how to inject b12 shots Vitamin C and Injection Techniques How to Give Yourself a

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

Retrieved June 3, 2026, from DrugBank Online

Do not use Mounjaro if you have Multiple Endocrine Neoplasia syndrome type 2 (MEN 2)

Theres a faint bitter smell, but no flavour once swallowed

If you are a new patient, you will need to have a full initial appointment before B12 injections can be an option