epilepsy Flashcards
AED of choice in pregnancy
Lamotrigine
AED associated with weight loss
Topiramate
AED that is neither an enzyme inducer or inhibitor and therefore does not have many drug-drug interactions
Gabapentin
Gene associated with GEFS
SCN1A
Rasmussens syndrome/Encephalitis
- Progressive unilateral hemispheric atrophy
- Focal cortical atrophy
- Treat with hemispherectomy
- Antibodies to GluR3 subunit of gluatamate receptor (AMPA)
- Perivascular cuffs and lymhpocytes + monocytes, glial nodules –> spongy tissue degenration
AEDs that can be used in myoclonic epilepsy
- Valproic acid (first line)
- Keppra
- Topiramate
- Zonisamide
AED that is a hepatic enzyme inhibitor
Valproic acid
Benign EEG patterns
- Small sharp spikes
- 6 Hz spike and wave
- Wicket spikes
- 14 and 6 positive spies
Adult EEG frequencies
Beta >13 Hz
Alpha: 8-13 Hz
Delta: 4-7 Hz
Theta <4 Hz
AEDs that aggrevate absence seizures
- Phenytoin
- Carbamazepine
- Gabapentin
- Lamotrigine
AEDs that interact with OCP (cause OCP failure)
- Phenytoin
- Carbamazepine and oxcarb
- Phenobarbital
- Topiramate > 200 mg/d
JME
- Onset 8-24 years of age
- Hx of myoclonic seizures/feeling clumsy on awakening
- 4-6 Hz polyspike and wave
- Valproc acid first line
Benign rolandic epilspy with centrotemporal spikes
- Onset 2-13 years
- Self resolving
- Nocturnal seizures
- Carbamazepine first line (if needed)
Infantile spasms
- EEG with hypsarrythmia (chaotic appearing EEG)
- ACTH first line
West syndrome
Triad of infantile spasms, hypsarrythmia, psychomotor arrest
AED that has zero order kinetics
Phenytoin. Metabolized in liver
Formula for determining IV bolus for AED
(Target total level- current total level) x (body weight in kg x volume of distribution of AED)
Side effects of valproic acid
- Hepatitis/pancreatitis
- Weight gain
- Hair thinning
- PCOS
- Acne
- Tremor
- Thrombocytopenia
Side effects of carbamazepine
- Dizziness, vertigo
- Fatigue, drowsiness
- Diplopia, nystagmus
- HA, N, V
- Hyponatremia
- Ataxia
- Rash, steven-johnsons syndrome
- Aplastic anemia
AED that induces its own metabolism
Carbamazepine
Active metabolite of carbemazapine responsible for its side effects
10, 11 carbamazepine epoxide