PMID: 21795440
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
Boosting Energy, Mood, and Metabolism A noticeable benefit many patients experience from vitamin b complex shots is a significant boost in energy
Lift it away from the underlying muscle
When you suffer from a deficiency in b12 or low hemoglobin, you may experience megaloblastic or pernicious anemia, health conditions that can cause you to feel lethargic, weak and even pale in colour