AEDs Flashcards
If a woman with sz has been off epilepsy meds for a time before getting pregnant and had sz during pregnancy, what are her best options for AEDs:
Phenytoin
Levetiracetam
Percent of major birth defects with LTG plus VPS
12%
Percent of major birth defects with LTG
Less than 3%
Percent of major birth defects with other AEDs
3-4%
Risk of NTDs greatest with
Valproate
In utero exposure to Valproate is associated with what effect to children at age 4 compared to LTG
Lower IQ (by 9 pts)
Most frequent idiosyncratic rxns to AEDs
Rashes
Rashes - most often responsible AEDs
Phenytoin Carbamazepine Phenobarbital Primidone Lamotrigine
High degree of cross reactivity within what AEDs
Phenytoin
Carbamazepine
Phenobarbital
Lamotrigine
Rashes are most often seen in _________ month of use
1st
Rashes are associated with what certain polymorphisms
HLA B*1502
Associated with skin eruptions in Caucasians
HLA A*3101
High fever, rash, lymphadenopathy, pharyngitis, eosinophilia, hepatitis
Systemic hypersensitivity syndrome
After 2 yrs on a single AED during which no sz had occurred,
Rate of relapse: _____ in 2.5 yrs, _____ in 5 yrs after discontinuation
40%
50%
Sz recurrence rate for patients remaining on meds after 2yrs on a single AED and sz-free
20%
First line for myoclinic epilepsy in adolescence
Valproate
Do not coarsen facial features, do not produce gum hypertrophy or breast enlargement
CBZ
Valproate
Rash, fever, lympadenopathy, eosinophilia, other blood dyscrasias, polyarteritis
Idiosyncratic phenytoin hypersensitivity
Prolonged use causes hirsutism, gum hypertrophy, facial feature coarsening, peripheral neuropathy, cerebellar degeneration
Phenytoin
Overdose causes ataxia, diplopia, stupor
Phenytoin
Idiosyncratic SE of phenytoin
Choreoathetosis
Mild leukopenia
CBZ
Rare SE: pancytopenia, hyponatremia (SIADH), DI
CBZ
CBC to be checked regularly
CBZ