All of the following penetrate the CSF except________________?
Correct answer: D. Dopamine
- A. Dextrose
- B. Dilantine
- C. Diazepam
- D. Dopamine
Explanation
Dopamine is polar and does not cross the blood-brain barrier, which is why it cannot directly produce central dopaminergic effects. Dextrose, phenytoin, and diazepam can enter cerebrospinal fluid to clinically relevant degrees.
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