b12 injections im or subq Is Injection Sq Should B12 be given IM or SubQ? Compounded Hydroxocobalamin (Vitamin B12) Injection

(PubMed) Milner AD, Rao H, Greenough A

Such episodes were reported in 4.1%, 7.3%, and 5.7% in the placebo, 25 mg and 50 mg methylcobalamin groups, respectively

Possible adverse effects may include: Injection site reactions : Redness, swelling, irritation, or discomfort Gastrointestinal symptoms : Nausea, vomiting, stomach cramps, or diarrhea Headaches or dizziness Allergic reactions : Rash, itching, shortness of breath, or facial swelling (rare) Increased heart rate or anxiety (typically temporary from B-vitamins) Fatigue or weakness if used improperly Elevated liver enzymes when taken in excess particularly with methionine or choline Insomnia if taken late in the day due to increased energy levels Who should avoid or use caution

As a result, you may feel more active and burn more calories

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The two most common forms are cyanocobalamin and methylcobalamin