Seizures Flashcards
IV phen admin instructions
- DO not exceed 50 mg/min
- Monitoring same as fos, BP, respiratory function, ECG
- Requires filter
- Dilute in NS, stable for 4 hours
Patient counseling for all AEDs?
- All can cause suicidal thoughts
- Dont stop taking this medication
Warnings for topamax? 7
- Gap: Met acidosis
- Oligohidrosis
- reduced perspiration
- Nephrolithiasis
- Angle closure glaucoma
- hyperammonemia
- Fetal harm
How is Diastat dispensed?
Must be dialed to dose and locked before dispensing
Once locked the green band should say ready
Boxed warning for Tegretol? 4
`SJS/TEN
- Asian decent should be tested for HLA-B1502
- Aplastic anemia
- agranulocytosis
Phenobarbital and Primidone (prodrug of pheno) SEs, 5
- Sedation
- Dependence
- tolerance
- risk of overdose
- enzme inducer
What to do during initial phase of SE? 5-20 minutes 5 things
- If seizure continues
- Give IV BZD, IV lorazepam
- Alt if IV not available
- IM Midazolam
- Rectal diazepam (Diastat)
What drugs come in easy to swallow formulations for children 2
Lamotrigine and Levetiracetam
What can topiramate and zonisamide cause in children?
Reduce or lack of sweating
Women of child bearing age on AEDs should get?
Daily folate sup
Warnings for gabapentin?
Peripheral edema
Valproic acid MOA?
Increase GABA
Lamotrigine drug interaction 1 specifically
Valproic, increases lam concentrations
Carbamazepine MOA?
Na channel blocker
Therapeutic range for tegretol?
4-12 mcg/mL
Initial dosing for lamotrigine?
Wks 1 and 2, 25 mg
What drug needs a filter?
Phenyoin
What schedule is Vimpat?
Lacosamide
CV
Tegretol
Carbamazepine
Kepra
Levetiracetam
BZD MOA?`
Increase GABA
WHat is purple glove syndrome?
Extravasation: characterized by edema, pain, and blush color
How is an absence seizure described?
Momentary loss of awareness
Lamotrigine can increase the risk of what?
Serious rash when taken with lamotrigine
Warnings for Phenobarb??
- Habit forming
- Physiological dependence
- Hangover effect
- Tolerance
Phenobarb DI?
Can decrease the effect of hormonal contraceptives
non-hormonal contra rec’d
Ethosuximide MOA?
T-type Ca channel blocker
Note about Trileptal?
Not an autoinducer
Zonisamide and Topirimate SEs? 5
- Wt loss
- Metabolic acidosis
- Nephrolithiasis
- Oligohidrosis
- hyperthermia (in children)
- Bring bottles of water stay hydrated, limit sun
Lamotrigine Black Box
Serious skin reactions, including SJS/TEN
What is ethosuximide used for?
Isolated conditions absence seizures
Warnings fro Trilepta
Oxcarb
- Asian decent HLA 1502 prior of positive dont use
- Hyponatremia
What other risk do AEDs have?
Suicide risk monitor mood
How is a tonic clonic seizure described?
Uncontrolled jerky movements
Vimpat
Lacosamide
Drugs for neuroleptic pain? 2
Pregabalin and gabapentin
AEDs and teratogenicity?
Contraception is required
Enzyme inducing AEDs decrease hormonal contraceptives
IV fosphen admin instructions? 3
- Do not exceed 150 mg PE/min
- Monitor BP, respiratory function and ECG
- Lower risk of purple close
4 SEs of Gabapentin?
- Somnolence
- Peripheral edema
- et gain
- mild euphoria
Boxed warning for Valproic acid? 3
- Hepatotoxicity
- Fetal harm: neuronal tube defects decrease IQ
- Pancreatitis
Trileptal
Oxcarb
IV PO ratio for phenytoin?
1:1
Phenobarb therapeutic range?
20-40 mcg/mL in adults
What do increase lamotrigine levels do?
Increase risk of severe rash
Many AEDs and pregnancy?
Decrease efficacy of hormonal contraceptives
G-tube phen admin insruction?
Enteral feedings tube feeds decrease absorption
Hold feedings 1-2 hours before and after
What are generalized seizures?
Start on both sides
What to do during the stabilization phase? 7 things to do
- Time seizure
- Start EEG
- Check BG if low
- Treat with D25-D50
- Check AED level
- and electrolytes
- May need oxygen
WHen can a kid be tapered off AEDs?
seizure free for 1 -2 years
Drug that is also used for bipolar and migraine prophylaxis?
Valproic acid
What two drugs have the MOA of Na channel blocker?
Carbamazepine
Phen/fos
others do though lamotrigine, phenytoin, fosphenytoin
Monitoring for Trileptal?
Oxcarb
Monitoring Na
Primidone?
Pro drug of phenobarbital
What AEDs have blood levels you can check? 4
- Carb
- Phen
- Phenobarb
- Valproic
What doses does diastat acudial come in? 3
2.5, 10, 20
Key drugs that can lower seizure threshold
High doses and renal impairment increase risk 6
- High doses and renal impair increase risk in
- Carbapenems especially imipenem
- Lithium
- Meperidine
- PCN
- Quinolones
- Theophylline
Contraindication to Carbamazepine?
- Myelosuppression
Status epilepticus tx
What are the phases?
Stabalization phase: 0-5
Initial Tx: 5-20
second treatment phase 20-40
2 main valpro SEs
Alopecia
Wt gain
What AED has the highest teratogenic risk?
Valproic acid
Phenobarb DIs?
Strong inducer of most enzymes
What is a seizuring lasting more than 5 minutes?
Status epilepticus SE
Monitoring for Tegretol?
- CBC: with differential and plats
- Electrolytes especiialy Na
What are patients on AEDs at risk for?
Bone loss
All pt on AEDs should get Calcium and Vit D
Whats the most common test to dx epilepsy?
ECG
Zarontin Warniings 2
SJS/TENs, Blood dyscrrasia
What kinetics does phenytoin follow and what is the corrected equation?
Michalis mentin:
Pheny level/(0.2*alb)+0.1
2 SEs of Valproic acid?
- Hyperammonemia treat with carnitine
- dose related thrombocytopenia
Valproic acid counseling?
Take with food to limit GI upst
What lamictal starter pack should be given to a pt taking valproic acid?
Blue the lower starting dose pack
Valproic acid DI: can increase the levels of what 5 drugs?
Inhibitor of 2C9, weak and substrate of 2C19 and 2E1
- Lamotrigine
- Phenobarb
- phenytoin
- warfarin
- Zidovudine
3 main SEs of Topamax?
- Somnolence
- Wt loss
- Anorexia
Warnings for Kepra 4
- Psychiatric reactions
- Including pscyhotic symptoms, solmonlence, fatigue
How are SEs initially treated?
BZDs
What drug is also used for migraine prophylaxis?
Topamax
Important note about keppra?
No signficant DIs
CrCl<=80 decrease dose
Other drugs that lower seizure threshold? 5
- Clozapine
- Bupropion
- Tramadol
- Varinicline
What happens to AEDs during pregnancy?
AED levels decrease
AEDs enzyme inducers? 6
- Carbamazepine
- Ox carb
- Phenytoin
- Fosphen
- Phenobarb
- Primidone
Felbamate Black box? 2
- Hepactic failure
- Aplastic anemia
Other DI for lamotrigine?
Estrogen containing contraceptives decrease lam efficacy
What is valproic acid?
Enzyme inhibitor not really an issue except for lamotrigine
Diastat Acudial dispensing
Each pack contains?
2 rectal syringes
IV PO rations of keppra?
1:1
Depakene, Depacon
Valproic acid
Interesting note about tegretol?
Inducer and autoinducer decreases concentrations of other drugs and itsef
Monitoring for Valpro
- LFTs: Baseline and frequently in the first 6 months
- Platelet
What to do for secondary tx? 20-40 5 things
- If seizure continues give regular AED option
- IV fosphenytoin
- Valpro
- Levetiracetam
- Or phenobarb if others are unavailable
Lamotrigine formulations? 3
Tablet, Chew, ODT
Zarontin?
Ethosuximide
AEDs decrease abnormal electrical acitivity by what two main things?
Increase gaba
Decrease glutamate
What can a ketogenic diet be used for?
Refractory seizures 4:1 combined fats to protein and carbs
What do all AEDs do?
Cause CNS depression
Warning fro tegretol?
- Hyponatremia (SIADH)
- Fetal harm
What is eslicarbazepine?
Produrg of oxcarb
SEs of Zonisamide
Oligohidrosis, hyperthermia
nephrolithiasis
Phenytoin and Fosphenytoin MOA?
Na channel blocker
Supplements that need to be taken with all AEDs?
- Vit D and Calcium
- Women of child bearing age folate
- Valproic acid possibly carnitine
- Lamotrigine if alopecia consider selenium and zinc
Topamax
Topirmate
What is the therapeutic range for valproic acid?
50-100
Effected by albumin <3.5 use phen calc
Warnings for Phenytoin?
- Extravasation: characterized by edema, pain, and blush color
- Avoid with positive HLAB1502
- Fetal harm
What is epilepsy?
A chronic seiure disorder
Warniings for Vimpat
Prolonged PR interval and increased risk of arrythmias
Boxed warning for phenytoin
- Pheny IV admin rate should not exceed 50mg/min and fosphen IV should not exceed 150 mg PE/min if faster hypotension and cardiac arrhythmias
Main Topamax interaction?
- Weak 2C19 inhibitor and inducer of 3A4
- Can decrease efficacy of non-hormonal contraeptives
- Can decrease INR
Tegretol DIs
Strong inducer of many (1A2, 2C19, 2C8/9, 3A4) and p-glycoprotein
Use of alternative non hormonal contraception recommneded
Therapeutic level for phenytoin
10-20 mcg/mL total
3 common SEs of Carb, Oxcarb, and Exslicarb?
- Hyponatremia
- Rash
- Enzyme INducers
Valpro formulations
- Capsule and syrup depakene
- Depakote: delayed release decrease GI upset
- ER
- Sprinkle: on food
Dilantin, Dilantin Infatab
Phenytoin
Phen 3 DI things
- Strong inducer of several
- Non hormonal contra is recommened
- High protein bound can be displaced with other high protein bound
What occurs more commonly with lamotrigine in children?
Life threatening rash
What are focal seizures?
Start on one side
Vimpat dose changes
CrCl<30
max dose of 300 per day
Diastat?
Rectal Diazepam
Zonisamide contraindications?
Hypersens to sulfonamides
Lamictal starter kits 3 sets to know
When are they used?
- Orange:
- Standard dosing
- Use if no interacting meds
- Blue
- Lower starting
- Use if taking valproic acid
- Green
- Higher starter dose
- Use if taking enzyme inducers
WHat can be given IM?
Midazolam
Vigabatrin (Sabril)
Boxed warning
Permanent vision loss
When should AEDs be stopped?
Not abruptly can cause seizures
Formulations fo Keppra? 3
Tablet
Oral Solution
Injection
What two things need to happen to correct phenytoin levels?
Alb<3.5 g/dL
CrCl >= 10
3 SEs of Pregabalin and Gabapentin
Wt gain, peripheral edema, mild euphoria