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Description
In rare cases, particularly with severe megaloblastic anaemia, rapid correction of B12 deficiency can affect potassium distribution in the body
But, I understand

In 2026, Medicare will pay between $13 and $18 per administration

The most common side effects are mild injection-site reactions and occasional transient headaches, both usually resolving quickly

As a simple definition, methylmalonic acid (MMA) is a toxic metabolite
The theoretical concern is off-target methylation interference, since NNMT isnt the only methyltransferase in one-carbon metabolism pathways
