eneuro Flashcards
DOC for absence seizures
ethoxsuximide
mechanism for ethosuximide
blocks thalamic T type Ca 2+ channels that trigger and sustain rhytmical burst discharges in thalamic neurons
SE of ethoSUXimide
EFGHIJ ethoxsuximide causes fatigue GI distress Headache itching (and urticaria) SJS
epilepsy benzodiazepines
diazepam, lorazepam, midazolam
DOC for status epilepticus
lorazepam
SE of epilepsy benzodiazepines
sedation tolerance, dependdance, resp depression
also for eclampsia seizures
benzodiazepines
1st line for eclampsia seizures
mgso4
phenobarbitol is 1st line in
neonates
SE of phenobarbitol
sedation, tolerance, depdence, induction of p450, cardiresp depression
phenobarbital treats which seizures
partial (focal), tonic-clonic
phenotoin, fosphenytoin mechanism of action
blocks na+ channels; 0 order kinetics
prophylaxis for status epilepticus
phenytoin
1st line for acute status epilepticus
benzodiazepines
Neurologic SE of phenytoin
nystagmus, diplopia, ataxia, sedation, peripheral neuropathy
derm se of phenytoin
hirsuitism, SJS, gingival hyperplasia, DRESS syndrome
MSK se of phenytoin
osteopenia, SLE-like syndrome
hematologic se of phenytoin
megaloblastic anemia
reproductive SE of phenytoin
teratogeniss (fetal hydantoin syndrome
other SE of phentyoin
cytochrome p450 induction
1st line for tonic clonic seizures
phenytoin , valproic acid
carbamazepine first line for
partial seizures
mechanism of action for carbamazzepin
blocks na+ channel (reduces aiblity of na channel to receover from inactivation)
SE of carbamezipne
dipolopia, ataxia, blood dyscrasisas (agranulocytosis aplastic anemia), liver toxicity, teratogensis, induction of cytochrone p450, SIADH, SJS; bone marrow suppression
1st line for trigeminal neuralgia
carbamezepin
episodic severe unilateral eelctrical shock like pattern distrubiton of CN5; symptoms triggered by innocus stimuli: shaving/ washing face
trigeminal neuralgia
mechanism of action for valproic acid
na+ channel inactivation, increase Gaba concentration by inhibiting gaba transaminase
SE of valproic acid:
GI distress, rare but fatal hepatoocity, pancreatitis, neural tube defects, tremor, weight gain, CI in pregnancy
1st line for myoclonic seizures
valproic acid
used in bipolar disorder and migraine prophylaxis
valproic acid
vigabatrin mechanism
increaese gaba by irreversibly inhibitng gaba transaminase
se of vigabatrin
permanent visual loss (black box warning)
vigabatrin treats
partial seizure
gabapentin mechanism
primarily inhibits high voltage activated ca channels; designed as gaba analog
se of gabapentin
sedation, ataxia, confusion
also used for peripheral neuropathy, postherpetic neuralgia
gabapentin
use of gabapentin
focal seizure
topiramate mechanism
blocks na+ channels, increase gaba action
SE of topiramate
sedation , mental dulling, KIDNEY STONES, weight loss, glaucoma
topiramte also used for migraine prevention
true
topiramate treats
partial, tonic clonic seizures
lamotrigine mechanism
blocks voltage gated na channels; inhibits release of glutamate; also effective for BPD
SE of lamotrigine
SJS; also
lamotrigine use
partial, tonic clonic, absence
levetiracetam mechanism
binds to synaptic vesicel protein (SV2A)
SE of levetiracetam
fatigue, drowsiness, headache, neuropsychiatric symptoms (personality changes)
use of levetiracetam
partial, tonic clonic
tiagabine use
partial
tiagabine mechaism
increase gaba by inhibiting reuptake
Juvenile mycolonus epilepsy treated with
valproic acid
DRESS SYDNROME
phenytoin
2-8 weekks after use of anticonvulsants, allopurinol, sulfonamides, antiboitics. pt’s get fever, generalized lymphadenopathy facial edema, diffuse morbiliform skin rash that progress to a confluent erythema w follicular accentaution; internal organ dysfucntion. lab studies: eosinophilia, atypical lymphocytes
dress sydnrome
thiopental is a
barbiturate
name the barbiturates
phenobarbital, pentobarbital, thiopental, secobarbital
mechanism of barbiturates
faciliate GABAa action by increasing duration of CL- channel opening, thus decrease neuron firing
contraindicated in porphyria
barbiturates
induction of anesthesia caused by which barbiutrate
thiopental
barbiturates use
sedative for anxiety, seizures, insomnia, induction of anesthesia
name the benzodiazepines
diazepam, lorazepam, traizolam, temazepam , oxazepam, midazolam, chlordiazepoxide, alprazolam
mechanism of benzodiazepines
facilitate GABAa action by increaseing frequency of CL- channel opening. Decreases rem sleep
benzodiazepines have short or long half lives
long half lives and active metabolites mostly