Berocca Performance Drug Interactions

What other medicine or food should be avoided while taking this medicine: see Table 2.

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Food Interaction: Vitamin C: Iron: Vitamin C may enhance iron absorption, especially in individuals with iron deficiency. Small incremental increases of iron could be important in subjects with conditions such as hereditary hemochromatosis or in subjects heterozygous to this condition, as it may exacerbate iron overload.
Calcium, Magnesium, and Zinc: Since oxalic acid (found in spinach and rhubarb) and phytic acid (found in whole cereals) may inhibit calcium, magnesium, and zinc absorption, it is not recommended to take this product within two hours of eating foods containing high oxalic acid and phytic acid concentrations.
Lab Interactions: Vitamin C: Because vitamin C is a strong reducing agent (i.e. electron donor), it can cause chemical interference in laboratory tests that involve oxidation-reduction reactions, such as the analyses of glucose, creatinine, carbamazepine, uric acid, and inorganic phosphates in urine, serum and of occult blood in feces. Using specific tests that are not dependent on reducing properties or discontinuing extra dietary vitamin C will avoid any undesirable interference. Refer to the manufacturer's information to determine if vitamin C interferes with the test.
Vitamin C may interfere with tests that measure urinary and blood glucose resulting in false readings, although it has no effect on blood glucose levels. Refer to the package insert of the meter or testing kit to determine if vitamin C (ascorbic acid) interferes and guidance for accuracy in readings.
Vitamin B1 and Vitamin B6: Urobilinogen: Thiamine and/or pyridoxine can cause a false positive result in the spot test with Ehrlich's reagent.