Endo Flashcards
1
Q
A 10yo with epilepsy has been having increased seizure frequency and was started on carbamazepine 2 weeks ago. He presents today with headache and lethargy. He was eating and drinking normally until yesterday. He has not had any increased losses. What is his most likely sodium level?
A) 144
B) 119
C) 133
D) 164
A
B. Carbamazepine can cause SIADH which results in water retention, dilution of blood, and therefore hyponatremia.
Other causes of SIADH can be acute illness, brain injury/infection
