Module Neuro 1 Flashcards
baclofen (Lioresal) class
centrally acting muscle relaxant
baclofen (Lioresal) expected pharmacologic action
enhance inhibitory effects of GABA on receptors in the spinal cord, results in suppression of hyperactive reflexes
baclofen (Lioresal) adverse drug reactions
drowsiness, dizziness, weakness, fatigue
nausea, vomiting, constipation, urinary retention rare but possible
baclofen (Lioresal) nursing considerations
take oral doses with food to decrease gastric irritation
encourage fluids and dietary fiber to avoid constipation
centrally acting muscle relaxants - name prototype and others
baclofen (Lioresal)
carisoprodol (Soma)
chlorzoxazone (Parafon Forte)
cyclobenzaprine (Flexeril)
baclofen (Lioresal) contraindications
known hypersensitivity
use of MAOI antidepressants
centrally acting muscle relaxant interactions
avoid alcohol or other CNS depressants
serotonin syndrome can occur if cyclobanzaprine is given to patient on SSRIs, SSNRIs, or tricyclic antidepressants
baclofen (Lioresal) therapeutic use
spinal cord injury
multiple sclerosis
cerebral palsy
peripherally acting muscle relaxants prototype
dantrolene (Dantrium)
dantrolene (Dantrium) class
peripherally acting muscle relaxant
dantrolene (Dantrium) therapeutic use
prevent muscle spasms in CVA, stroke, spinal cord injury, MS, CP
prevent malignant hyperthermia
dantrolene (Dantrium) adverse drug reactions
weakness
drowsiness
dizziness
diarrhea
liver toxicity
dantrolene (Dantrium) nursing considerations
assess muscle strength during treatment
monitor for CNS effects
monitor for diarrhea
monitor liver function
dantrolene (Dantrium) contraindications
liver disease
dantrolene (Dantrium) precautions
cardiac disease
pulmonary disease
neuromuscular disorders
age over 35 years - increased risk for liver damage
dantrolene (Dantrium) interactions
age over 35 and use of estrogen can lead to liver toxicity
avoid use with alcohol or CNS depressants
can cause cardiac dysrhythmias if taken with calcium channel blockers
baclofen (Lioresal) precautions
patients with:
severe mental illness
seizure disorders
stroke
older adults and children under 2 years
AEDs
anti-epileptic drugs
what are hydantoins?
help control tonic-clonic seizures and partial seizures
hydantoins - name prototype and others
phenytoin (Dilantin)
fosphenytoin (Cerebyx)
expected pharmacologic action of hydantoins
decrease neuronal activity by inhibiting influx of sodium through sodium channels
hydantoins - adverse drug reactions
drowsiness
CNS depression
gingival hyperplasia - abnormal tissue growth around gums
skin rash
abrupt discontinuation can lead to recurrence of seizures
hydantoins - nursing actions
monitor for drowsiness and CNS effects
observe gums for hyperplasia
monitor for rashes
phenytoin should be given with meals to prevent GI distress
what precautions should be taken when administering phenytoin IV?
no more than 50 mg per minute, no more than 25 mg per minute for older adults
injecting drug too quickly can cause cardiac collapse
monitor vital signs to identify dysrhythmias or hypotension
hydantoins contraindications
pregnancy - teratogenic
skin rash
bradycardia
heart block
hydantoin allergy
seizures caused my low blood sugar
hydantoins precautions
liver or kidney disease
cardiac dysfunction
diabetes mellitus
respiratory dysfunction
history of alcoholism = high risk of toxicity
phenytoin (Dilantin) interactions
diazepam, isoniazid, cimetidine, valproic acid increase levels of phenytoin
alcohol use can increase or decrease phenytoin levels
phenobarbital and carbamazepine decrease phenytoin levels
carbamazepine (Tegretol) class
anticonvulsant
carbamazepine (Tegretol) therapeutic use
partial seizures
tonic-clonic seizures
mood stabilizer for bipolar
reduces trigeminal neuralgia pain
carbamazepine (Tegretol) adverse drug reactions
visual disturbances
ataxia
headache
skin rash
photosensitivity
carbamazepine (Tegretol) considerations
give before bed to avoid side effects during daytime
give with meals
monitor WBC and CBC counts
monitor for skin rash
Asian patients may have genetic predisposition to severe skin reaction
protect from sun exposure
carbamazepine (Tegretol) contraindications
pregnancy - teratogenic
absence or myoclonic seizures
hematologic disorders
heart failure
MAOI use in last two weeks
concurrent use of nefazodone or NNRTIs
carbamazepine (Tegretol) precautions
cardiac or hepatic disease
alcoholism
carbamazepine (Tegretol) interactions
grapefruit juice increases levels
false negative pregnancy test
decrease efficacy of oral contraceptives
some antifungals and antiretrovirals can increase levels
phenytoin and others decrease plasma levels
valproic acid class
anticonvulsant
valproic acid brand names
Depakote, Depacon, Depakene
valproiic acid therapeutic use
all seizure types
controls mania in bipolar
prevents migraines
valproic acid adverse drug reactions
brusing, bleeding, decreased platelets
GI symptoms
skin rash
neural tube defect in pregnancy
hyperammonemia
pancreatitis
liver toxicity
valproic acid considerations
monitor bleeding, bruising, platelet count
give with food
use ER form
monitor for rash
folic acid supplementation in pregnancy
assess for vomiting, confuson
liver function tests
valproic acid contraindications
pregnancy and lactation
liver disorders
concurrent use of other anticonvulsants
valproic acid precautions
kidney disease
older adults
children younger than 2 years
valproic acid expected pharmacologic action
inhibiting influx of sodium through sodium channels
may enhance inhibitory effects of GABA
local anesthetics - prototype and others
lidocaine (Xylocaine)
procaine (Novocain)
benzocaine (Americaine)
local anesthetic expected pharmacologic action
blocks influx of sodium through sodium channels
prevents depolarization
prevents action potentials from being activated
local anesthetics adverse drug reactions
CNS stimulation - restlessness, irritability, tremors, confusion, convulsions
local anesthetics nursing considerations
monitor vital signs
do not place in eyes or broken skin
ask patient to report paresthesias - tingling or pain
ask patient to report breathing difficulties
lidocaine contraindications
previous allergy
viscous lidocaine should not be used in children under 3
lidocaine interactions
beta blockers, quinidine, cimetidine increase level in blood
concurrent administration of procainamide increases risk of CNS and cardiac effects
phenytoin increases risk of cardiac effects
Barbituates - General Anesthetics - Intravenous anesthetics
name the prototype drug and others
methohexital sodium (Brevital) is the prototype
propofol (Diprivan) most widely used
therapeutic use of general anesthesia barbiturates
rapid induction of anesthesia and hypnosis for brief procedures
adjunct anesthesia with other anesthetic agents if procedure is longer than 15 minutes
general anesthesia barbiturate adverse drug reactions
respiratory depression
cardiovascular toxicity - tachycardia or hypotension
suicide or abuse
general anesthesia barbiturate nursing considerations
monitor vitals
IV injection should be slow
resuscitation equipment should be kept on hand
contraindications for general anesthesia barbiturates
known sensitivity
use precaution with hepatic and renal disease because they can prolong the effects of the drug
general anesthesia barbiturate interactions
potentiates CNS effects of other CNS depressants
giving with general benzodiazepine anesthetics will prolong anesthesia
general anesthesia benzodiazepines - name prototype and others
midazolam (Versed) is prototype
diazepam (Valium)
therapeutic use of general anesthetic benzodiazepines
sedation before general anesthesia
conscious sedations with induction of amnesia
supplement to inhalation anesthesia for surgeries
general anesthetic benzodiazepine adverse drug reactions
amnesia from time prior to injection
cardiac or respiratory arrest
general anesthetic benzodiazepine nursing considerations
monitor vitals
inject IV bolus slowly and wait at least 2 minutes between doses
resuscitation equipment on hand
general anesthetic benzodiazepine administration considerations
do not give IV bolus to neonate
can be given orally to children
can administer IM for conscious sedation
can combine with opioid for conscious sedation