Hydroxocobalamin 1000 mcg/mL injection is a highly effective prescription medication used to treat and prevent severe Vitamin B12 deficiency. This pack contains 5 single-dose 1mL ampoules or vials, with each millilitre delivering a concentrated 1000 mcg dose of hydroxocobalamin, a natural and long-lasting form of Vitamin B12.
Because it is administered as an injection, it bypasses the digestive tract completely. This makes it the gold-standard treatment for individuals who cannot absorb the vitamin through food or oral supplements.
Primary Uses
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Pernicious Anemia: Treats Addisonian pernicious anemia, an autoimmune condition where the stomach fails to produce intrinsic factor, making B12 absorption impossible.
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Malabsorption Syndromes: Helps individuals with Crohn’s disease, celiac disease, or those who have undergone gastric surgery.
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Dietary Deficiencies: Resolves severe depletion often seen with strict long-term vegan or vegetarian diets.
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Neurological Support: Corrects nerve-related symptoms of deficiency, such as tingling, numbness, and cognitive fatigue.
Administration & Dosage
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Route: This medication must be given intramuscularly (IM)—injected directly into a muscle (usually the buttock, thigh, or upper arm). It should not be given intravenously (IV).
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Initial Dose: Typically involves frequent loading doses (e.g., 1 mg every other day for 1–2 weeks) to rapidly build up the body's depleted stores.
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Maintenance Dose: Once stores are replenished, the frequency is usually reduced to a maintenance injection of 1 mg every 2 to 3 months. For chronic conditions like pernicious anemia, this treatment is required for life.
What to Expect & Safety Notes
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Common Side Effects: Mild diarrhea, nausea, headache, dizziness, hot flushes, or localized pain, redness, and itching at the injection site.
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Color Change: Do not be alarmed if your urine takes on a pink or reddish hue; this is a completely harmless effect of the body flushing out excess, unabsorbed B12.
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Monitoring: Your doctor will likely order routine blood tests to track your B12 levels, red blood cell counts, and potassium levels, as potassium can drop temporarily when the body rapidly begins producing new red blood cells.
