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While a causal relationship has not been established, patients with depression or other psychiatric conditions should be monitored for changes in mood or behavior, particularly during the initial weeks of treatment or following dose adjustments

Confirm current FDA approval and trial status on FDA.gov and ClinicalTrials.gov before relying on this paragraph for planning

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Adverse reactions reported following methylcobalamin administration include headache, infection, nausea/vomiting, paresthesias, and rhinitis

Understanding the true role of this vitamin within the broader context of metabolic health is essential for making informed decisions about supplementation