Which symptoms exhibited by a patient taking quinidine indicate toxicity? (Select all that apply.)
a. Headache and lightheadedness
b. Fever and vertigo
c. Tinnitus, nausea, and vomiting
d. Arthralgia
e. Hypoglycemia
ANS: A, B, C
Patients with toxic effects of quinidine (cinchonism) will complain of tinnitus, lightheadedness, headache, fever, vertigo, nausea, vomiting, and dizziness.
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