Serum magnesium and proton-pump inhibitors use: a cross-sectional study.

Objective: The aim of this study was to evaluate the association of serum magnesium levels with proton pump inhibitors (PPIs) use and other factors.

Methods: This was a cross-sectional study of 151 patients admitted with acute diseases in the Internal Medicine Division of the Hospital de Clinicas de Porto Alegre, after the exclusion of conditions that are commonly associated with hypomagnesemia: diarrhea; vomiting; chronic alcohol use; severely uncompensated diabetes mellitus; and chronic use of laxatives, diuretics or other drugs causing magnesium deficiency.

Results: All patients had normal serum magnesium levels.

Vitamin B12 in metformin-treated diabetic patients: a cross-sectional study in Brazil.

Objective: The objective of this study was to evaluate the presence of vitamin B12 deficiency and the factors associated with serum vitamin B12 levels in a sample of metformin-treated Brazilian diabetic patients.

Method: Cross-sectional study.

Results: 144 patients were included.