Benzyl alcohol is doing its job
Ask a close friend, companion, spouse, or relative to learn how to administer vitamin B12 shots, or at least hold a mirror for you while you give yourself the injection, and rub out the pain afterwards to prevent bruising and other painful side effects
Checking your specific pharmacy documentation, the label, or calling directly is always the most reliable way to know what your specific product should look like
Key conversion: 1 mL = 100 units on every U-100 insulin syringe
Side Effects and How to Manage Them Nausea : Most common
By Alaiyka Parvez Owner, CoLaz Aesthetics Clinic The short version A poorly placed or rushed B12 injection most often causes short-lived pain, bruising or a small lump that settles in a day or two