What is the rationale for administering levodopa instead of ...

[pane00]

What is the rationale for administering levodopa instead of dopamine for treatment of Parkinson's disease?
 
  a. Dopamine does not cross the bloodbrain barrier when administered orally.
  b. Levodopa is much less expensive.
  c. The half-life of dopamine is too short.
  d. Dopamine has too many reactions with other medications.

Question 2

When a patient taking a monoamine oxidase B inhibitor receives his dietary tray, the nurse knows to remove the
 
  a. cheese.
  b. eggs.
  c. bread.
  d. coffee.

[cam1229]

Answer to Question 1

ANS: A
When administered orally, dopamine does not enter the brain. Levodopa does cross into the brain and is metabolized into dopamine. Dopamine is not available as an oral medication. The half-life of levodopa is approximately 50 minutes; the half-life of dopamine is approximately 4 days. Dopamine does not react with medications.

Answer to Question 2

ANS: A
Patients taking monoamine oxidase B inhibitors should avoid food and beverages with a high tyramine content, such as cheeses. Eggs, bread, and coffee do not have a high tyramine content.

[pane00]

Both answers were spot on, thank you once again

[cam1229]

Great! Please up vote