Severe hyponatremia secondary to preparation for colonoscopy with sodium picosulfate/magnesium citrate.

The number of colonoscopies performed in Spain has been progressively increasing in recent years with the program of early detection of colon cancer. The preparation for this test is the key to greater profitability and the choice of the solution to be administered, decisive. The adverse effects that we can observe; usually are mild, but they can entail other more serious ones, like electrolytic imbalances as we present in this case.