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Interactions may exist, particularly when high doses of the nutrients are used with the following medications: Niacinamide: Carbamazepine: May decrease carbamazepine clearance.
Iron: Cefdinir; bisphosphonates; carbidopa/levodopa; entacapone; fluoroquinolones; levodopa; levothyroxine; methyldopa; mycophenolate mofetil; penicillamine; and tetracyclines: Iron may reduce the absorption of these drugs.
Brewer's Yeast: MAO inhibitors (including phenelzine, tranylcypromine sulfate and pargyline hydrochloride): May cause hypertension.
Tell the doctor about other medicines the patient is taking including supplements and herbal products.
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