Neuropsychiatric Flashcards
First 5 minutes of seizure
ABCs, vitals
Check Blood sugar
Get labs
First phase: 5-20 minutes
Benzos!
if unavailable try phenobarbital, diazepam rectal, nasal/buccal midazolam
Second Therapy phase: 20-40 minutes
no evidence based 1st choice
-Fosphenytoin IV
-Valproic Acid IV
-Levetiracetam IV (Keppra)
Third phase: 40-60 minutes
-Repeat any 2nd line therapy
-anesthetic dose of thiopental, midaz, pentobarbital or propfol
Anticonvulsants uses (approved and unapproved)
Seizures
Neuropathic pain
Mood stabilization
Migraines
Alcohol dependence
Calcium channel blockade
T-type channels located in the thalamus
Example of MOA SV2A drug
Keppra
Sodium Channel Blockers
Carbamazepine (Tegretol, Carbatrol)
Oxcarbazepine (Trileptal)
Eslicarbazepine (Aptiom)
Phenytoin/Fosphenytoin (Dilantin)
Lamotrigine (Lamictal)
Zonisamide (Zonegran)
Lacosamide (Vimpat)
Cenobamate (Xcopri)
What is the treatment of choice for Trigeminal neuralgia?
Carbamazepine (Tegratol)
Things to check when taking Carbamazepine, Oxcarbazepine, and Eslicarbazepine
Check Na+, platelets, and drug reactions!
Carbamazepine PK
CYP3A4 inducer + substrate
-Autoinducer
Common side effects for all seizures meds
dizziness, ataxia, confusion, slowing down of CNS
Advantage of Oxcarbazepine vs Carbamazepine
Created to eliminate the auto-induction of CBZ
Similar side effect profile
Less hyponatremia
Normal Phenytoin level
10-20
Fosphenytoin vs Phenytoin
Fosphenytoin = prodrug for IV administration
-Safer, better tolerated, faster infusion rates
ADRs for Phenytoin/Fosphenytoin
Gingival hyperplasia- long term side effect
Bone marrow hypoplasia
Arrhythmias, cardiovascular depression, hypotension
Ataxia
Nystagmus
Which drug has most approvals for different seizure types?
Phenytoin/Fosphenytoin
Recommended to increase at 50mg increments.
Phenytoin side effects if given during pregnancy
cleft palate, cleft lip, congenital heart disease, slowed growth rate, mental deficiency
Lamotrigine (Lamictal) and Depakote drug reaction
Stevens-Johnson syndrome!!!!!
Lamotrigine (Lamictal advantages
Less CNS toxicity and congenital malformations (has more excitatory symptoms tho)
-Be careful about when they are held and when they are started.
Zonisamide side effect
Renal stones in 1.5% of patients
rarely used
Lacosamide and Cenobamate facts
-Newer meds and VERY SAFE
-low side effect profile
-EXPENSIVE
Lacosamide and Cenobamate side effects
QT shortening, DRESS Rxn (strong rxn eosinophils skin,
CHECK EKGs!
Benzo that withdrawal can be FATAL
Clobazam (Onfi)
Benzos from longest duration of action and lipophilicity
Clobazam (Onfi)
Diazepam (Valium)
Clonazepam (Klonopin)
Lorazepam (Ativan)
Clorazepate (Tranxene)
Triazolam (Halcion)
Oxazepam (Serax)
Alprazolam (Xanax)
Midazolam (Versed)
Temazepam (Restoril)
Chlordiazepoxide (Librium)
Benzo with longest duration of action
Clonazepam (Klonopin)
Vigabatrin major side effect
Risk of PERMANENT vision loss
Gabapentin is more often used for _______ than _______
neuropathy rather than seizure control
Advantages of Gabapentin
-No PK drug interactions
-Very well tolerated
Risks of Gabapentin
gabapentinoids in combo with opiates and severe resp distress
Main use of Pregabalin
Main use in NEUROPATHY, may be used for seizures and anxiety
Pregabalin main ADRs
Difficulty concentrating
Risk for ataxia
Valproic Acid pregnancy risk
In utero exposure- lower IQ in children compared to other anti-epileptics (category D-X)
Valproic Acid ADRs
HYPERAMMONEMIA!
Hepatotoxicity
Thrombocytopenia
LFTs, platelets, Ammonia!