Important safety information

Methylcobalamin B12

Safety Information

Injectable methylcobalamin B12 is generally well tolerated. Rare effects may include headache, mild gastrointestinal upset, or tingling sensations, particularly if dosing differs from clinician guidance.

Common Side Effects

• Redness, tenderness, or soreness at the injection site
• Mild flushing
• Dizziness
• Fatigue
• Headache

Rotate injection sites and follow technique instructions supplied by your prescriber and pharmacy.

Precautions

• Avoid use if pregnant, nursing, or planning pregnancy or breastfeeding unless specifically directed by your provider.
• Stop and seek urgent care for rash with breathing difficulty, lip or tongue swelling, or rapid heartbeat after injection.
• Discuss polycythemia, cobalt sensitivity, active malignancy, or concurrent folate replacement plans with your clinician.

Drug interactions

Fully disclose prescriptions, OTC drugs, nicotine, hormonal therapies, oncology agents, proton pump inhibitors or metformin when relevant for absorption labs, antimicrobials, and herbal products.

Storage

• Follow pharmacy labeling for temperature and stability
• Do not reuse needles
• Keep out of reach of children

Note: Oat Meds helps connect patients with telehealth providers; medication is dispensed by licensed pharmacies. The statements above have not been reviewed by the Food and Drug Administration. Compounded methylcobalamin may be prescribed off-label. These products are not intended to diagnose, treat, cure, or prevent any condition.