A 63-year-old woman with a medical history of type 2 diabetes, atrial fibrillation, hypothyroidism, and hypertension was referred for refractory hypomagnesemia. Her blood pressure was 148/68 mm Hg, heart rate 96/min, and weight 106.4 kg. Medications included liraglutide, metformin, apixaban, sotalol, metoprolol, levothyroxine, venlafaxine, lisinopril, ranitidine, and magnesium oxide (400 mg, 2 times/d). Her prior serum magnesium levels ranged from 1.4 mg/dL to 1.6 mg/dL and a recent hemoglobin A1c level was 10.8%. Following baseline blood testing (Table), the patient collected a 24-hour urine sample after discontinuing magnesium supplements for 24 hours.
Identify all potential conflicts of interest that might be relevant to your comment.
Conflicts of interest comprise financial interests, activities, and relationships within the past 3 years including but not limited to employment, affiliation, grants or funding, consultancies, honoraria or payment, speaker's bureaus, stock ownership or options, expert testimony, royalties, donation of medical equipment, or patents planned, pending, or issued.
Err on the side of full disclosure.
If you have no conflicts of interest, check "No potential conflicts of interest" in the box below. The information will be posted with your response.
Not all submitted comments are published. Please see our commenting policy for details.
Tucker BM, Pirkle JL, Raghavan R. Urinary Magnesium in the Evaluation of Hypomagnesemia. JAMA. 2020;324(22):2320–2321. doi:10.1001/jama.2020.18400
Customize your JAMA Network experience by selecting one or more topics from the list below.
Create a personal account or sign in to: