missed my b12 injection Feeling worse after Injection: Answering concerns Sandoz Vitamin B12 Injectable Solution
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International journal of obesity and related metabolic disorders : journal of the International Association for the Study of Obesity

The first time you get chickenpox, the virus remains in your nerve endings even after the chickenpox is gone

Arendt JFB et al

[3] For confirmed deficiency with neurological involvement: 1 mg IM on alternate days until no further improvement, then 1 mg every two months urgent initiation is essential to prevent irreversible nerve damage