Antacids of this type are known to decrease the absorption of concomitantly administered drugs due to absorption or delaying of gastric emptying or alkalinisation of gastric juice. However the activity of cardiac glycosides such as digoxin may be increased due to the presence of calcium.
Calcium may reduce the absorption of tetracyclines, eltrombopag, bisphosphonates, fluoride, oral iron, zinc, levothyroxine and some fluoroquinolones.
Thiazide diuretics may reduce urinary calcium excretion and cause hypercalcaemia. Vitamin D increases the gastrointestinal absorption of calcium and can cause hypercalcaemia. Plasma-calcium concentrations should be monitored in patients receiving calcium together with thiazide diuretics or Vitamin D.
Antacids may damage enteric coatings designed to prevent dissolution in the stomach.
Interactions may be minimised by ensuring that Setlers Antacid Chewable Tablets Peppermint Flavour are not taken at the same time as, nor within three hours of other medications.