vitamin b12 injection syringe size How to self-inject intramuscular - Overview what size needle do i

Form : Supplied as 5mg lyophilized powder in a 3mL sterile vial

Vitamin B12 can interact with medications such as colchicine (a medicine used to treat gout), metformin (an anti-diabetic agent), excessive alcohol, vitamin C products, extended release potassium products, antibiotics such as gentamicin, neomycin, tobramycin, anti-seizure medications such as phenobarbital, phenytoin, primidone, medicines used to treat heartburn like H2 blockers such as cimetidine and proton pump inhibitors such as omeprazole, antacids such as ranitidine, cimetidine

The authors also noted that further optimisation was needed, including work relating to high clearance in mice and off-target activity against monoamine oxidase A

Consistency matters more than specific timing, so choose whatever schedule you can maintain reliably