b12 injection subcut or im Is Sq Should B12 be given IM or SubQ? Cyanocobalamin (B12) Injection 1000 mcg/mL,

In rare cases, starting high-dose B12 treatments for severe anemia may cause temporary imbalances in potassium levels or an acne-like rash

They occur naturally within the body but can also be synthesized artificially, and they play important roles in many physiological processes such as appetite regulation, hormone production, tissue growth, immune response, and cellular motility

If I were you Id get it checked out

Injecting B12 on top of an undiagnosed cause masks the underlying deficiency picture and can delay diagnosis of pernicious anaemia

Are B12 injections better than tablets

Vitamin B12 in the blood and and globulins transported to body tissues, most of them located in the liver