vitamin b12 injectable solution CYANOCOBALAMIN INJECTION, USP 30000 mcg/30 mL (1000 mcg/mL) 30 mL VIAL Cyanocobalamin (Vitamin B12) Injection is sold as an FDA approved generic drug Vitamin B12 Injection – Prescription

This dose must sometimes be doubled and recourse to the intramuscular route should be preferred only when patients are not very observant

Nothing in this article should be construed as a recommendation to diagnose, treat, cure, or prevent any disease or medical condition, nor as guidance on prescribing or administering any pharmaceutical compound to any specific patient

[DOI] [PMC free article] [PubMed] [Google Scholar] 107.Obaidat A, Roth M, Hagenbuch B

Recalculate syringe units for the new dose

I agree with Gambit62 that it might be helpful to take another adult with you and with Nackapan that it's worth trying to get an emergency appointment