Common, mild side effects: Pain, redness, or itching at the injection site Mild nausea or diarrhea Headache Temporary dizziness Rare but more serious reactions: Allergic reactions (rash, swelling, breathing difficulty) Heart palpitations Low potassium levels during rapid correction of severe deficiency Very rare cases of anaphylaxis requiring emergency care Seek medical attention immediately if you experience symptoms of a serious allergic reaction
In any case, the physician must do a complete diagnostic workup to track down the reason for elevated vitamin B12 levels
Precautions Do not use in patients with a known allergy or previous hypersensitivity reaction to any ingredients, active inflammation of a superficial vein, significant dysfunction of vein valves or deep vein insufficiency, large superficial veins that connect to deeper veins, a history of migratory phlebitis, or an active skin and soft tissue infection, such as cellulitis
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