title: Calcium carbonate and reduction of levothyroxine efficacy.
authors.forename: C R
authors.initials: CR
authors.lastname: Schneyer
mesh_terms: D002119:Calcium Carbonate / Q000008:administration & dosage / Q000494:pharmacology*; D004334:Drug Administration Schedule; D004347:Drug Interactions; D006801:Humans; D013974:Thyroxine / Q000008:administration & dosage / Q000494:pharmacology*
chemical_list: D002119:Calcium Carbonate; D013974:Thyroxine