May interfere w/ oral tetracycline antibiotics absorption. Allergic hypersensitivity w/ vit B12
compd. May impair absorption w/ food; compd containing Ca & Mg, including antacids & mineral supplements & bicarbonates, carbonates, oxalates or phosphates. May decrease absorption of cefdinir, bisphosphonates, entacapone, fluoroquinolones, levodopa, methyldopa, mycophenolate mofetil & penicillamine. Reduced levothyroxine efficacy. May decrease absorption w/ Zn salts. May delay response to Fe w/ chloramphenicol. Increased absorption w/ ascorbic & citric acid.