Vitamin B12 is safe for most people when taken by mouth or when the injectable product is used correctly. Overall, B-12 is a great choice to boost one’s energy, attitude and health.
There are quite a few side effects that patients may experience from injections of vitamin B12. The more common side effects include: mild diarrhea; upset stomach; nausea; a feeling of pain and a warm sensation at the site of the injection; a feeling, or a sense, of being swollen over the entire body; Headaches; and Joint pain. If any of these side effects become severe or troublesome, make your doctor aware. I personally have been taking injectable B12 for over a month and have none of these side effects or the one’s listed below. I also have many colleagues that take B12 injections and also have no problems with side effects. But it is important to make the that you as the consumer know of all possibilities.
Vitamin B12 injections can result in serious side effects. Although this is a relatively rare occurrence, anyone taking vitamin B12 injections should be aware of the possibility. Call your doctor immediately if you experience any of the following side effects; a rapid heartbeat; heart palpitations; chest pain; a feeling of tightness in the chest; rapid weight gain; muscle weakness; muscle pain; muscle cramps; a feeling of extreme thirst; frequent urination; leg pain; a sense of confusion; numbness; dizziness; a tingling sensation; difficulty breathing; difficulty swallowing; shortness of breath with mild exertion or when lying down; unusual coughing; unusual wheezing; a feeling of extreme tiredness or fatigue; swelling of the extremities including hands, arms, lower legs, feet or ankles; redness, pain or a feeling of warmth in one leg; tenderness or swelling in one leg; a red skin color on the face; a red skin color anywhere on the body; hives; itching and any kind of a skin rash. Again, if any of these side effects become severe or troublesome, make your doctor aware immediately.
So, as it mentions above B-12 injection side effects are very rare but it is good to know all the information pertaining to what you are putting in your body. I know for me, I have been happier, healthier and stronger due to injecting B12 two times per week. I would never go back. However, it is you decision to weight the pros and cons.