Lithium A has a very narrow therapeutic range B completely c

Lithium:

A. has a very narrow therapeutic range.

B. completely crosses into the brain.

C. crosses the blood-brain barrier rapidly.

D. is metabolized in the liver into two active metabolites.

Solution

Answer: A. has a very narrow therapeutic range.

Lithium is potent mood stabilizer but has very narrow therapeutic range because therapeutic dose is very nearer to toxic dose. Therefore, close monitoring is essential when a patient is prescribed with this drug. Lithium cannot cross blood-brain barrier easily