Pharmacology Quiz: Anaemia, Seizures, and Indications of Carbamazepine
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Questions and Answers

What is a potential effect on the fetus when Carbamazepine is taken during pregnancy?

  • Perinatal mortality
  • Intractable hiccups
  • Cleft palate (correct)
  • Neurohypophyseal Diabetes Insipidus
  • Which of the following is a common adverse effect associated with Carbamazepine when plasma levels exceed 8.5mg/L?

  • Anaphylaxis
  • Ataxia (correct)
  • Cholestasis
  • Rickets
  • Why is Phenobarbitone typically used as a second-line treatment for seizures in both adults and children?

  • It has no interactions with other medications
  • Due to its minimal side effects
  • Because it is highly effective in partial seizures
  • Adults find it too sedative, while children experience behavioral disturbances (correct)
  • What is a notable pharmacokinetic characteristic of Sodium Valproate mentioned in the text?

    <p>High brain:plasma ratio</p> Signup and view all the answers

    Which of the following conditions is Carbamazepine NOT contraindicated in?

    <p>Atrial Ventricular abnormalities</p> Signup and view all the answers

    Which statement accurately describes Carbamazepine's pharmacokinetics as outlined in the text?

    <p>Controlled release preparations increase peak plasma concentration</p> Signup and view all the answers

    What is a common indication for Phenytoin usage?

    <p>Status epilepticus</p> Signup and view all the answers

    Which factor can lead to a decrease in Phenytoin protein binding?

    <p>Pregnancy</p> Signup and view all the answers

    What effect does concurrent carbamazepine use have on Phenytoin metabolism?

    <p>It accelerates Phenytoin metabolism</p> Signup and view all the answers

    Which of the following is a potential adverse effect of Phenytoin related to the skin and collagen?

    <p>Gum hypertrophy</p> Signup and view all the answers

    Why is therapeutic drug monitoring crucial for patients on Phenytoin?

    <p>To prevent toxicity due to its narrow therapeutic index</p> Signup and view all the answers

    What type of seizures is Ethosuximide primarily used to treat?

    <p>Generalised seizures</p> Signup and view all the answers

    What is the primary route of excretion for vigabatrin?

    <p>Unchanged excretion via kidneys</p> Signup and view all the answers

    Why does the action of vigabatrin remain prolonged?

    <p>Irreversible binding to transaminase</p> Signup and view all the answers

    Which of the following is NOT listed as an adverse effect of vigabatrin?

    <p>Weight loss</p> Signup and view all the answers

    What effect does oxcarbazepine have on sodium levels?

    <p>Leads to sodium loss</p> Signup and view all the answers

    In which type of seizures is clonazepam indicated for long-term use?

    <p>Myoclonic epilepsy</p> Signup and view all the answers

    What is the recommended first-line agent for status epilepticus?

    <p>Lorazepam intravenously</p> Signup and view all the answers

    Which drug is known for prolonging the inactivated state of Na channels and inhibiting glutamate release?

    <p>Lamotrigine</p> Signup and view all the answers

    Which anticonvulsant can induce the metabolism of carbamazepine and phenytoin?

    <p>Topiramate</p> Signup and view all the answers

    Which anticonvulsant is contraindicated in hepatic or renal impairment?

    <p>Lamotrigine</p> Signup and view all the answers

    Which anticonvulsant has a pharmacokinetic profile with 55% oral absorption and is metabolized in the liver by glucuronidation?

    <p>Lamotrigine</p> Signup and view all the answers

    Which anticonvulsant is known for being reserved for resistant epilepsy due to significant irreversible visual defects?

    <p>Vigabatrin</p> Signup and view all the answers

    Which anticonvulsant can attenuate neuronal excitation by blocking Na channels and enhancing GABA mediated inhibition?

    <p>Topiramate</p> Signup and view all the answers

    Which medication prolongs the inactivated state of voltage-dependent Na⁺ and Ca⁺⁺ channels?

    <p>Carbamazepine</p> Signup and view all the answers

    Which drug enhances the effects of the inhibitory neurotransmitter GABA?

    <p>Ketamine</p> Signup and view all the answers

    Which medication inhibits the effects of the excitatory neurotransmitter Glutamate by modulating NMDA receptors?

    <p>Phenytoin</p> Signup and view all the answers

    What is the mechanism of action of Benzodiazepines like Clonazepam and Diazepam on GABA receptors?

    <p>GABA-A receptor complex activation</p> Signup and view all the answers

    Which drug blocks GABA-A receptor complex activity and is used to prevent seizure spread?

    <p>Phenobarbitone</p> Signup and view all the answers

    What is the main effect of GABA binding to receptor-operated chloride channels in the GABA receptor-channel complex?

    <p>Hyperpolarization and suppression of discharges</p> Signup and view all the answers

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