MCQs PHARMACOLOGY: Antiseizure drugs

001. The mechanism of action of antiseizure drugs is: a) Enhancement of GABAergic (inhibitory) transmission b) Diminution of excitatory (usually glutamatergic) transmission c) Modification of ionic conductance d) All of the above mechanisms
002. Which of the following antiseizure drugs produces enhancement of GABA-mediated inhibition? a) Ethosuximide b) Carbamazepine c) Phenobarbital d) Lamotrigine
003. Indicate an antiseizure drug, which has an impotent effect on the T-type calcium channels in thalamic neurons? a) Carbamazepin b) Lamotrigine c) Ethosuximide d) Phenytoin
004. Which of the following antiseizure drugs produces a voltage-dependent inactivation of sodium channels? a) Lamotrigine b) Carbamazepin c) Phenytoin d) All of the above
005. Indicate an antiseizure drug, inhibiting central effects of excitatory amino acids: a) Ethosuximide b) Lamotrigine c) Diazepam d) Tiagabine
006. The drug for partial and generalized tonic-clonic seizures is: a) Carbamazepine b) Valproate c) Phenytoin d) All of the above
007. Indicate an anti-absence drug: a) Valproate b) Phenobarbital c) Carbamazepin d) Phenytoin
008. The drug against myoclonic seizures is: a) Primidone b) Carbamazepine c) Clonazepam d) Phenytoin 009. The most effective drug for stopping generalized tonic-clonic status epilepticus in adults is: a) Lamotrigine b) Ethosuximide c) Diazepam d) Zonisamide
010. Select the appropriate consideration for phenytoin: a) It blocks sodium channels b) It binds to an allosteric regulatory site on the GABA-BZ receptor and prolongs the openings of the Cl- channels c) It effects on Ca2+ currents, reducing the low-threshold (T-type) current d) It inhibits GABA-transaminase, which catalyzes the breakdown of GABA
011. Phenytoin is used in the treatment of: a) Petit mal epilepsy b) Grand mal epilepsy c) Myoclonic seizures d) All of the above
012. Dose-related adverse effect caused by phenytoin is: a) Physical and psychological dependence b) Exacerbated grand mal epilepsy c) Gingival hyperplasia d) Extrapyramidal symptoms
013. Granulocytopenia, gastrointestinal irritation, gingival hyperplasia, and facial hirsutism are possible adverse effects of: a) Phenobarbital b) Carbamazepin c) Valproate d) Phenytoin
014. The antiseizure drug, which induces hepatic microsomal enzymes, is: a) Lamotrigine b) Phenytoin c) Valproate d) None of the above
015. The drug of choice for partial seizures is: a) Carbamazepin b) Ethosuximide c) Diazepam d) Lamotrigine 016. The mechanism of action of carbamazepine appears to be similar to that of: a) Benzodiazepines b) Valproate c) Phenytoin d) Ethosuximide
017. Which of the following antiseizure drugs is also effective in treating trigeminal neuralgia? a) Primidone b) Topiramat c) Carbamazepine d) Lamotrigine
018. The most common dose-related adverse effects of carbamazepine are: a) Diplopia, ataxia, and nausea b) Gingival hyperplasia, hirsutism c) Sedation, physical and psychological dependence d) Hemeralopia, myasthenic syndrome
019. Indicate the drug of choice for status epilepticus in infants and children: a) Phenobarbital sodium b) Clonazepam c) Ethosuximide d) Phenytoin
020. Barbiturates are used in the emergency treatment of status epilepticus in infants and children because of: a) They significantly decrease of oxygen utilization by the brain, protecting cerebral edema and ischemia b) Short onset and duration of action c) They do not have effect on sleep architecture d) All of the above
021. Which of the following antiseizure drugs binds to an allosteric regulatory site on the GABA-BZ receptor, increases the duration of the Cl- channels openings: a) Diazepam b) Valproate c) Phenobarbital d) Topiramate
022. Adverse effect caused by phenobarbital is: a) Physical and phychological dependence b) Exacerbated petit mal epilepsy c) Sedation d) All of the above
023. Which of the following antiseizure drugs is a prodrug, metabolized to phenobarbital? a) Phenytoin b) Primidone c) Felbamate d) Vigabatrin
024. Indicate the antiseizure drug, which is a phenyltriazine derivative: a) Phenobarbital b) Clonazepam c) Lamotrigine d) Carbamazepin
025. Lamotrigine can be used in the treatment of: a) Partial seizures b) Absence c) Myoclonic seizures d) All of the above
026. The mechanism of vigabatrin′s action is: a) Direct action on the GABA receptor-chloride channel complex b) Inhibition of GABA aminotransferase c) NMDA receptor blockade via the glycine binding site d) Inhibition of GABA neuronal reuptake from synapses
027. Indicate an irreversible inhibitor of GABA aminotransferase (GABA-T): a) Diazepam b) Phenobarbital c) Vigabatrin d) Felbamate
028. Tiagabine: a) Blocks neuronal and glial reuptake of GABA from synapses b) Inhibits GABA-T, which catalyzed the breakdown of GABA c) Blocks the T-type Ca2+ channels d) Inhibits glutamate transmission at AMPA/kainate receptors
029. The mechanism of both topiramate and felbamate action is: a) Reduction of excitatory glutamatergic neurotransmission b) Inhibition of voltage sensitive Na+ channels c) Potentiation of GABAergic neuronal transmission d) All of the above
030. The drug of choice in the treatment of petit mal (absence seizures) is: a) Phenytoin b) Ethosuximide c) Phenobarbital d) Carbamazepin
031. The dose-related adverse effect of ethosuximide is: a) Gastrointestinal reactions, such as anorexia, pain, nausea and vomiting b) Exacerbated grand mal epilepsy c) Transient lethargy or fatigue d) All of the above 032. Valproate is very effective against: a) Absence seizures b) Myoclonic seizures c) Generalized tonic-clonic seizures d) All of the above
033. The drug of choice in the treatment of myoclonic seizures is: a) Valproate b) Phenobarbital c) Phenytoin d) Felbamate
034. The reason for preferring ethosuximide to valproate for uncomplicated absence seizures is: a) More effective b) Valproate′s idiosyncratic hepatotoxicity c) Greater CNS depressant activity d) All of the above 035. The mechanism of valproate action is: a) Facilitation glutamic acid decarboxylase, the enzyme responsible for GABA synthesis and inhibition of GABA- aminotransferase, the enzyme responsible for the breakdown of GABA (enhance GABA accumulation) b) Inhibition of voltage sensitive Na+ channels c) Inhibition of low threshold (T-type) Ca2+ channels d) All of the above
036. Indicate the antiseizure drug, which is a sulfonamide derivative, blocking Na+ channels and having additional ability to inhibit T-type Ca2+ channels: a) Tiagabine b) Zonisamide c) Ethosuximide
d) Primidone
037. Indicate the antiseizure drug – a benzodiazepine receptor agonist: a) Phenobarbital b) Phenytoin c) Carbamazepine d) Lorazepam
038. Which of the following antiseizure drugs acts directly on the GABA receptor-chloride channel complex? a) Vigabatrin b) Diazepam c) Gabapentin d) Valproate
039. Benzodiazepine΄s uselfulness is limited by: a) Tolerance b) Atropine-like symptoms c) Psychotic episodes d) Myasthenic syndrome
040. A long-acting drug against both absence and myoclonic seizures is: a) Primidone b) Carbamazepine c) Clonazepam d) Phenytoin
041. Which of the following antiseizure drugs may produce teratogenicity? a) Phenytoin b) Valproate c) Topiramate d) All of the above
042. The most dangerous effect of antiseizure drugs after large overdoses is: a) Respiratory depression b) Gastrointestinal irritation c) Alopecia d)