Baking soda pica: a case of hypokalemic metabolic alkalosis and rhabdomyolysis in pregnancy

Abstract

Background: We report a case of baking soda pica in a woman at 31 weeks of pregnancy causing severe hypokalemic metabolic alkalosis and rhabdomyolysis.

Case: A multigravida at 31 weeks of gestation presented with weakness and muscle pain. She was found to have severe hypokalemic metabolic alkalosis and rhabdomyolysis, with elevation in serum transaminases and hypertension. We initially thought the patient had an atypical presentation of preeclampsia until it was realized that she was ingesting 1 full box of baking soda (454 g sodium bicarbonate) per day. Symptoms and abnormal laboratory findings resolved with discontinuation of the patient's pica practices.

Conclusion: Pica is a common but often overlooked practice that can potentially lead to life-threatening disorders. A thorough evaluation of a patient's dietary intake is extremely important, especially in the setting of atypical presentations of disease in pregnancy.