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With insurance, coverage varies depending on the reason for your prescription

Those with documented or suspected deficiencies in certain vitamins or nutrients may be candidates for injectable supplementation when oral supplementation is not sufficient or appropriate

Food and Drug Administration (FDA) and applicable state pharmacy boards before initiating or modifying any compounding or dispensing program

The headaches seem to follow a different pattern (from what I remember) and tend to lessen over time - I had problems with headaches when I started using methyl but (nasal rather than injection) but it went away after a week or so