I would like to thank eveyone. I appreciate your feedback. I found out the etiology of her problems with her low serum Na, K, and Mg, it turned out the patient is taking orally 3-4 liters of soft drink coke on daily basis. I had a long discussion with the primary physician and with patient’s skilled nurse at home regarding this issue. The patient wasn’t reporting her abuse to coke to her physician or skilled nurse.