injectable b12 1000 mcg Cyanocobalamin (B12) Injection mcg/mL, Multiple Dose Vial 30 mL 12 per dose Contains a sterile vitamin B Cyanocobalamin (B12) Injection 1000 mcg/mL,

Cochrane Database of Systematic Reviews

Most patients feel the energy lift within 24 to 48 hours

Adrian S, Scherzinger A, Sanyal A, Lake JE, Falutz J, Dub MP, Stanley T, Grinspoon S, Mamputu JC, Marsolais C, Brown TT, Erlandson KM

The rest of it contains urea, electrolytes, and other compounds

Reported side effects are generally mild and include temporary gastrointestinal discomfort, headaches during initial use, occasional fatigue as the body adjusts, and rare nausea, especially when taken without food

If you experience any combination of these symptoms, particularly if you have risk factors, it is important to seek medical assessment promptly