Vit: Concomitant use w/ high dose of Ca- & P-containing compd, drugs w/ same content, NSAIDs, anticoagulants, insulin, HMG-CoA reductase inhibitors, milk & levodopa. Fe sulfate: Concomitant use w/ antacids, chloramphenicol, levodopa, levothyroxine, penicillamine, quinolones, cefdinir, dimercaprol, H
2 receptor antagonists, PPIs, tetracycline, & dairy products. Buclizine HCl: Concomitant use w/ CNS depressants, alcohol, anticholinergics, apomorphine & antihistamine.