side effects of b12 injections uk Vitamin Injection Common & Rare Side Effects

Take supplements such as iron, magnesium, zinc, B vitamins, and other vitamins if you do not get enough of these nutrients from dietary sources

Cyanocobalamin Injection, USP is a sterile solution of cyanocobalamin for intramuscular or subcutaneous injection. Each mL contains 1000 mcg cyanocobalamin. Each vial also contains Sodium Chloride, 0.9%. Benzyl Alcohol, 1.5%, is present as a preservative and Water for Injection q.s. Hydrochloric acid and/or sodium hydroxidemay have been added during manufacture to adjust the pH (range 4.5-7.0)

I receive B12 injections one per week for the first month or so

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4% report awareness of increased heart rate

The lethal dose in humans would be approximately 21,000mg for a 70kg person, making the 1-3mg daily doses used in typical protocols extremely safe from a toxicity standpoint