Organic acids, calcium salts, phosphates, phytin, cholestyramine, as well as antacid preparations containing aluminum, magnesium, calcium, interfere with iron absorption due to the formation of insoluble complexes. Preparations containing pancreatic enzymes can reduce iron absorption.
With the simultaneous use of phenobarbital, carbamazepine, valproate, sulfasalazine, hormonal contraceptives, antagonists of folic acid, trimethoprim, pyrimethamine and triamterone, the absorption of folic acid decreases.
Iron salts disrupt absorption in the gastrointestinal tract of antibiotics of the tetracycline group.
Solid food, bread, raw cereals, dairy products, eggs reduce the absorption of iron, with the simultaneous administration of tetracycline with antibiotics, as well as with penicillinamine, complex compounds are formed that reduce the absorption of iron and reduce the antimicrobial activity of antibiotics.