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48 Cards in this Set
- Front
- Back
what are the excitatory neurotransmitters?
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acetylcholine, norephiephrine, histamine, corticotropin releasing factor, glutamate (NMDA receptor)
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what are the inhibitory neurotransmitters
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GABA, dopamine
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what is the patho of seizures
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change in membrane fcn, decreased inhibition (excess neuronal firing), increased excitement (mediated by glutamate at the NDMA receptor), alterations in extracellualr ion concentration
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what are some mechanical causes of seizures?
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trauma, birth injury, neoplasm
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what are some metabolic causes of seizures?
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electrolyte imbalance(sodium), dehydration, hypoglycemia
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what are some drug withdrawal causes of seizures?
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etoh, benzos, barbiturates, antiepileptics
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what are some drug administration causes of seizures?
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clozapine, clomipromine, theophylline
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what toxins can cause seizures?
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fever, infections
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what are partial seizures
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local or focal affecting 1 hemisphere of the brain
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what are simple partial seizures?
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no impairment of consciousness; motor, visual, auditory, olfactory, sweating, flushing pallor, gagging
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what are complex partial seizures?
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impairment of consciousness; aura; olfactory, visual, auditory); behavior includes picking at clothes, lip smacking, repetitive phrases, running
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what are the characteristics of tonic-clonic seizures?
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grand mal, preceded by and aura, muscle rigidity (tonic), rhythmic jerking (clonic), 30 sec-3 min, loss of bowel/bladder, cry out, bite tongue, post ictus=confusion and lethargy
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what are the characteristics of absence seizures?
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petit mal, sudden interruption of ongoing activities, blank stare, EEG shows 2-4 cycles/spike
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what are the characteristics of atonic seizures?
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akinetic, loss of muscle tone, falling to floor, drop attacks
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What are the characteristics of myoclonic seizures?
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brief, shock-like muscle contractions of face/trunk/extremities
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what are the characteristics of status epilepticus?
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emergency, >30 min, 2 or more without full consciousness in between
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how is status epilepticus treated?
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diazepam iv and repeat after 5-10 min if not stop, lorazepam iv, repeat after 5-10 min if not stop, fosphenytoin or phenobarbital given for prolonged control of seizure
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what med is given for intractable staus epilepticus?
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barbiturates
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what are some non-pharm treatments of seizures?
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ketogenic diet(high fat, low carb/protein)
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what are some s/e's of a ketogenic diet
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diarrhea, increased lipids, protein deficiency, hypoglycemia
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when to start of AED's
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2 or more seizures, impacts life
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when to stop AED's
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seizure free for 2-5 yrs, EEG normalized, normal neuro exam/IQ
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adverse effects of carbamazepine Tegretol
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diplopia, nausea, drowsiness, sedation
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adverse effects of ethosuximide (zarontin)
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nausea, leukopenia
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adverse effects of felbamate (felbatol)
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aplastic anemia, hepatic failure
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adverse effects of gabapentin (neurontin)
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drowsiness, sedation, weight gain
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adverse effects of lamotrigine (lamictal)
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insomnia, ataxia, rash, ha
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adverse effects of levetiracetam (keppra)
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somnolene, dizziness, rash, ha
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adverse effects of oxcarbazepine (trileptal)
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somnolence, dizziness, diplopia
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adverse effects of phenobarbital
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sedation, drowsiness, ataxia
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adverse rxns of phenytoin (dilantin)
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sedation, gingival hyperplasia
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adverse rxns of tiagabine (gabitril)
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dizziness, somnolence, irritabiltiy
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adverse rxns of topiramate (topamax)
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slowed thinking, weight loss
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adverse rxns with valproate (depakote)
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tremor, drowsiness, hepatotoxicity
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adverse rxns with zonisamide (zonegran)
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somnolence, rash, psychosis
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drug of choice for partial seizures (simple and complex)
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phenytoin, carbamazepine, valproate
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drug of choice for gerneralized tonic-clonic seizures
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phenytoin, valproate
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drug of choice for absence seizures
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valproate, ethosuximide
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drug of choice for myoclonic seizures
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valproate
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drug of choice for atonic seizures
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valproate
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what is the safest way to reduce teratogenicity in pregnant women taking seizure medication?
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monotherapy (tiagabine is safest) but most are category C
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safety concern with carbamazepine
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hyponatremia
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safety concern with lamotrigine
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steven johnson's syndrome
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safety concern with felbamate
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liver tox, bone marrow suppression
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safety concern with phenytoin
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gingival hyperplasia
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safety concern with topiramate
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language dysfunction, behavioral changes secondary to cognitive effects
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when is phenytoin indicated vs fosphenytoin
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for complex partial seizures, generalized tonic clonic seizures and neuropathic pain
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characteristics of phenytoin
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highly variable, 90-95% protein bound, saturable oxidative process, half life 7-42 hrs, cbc with diff then q 6-12 months after, albumin, lfts, and calcium levels
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