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While a single-use preparation with sterile saline might be acceptable, multi-use bottles like nasal sprays require the antimicrobial protection of bacteriostatic water

Bacteriostatic Water for Injection is a pharmaceutical-grade sterile diluent formulated with 0.9% benzyl alcohol as a preservative, enabling safe multiple withdrawals from a single vial without contamination when aseptic technique is maintained

As well as producing red blood cells, vitamin B12 transports oxygen throughout the body

Strong preparation habits support safer research handling across clinical environments

Can vitamin B12 injections be bought over the counter