Iron: Cefdinir; bisphosphonates; carbidopa/levodopa; entacapone; fluoroquinolone; levodopa; levothyroxine; methyldopa; mycophenolate mofetil; penicillamine; and tetracyclines: Iron may reduce absorption of these drugs.
Vitamin B1: Neuromuscular blocking agent (Tubocurarine chloride, Metocurine iodide, Pancuronium bromide and Vecuronium bromide) may be enhanced by high doses of Vitamin B1 although the clinical significance of this is unknown.
Vitamin B-complex: Do not take phenobarbital or phenytoin together with vitamin B-complex. It may reduce the blood level of this drug. Concomitant intake of anticoagulant (e.g. warfarin, aspirin, etc.) may result in enhanced anticoagulant (blood thinning) response.
Folic Acid: Methotrexate and non-steroidal anti-inflammatory drugs (NSAIDs) such as ibuprofen, naproxen, or diclofenac can deplete folic acid consumption.
The patient should tell the doctor about other medicines they are taking including supplements and herbal products.
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