b12 injection how fast does it work Quickly a Work? Timeline and Expectations – Bolt Pharmacy How Quickly Does B12 Shot

Vitamin B12 shot side effects Most people tolerate vitamin B12 injections well, but possible side effects include: Mild: soreness or redness at injection site, mild diarrhea, nausea, headache, itching Rare but serious: allergic reactions (rash, swelling, difficulty breathing), low potassium (hypokalemia), dizziness or heart rate changes Get emergency medical help if you have signs of an allergic reaction to Vitamin B12: hives

The clinician will review your symptoms, medical history, and previous treatments to determine whether the injection is suitable for you

Its important to keep an eye on B12 levels and give the right amount to avoid problems

doi:10.1038/s41598-021-03670-5