Antiepileptic drugs Flashcards
Difference between seizures, convulsion and epilepsy
- Seizures: Brief episode of electricity in the nerves of the brain which may or may not cause convulsions
- Convulsions: Involuntary contractions(spasms)
- Epilepsy: Chronic, recurrent pattern of seizures
Primary epilepsy
Idiopathic roughly 50% of cases
Secondary Epilepsy
Symptomatic of a distinct cause (trauma, infection,cerbrovascular disorder)
Classification of epilepsy
Generalized, Focal onset seizures and unclassified seizures
Generalized seizures
- Both hemispheres, tonic (stiffening)-clonic(jerking) seizures and atonic (weaking of the muscles
3 phases of a seizure
- prodrone
- ictal
- post ictal
Focal onset seizure
Occurs when people are awake and orientated
What status epilepticus
Seizure that last 5 min or longer causing a hypotension, hypoxia, brain damage, and possibly death
T or F Status epilepticus is not a medical emergency
F it is a medical emergency
Treatment of status epilepticus
Diazepam is choice for immediate treatment
Which drugs are good with seizure control and toxicity
- Serum concentrations of phenytoin, phenobarbital, carbamazepine, and primidone correlate better with seizure control and toxicity
Which drugs are bad with seizure control and toxicity
Valproic acid, ethosuximide and clonazepam
Antiepileptic drugs traditionally used to manage seizure disorder
Barbiturates
Hydantoins
Iminostilbenes plus valproic acid
Second- and third-generation antiepileptics
Indications of antiepileptic
- Prevention or control of seizure activity
- Long-term maintenance therapy for chronic, recurring seizures
- Acute treatment of convulsions and status epilepticus
MOA of antiepileptic
decrease nerve impulses or increases GABA
Pharmacological effects
Reduce nerves ability to be stimulated, suppress transmission of impulse, decrease speed of impulse
Adverse effects of phenytoin (long term)
May cause hyperplasia, acne, hirsutism, and Dilantin facies.
Contraindication of antiepileptic drugs
Drug allergy, pregnancy
Contraindications of dilantin
Spinal malformation such as spina bifida