Epilepsy Flashcards
Seizure in which a large population of neurons in both hemispheres is involved immediately at the start of the seizure
generalized seizure
Seizure in which abnormal firing is limited to a specific area in 1 hemisphere
partial seizure
AED that has a weak effect on Na+ channels, increases GABA and decreases Ca2+ channel activity
Valproic Acid
AED that acts on Na+ channels as well as decreases glutamate release
Lamotrigine
AED that acts on Na+ channels as well as is a GABA agonist and a glutamate antagonist
Topiramate
Drug that acts on Na+ channels as well as Ca2+ channels
Zonisamide
6 AEDs that mainly act on Na+ channels
- Carbamazepine
- Oxcarbazepine
- Eslicarbazepine
- Phenytoin
- Lacosamide
- Rufinamide
Enzyme that synthesizes GABA from glutamate
glutamate decarboxylase
Inotropic GABA receptor that is a Cl- channel that is inhibitory of synaptic transmission
GABA-A
Metabotropic GABA receptor that inhibits neurotransmitter release
GABA-B
AED that is a product of rational drug design and decreases GABA reuptake through GABA transporters into neurons and glial cells
Tiagabine
AED that is an irreversible inhibitor of GABA transaminase, which is responsible for GABA metabolism
Vigabatrin
Black box warning on vigabatrin
irreversible concentric focal field loss
AED that also has sedative properties that binds to GABA-A receptor and increases its response to GABA
Phenobarbital
Class of AEDs that enhance the inhibitory action of GABA
Benzodiazepines
AED that is a Ca2+ channel inhibitor and is mainly used in absence seizures
Ethosuximide
2 AEDs that have a high affinity for the alpha2-delta binding site on voltage-gated Ca2+ channels and decrease the Ca2+-dependant release of neurotransmitters, including glutamate and NE
Gabapebtin and pregabalin
AED that binds with high affinity to synaptic vesicle protein (SV2A)
Levetiracetam
AED that is a K+ channel opener or stabilizer, stabilizing the resting membrane potential
Ezogabine
AED that is a non-competitive AMPA receptor antagonist
Perampanel
The hormonal influence on seizures in women who are menstrating
catamenial influence
Sudden, uncontrollable electrical discharges in normal brain activity
seizure
Recurrent, unprovoked seizures
Epilepsy
The most prevalent form of epilepsy
complex partial seizures
Seizure that involves loss of consciousness and tonic-clonic movements and often involves tongue bitting or incontinence
Grand mal seizure
Seizure that involves a brief episode (2-15 sec.) of staring, unable to respond
Absence seizure
Seizure that involves brief, bilateral jerk of neck, shoulders and legs
myoclonic seizure
Seizure that involves brief, bilateral stiffening of the body
tonic seizure
Seizure that involves sudden loss of muscle tone and people tend to drop things
atonic seizure
A seizure lasting for >30 min or with no recovery
status epilepticus
Treatment options for status epilepticus
IV benzodiazepines, phenytoin or phenobarbital
AED that has saturable metabolism, meaning a small increase in dose may cause a greater than expected increase in drug conc.
Phenytoin
Toxicities in phenytoin
nystagmus, ataxia, gingival hyperpasia, osteomalacia
AED in which the liver has auto-induction to and becomes more efficient at clearing the drug over time
Carbamazepine
Toxicities with carbamazepine
dizziness, diplopia, leukopenia, osteomalacia
Toxicities with oxcarbazepine
dizziness, diplopia, ataxia, hyponatremia
Toxicities in lacosamide
diplopia, HA, dizziness, nausea
AED that is metabolized by CYP3A4 but still has no clinically significant drug interactions
lacosamide
Uses of carbamazepine outside of epilepsy
bipolar disorder, pain
Use of lamotrigine outside of epilepsy
bipolar disorder
Toxicities with lamotrigine
sedation, diplopia, ataxia, nausea, rash
AED in which estrogen increases its clearance
lamotrigine
Toxicities in topiramate
difficulty concentrating, kidney stones, weight loss
Uses of topiramate outside of epilepsy
migraine prophylaxis, weight loss
AED that is a sulfonamide
Zonisamide
Toxicities with zonisamide
somnolence, dizziness, kidney stones, weight loss
Toxicities with phenobarbital
sedation, paradoxical hyperactivity, osteomalacia
Toxicities with ethosuximide
sedation, GI
Toxicities with valproic acid
sedation, N/V, weight gain, hair loss, tremor, thrombocytopenia (check for bruising)
Uses of valproic acid outside of epilepsy
migraine prophylaxis, bipolar disorder
AED that has saturable absorption
Gabapentin
Toxicities with gabapentin
fatigue, dizziness, ataxia
Uses of gabapentin outside of epilepsy
post-herpetic neuralgia, diabetic peripheral neuropathy, restless leg syndrome
Toxicities with pregabalin
dizziness, ataxia, weight gain
Uses of pregabalin outside of epilepsy
post-herpetic neuralgia, diabetic peripheral neuropathy, firomyalgia, anxiety (off-label)
Toxicities with levetiracetam
somnolence, dizziness, behavioral changes
Toxicities in ezogabine
dizziness, fatigue, diplopia, ataxia, urinary retention
Black box warning for ezogabine
bluish discoloration of skin and ocular toxicity
Toxicities with perampanel
dizziness, somnolence, irritability, ataxia, weight gain
Black box warning for perampanel
suicidality and homocidality
4 AEDs that are 1st generation
- Phenobarbital
- Phenytoin
- Carbamazepine
- Valproic acid
1st generation AEDs that are enzyme inducers
phenobarbital
phenytoin
carbamazepine
1st generation AED that is an enzyme inhibitor
vaproic acid