Rare side effects of B12 shots (require medical attention) Serious reactions to B-12 shots are uncommon, but its important to be aware of them: Allergic reaction, including rash, hives, dizziness, or trouble breathing Significant swelling, pain, or warmth that worsens at the injection site Palpitations or chest discomfort Signs of drug interactions, especially if you take multiple prescription medications If you experience symptoms that feel intense, progressive, or unusual, you should contact your provider right away
OTC Vitamin B12 Options Prescription vitamin B12 injections and over-the-counter oral supplements are two ways to treat B12 deficiency
B12 shots can be both subcutaneous and intramuscular
Rickes 1948 Rickes EL, Brink NG, Koniuszy FR, Wood TR, Folkers K
Your prescriber will provide guidance on how it should be used
We treat symptoms like shortness of breath, rapid heart palpitations, or faintness related directly to B12-deficiency (pernicious) anaemia
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