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antiepileptic medications

Topic: Pathology

Created on Saturday, September 2 2006 by

Last modified on Saturday, September 2 2006.

Which of the following statements regarding antiepileptic medications is FALSE?

 
        A) Clonazepam causes reduction of sodium currents.
 
        B) Phenobarbital is indicated for tonic-clonic.
 
        C) Primidone causes reduction of sodium currents.
 
        D) Clonazepam is approved as adjunct therapy only.
 
        E) Ethosuximide is metabolized primarily in the liver.
 

 


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This question was created on September 02, 2006 by .
This question was last modified on September 02, 2006.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ANSWERS AND EXPLANATIONS




A) Clonazepam causes reduction of sodium currents.

This answer is incorrect.


The statement, "Clonazepam causes reduction of sodium currents." is true.
Clonazepam causes reduction of sodium currents, causes increase of GABA-mediated currents, is indicated for treatment of absence seizures, is indicated for treatment of atypical absence seizures, is indicated for treatment of atonic seizures, is indicated for treatment of myoclonic seizures, is metabolized primarily in the liver, and is a known teratogen, or evidence for its teratogenicity exists.  (See References)

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B) Phenobarbital is indicated for tonic-clonic.

This answer is incorrect.


The statement, "Phenobarbital is indicated for tonic-clonic." is true.
Phenobarbital causes reduction of sodium currents, causes increase of GABA-mediated currents, is a glutamate receptor antagonist, works via an unknown mechanism, is indicated for treatment of partial seizures, is indicated for tonic-clonic, is metabolized primarily in the liver, induces hepatic enzymes, is a known teratogen, or evidence for its teratogenicity exists, is excreted in breast milk, and can be given as a loading dose.  (See References)

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C) Primidone causes reduction of sodium currents.

This answer is incorrect.


The statement, "Primidone causes reduction of sodium currents." is true.
Primidone causes reduction of sodium currents, causes increase of GABA-mediated currents, is a glutamate receptor antagonist, works via an unknown mechanism, is indicated for treatement of complex partial seizures, is indicated for treatment of partial seizures, is indicated for tonic-clonic, induces hepatic enzymes, is a known teratogen, or evidence for its teratogenicity exists, and is excreted in breast milk.  (See References)

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D) Clonazepam is approved as adjunct therapy only.

This answer is correct.


The statement, "Clonazepam is approved as adjunct therapy only." is false.
Clonazepam causes reduction of sodium currents, causes increase of GABA-mediated currents, is indicated for treatment of absence seizures, is indicated for treatment of atypical absence seizures, is indicated for treatment of atonic seizures, is indicated for treatment of myoclonic seizures, is metabolized primarily in the liver, and is a known teratogen, or evidence for its teratogenicity exists.  (See References)

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E) Ethosuximide is metabolized primarily in the liver.

This answer is incorrect.


The statement, "Ethosuximide is metabolized primarily in the liver." is true.
Ethosuximide causes reduction of T-Calcium currents, is indicated for treatment of absence seizures, is metabolized primarily in the liver, induces hepatic enzymes, has leukopenia as a relatively common side effect, has no known significant drug interactions, has no known significant interactions with other AEDs, and is the drug of first choice for patients with absence seizures only.  (See References)

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References:

1. Browne, T.R., & Holmes, G.L. (2004). Handbook of Epilepsy, 3rd Edition. Lippincott Williams & Wilkins, Philadelphia., Leppik, I.E. (2001). Contemporary Diagnosis and Management of the Patient with Epilepsy, 5th Edition. Handbooks in Health Care, Newtown, Pennsylvania.
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pathology
antiepileptic medications
Question ID: 540025025
Question written by . (C) FrontalCortex.com 2006-2009, all rights reserved. Created: 09/02/2006
Modified: 09/02/2006
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