Combinations requiring precautions for use:
Cardiac glycosides
Risk of cardiac dysrhythmia. Clinical surveillance is required and possibly electrocardiographic and plasma calcium monitoring are recommended.
Thiazide diuretics
Thiazide diuretics reduce the renal elimination of calcium. It is recommended that the calcium levels in plasma are monitored regularly.
Tetracyclines, etidronate, fluoride and iron
Calcium may impair the absorption of tetracyclines, etidronate, fluoride and iron. At least three hours should intervene between taking Calceos 500mg/400IU Chewable Tablets and these agents.
Strontium
Calcium may reduce the absorption of strontium. Risk of a 60 to 70% reduction in strontium bioavailability on concomitant administration of calcium-containing products. It is recommended to avoid taking Calceos 500mg/400IU Chewable Tablets immediately before and after taking strontium-containing medications.
Estramustine and Thyroid hormones
Calcium may reduce the absorption of estramustine and levothyroxine. It is recommended that these medicines should be taken at least two hours before or after Calceos 500mg/400IU Chewable Tablets.
Orlistat
Treatment with orlistat may potentially reduce the absorption of Vitamin D.
Food
Possible interaction with food, for example foods containing oxalic acid (e.g. spinach, rhubarb, sorrel, cocoa, tea), phosphate (e.g. ham, sausages, cheese spread) or phytic acid (e.g. pulses, whole cereals, chocolate). These types of foods may reduce the absorption of calcium. It is therefore recommended that meals containing these foods be taken some time (e.g. two hours) before or after ingestion of the product.