General anesthesia/Benzodiazepines
Admin
Inject IV bolus slowly over at least 2 minutes and monitor VS
IM admin before procedure
PO for children
Used with opioids for conscious sedation
General anesthesia/Benzodiazepines
Contraindications
Pregnancy
General anesthesia/Opioids
Indication
Adjunct to anesthesia for their sedative and pain relief effects
General anesthesia/Opioids
Prototype
fentanyl (Duragesic)
General anesthesia/Opioids
MOA
narcotic agonist - bind to mu receptors and inhibits pain impulses similarly to natural opioids
General anesthesia/Opioids
Adverse effects
Resp. depression
Constipation
Circulatory collapse
Nausea
Dopaminergic agents
Indication
Parkinsons symptom relief
Dopaminergic agents
prototype
levadopa/carbadopa (Simenet)
Dopaminergic agents
MOA
crosses BBB and is taken up by dopaminergic neurons in the substantia nigra, where it is converted to dopamine
Dopaminergic agents
Adverse effects
Dyskinesias
Orthostatic hypotension
Nausea
Inappropriate behaviors
Dopaminergic agents
Admin
Give with food
Avoid high-protein foods because they reduce absorption
may cause dark urine and sweat
Dopaminergic agents
Contraindications
Melanoma
Hx of suicidal or psychosis
glaucoma
Dopamine agonists
Indication
Parkinson’s relief
restless leg syndrome
Dopamine agonists
Prototype
Pramipexole (Mirapex)
Dopamine agonists
MOA
Bind to dopamine receptors and mimic natural dopamine
Dopamine agonists
Adverse effects
Sleep attacks
Orthostatic hypotension
Dyskinesias
Nausea (stimulates chemoreceptor trigger zone)