active b12 injection Vitamin B-12 Injection, 1,000 mcg/mL Rx only Sold in 100 mL Best Vitamin B12 Injection Site:
Description
Do I need a prescription for a B12 injection

There are several reasons to get injections of B12 rather than take sublingual tablets such as: Injections contain 500 times more vitamin B12 than the recommended daily dosage
B12s role in maintaining healthy circadian rhythms may help prevent the sleep disturbances and daytime fatigue commonly experienced with SAD

[DOI] [PubMed] [Google Scholar] 116.Hujoel I.A., Murray J.A

daily for 14 days using a 1-mL syringe and a 23-gauge needle

It can be taken as oral medication or as an injection if necessary