can you take too much b12 injections How Quickly Does a Shot Work? Benefits & What to Expect Vitamin B12 Injections: What You

For people with healthy digestive systems, high-dose oral B12 supplements can be effective for a mild deficiency

Consult Your Healthcare Provider If you experience excessive tiredness or nerve problems, your healthcare provider can do a blood test to check vitamin B12 levels and also rule out other potential causes for your symptoms

If you are severely deficient in vitamin B12, you might be recommended B12 shots every other day for about two weeks to replenish your B12 stores and correct symptoms

have ever had an allergic reaction to hydroxocobalamin or any other medicine

Deficiency in vitamin B12 may cause anemia, fatigue, muscle weakness, intestinal problems, nerve damage, and mood disturbances