Which of the following symptoms is classified as a mild lithium toxicity:
A. Confusion and ataxia
B. Muscle fasciculations and oliguria
C. Tinnitus and blurred vision
D. Apathy and Lethargy
Correct Answer: D. Apathy and Lethargy
Mild toxicity has a lithium serum level of 1.5 mEq/L. Symptoms include apathy, lethargy, coarse hand tremors, and slight muscle weakness.
Options A and C: These symptoms are classified under moderate lithium toxicity.
Option B: Muscle fasciculations and oliguria is classified under severe lithium toxicity.