Ca: May reduce absorption of bisphosphonates (eg, alendronate, etidronate, risedronate), quinolones (eg, ciprofloxacin, norfloxacin, levofloxacin, ofloxacin) & tetracyclines. Decreased absorption w/ other products containing Ca & foods rich in oxalic acid (eg, spinach, sweet potatoes & beans) & phytic acid (unleavened bread, raw beans, seeds, nuts, & grains). Vit D: Concomitant intake of other products containing high dose vit D may result in excessive doses of vit D. May reduce absorption w/ mineral oils, olestra, orlistat & bile acid sequestrants (eg, cholestyramine, colestipol). May decrease effect w/ anticonvulsants, cimetidine & thiazide.
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