What is an acceptable oral vitamin B12 (cobalamin) supplement alternative to intramuscular injections for a patient with severely low vitamin B12 levels, particularly those with malabsorption or pernicious anemia? Vitamin B12 Injections Vitamin B 12 Injectable for Horses, Dogs and Cats Jeffers Recently I have been asked a lot for VitaminB12 injections. I initially decided not to offer vitamin B12 injections as some literature showed that the efficacy of oral vitamin B12 was the Vitamin B12 oral treatment regimens used for maintenance treatment. Download Scientific Diagram