A 40 yo manic depressive is noted to have high serum levels of lithium and profound
hypokalemia. His GP had started him on anti-HTNs. Choose the single most likely cause?
a. Verapamil
b. Amiodarone
c. Ranitidine
d. Lithium
e. Thiazide
answer: E
thiazides/furosemide can cause hypokalemia, plus likely to increase serum lithium levels by diuresis