This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hypeension, Arrhythmias, Dyslipidemia, Subject name: Pharmacology
A patient on lithium therapy is also suffering from hypeension. Which of the following antihypeensive drugs can cause toxicity when given along with lithium to this patient ? 
Select and explain. 
A. Calcium channel blockers, B. Thiazide diuretics, C. Beta blockers, D. Clonidine
B: Thiazide diuretics
Answer: B: Thiazide diuretics 
Explanation: Thiazide diuretics cause decrease sodium concentration in the body initially by acting on the DT, which inturn causes increased reabsorption of sodium as a compensatory feedback, thereby causes decreased excretion of lithium, leading to toxicity. This occurs because lithium and sodium excretion are treated in a similar fashion so increased reuptake of sodium implies that there is decreased excretion of lithium from the body leading to lithium toxicity