Fe: Reduced absorption of cefdinir; bisphosphonates; carbidopa/levodopa; entacapone; fluoroquinolone; levodopa; levothyroxine; methyldopa; mycophenolate mofetil; penicillamine; tetracyclines. Vit B
1: Enhanced effect of neuromuscular blocking agents (eg, tubocurarine Cl, metocurine iodide, pancuronium Br & vecuronium Br) w/ high doses of vit B
1. Vit B-complex: Reduced blood levels of phenobarb & phenytoin. Enhanced anticoagulant response of anticoagulants (eg, warfarin, aspirin). Folic acid: Depleted consumption w/ MTX & NSAIDs (eg, ibuprofen, naproxen, diclofenac).