Your healthcare provider or pharmacist will give you instructions on how and where to self-administer the injection
Pharmacists may also add in other components, such as vitamin B12, that can change the way the active drug works in the body
(PubMed) Hooshmand B, Mangialasche F, Kalpouzos G, et al
1 2 "Vitamin B12: A review of analytical methods for use in food"
Here are the best vitamin B12 injection sites for each method: Subcutaneous B12 injection sites Usually, the best places to give yourself a B12 shot subcutaneously are the abdomen, thigh, and upper arm, as you can see in this illustration: Although not shown above, the buttock is another good site for B12 shots
Patients receiving long-term therapy with omeprazole or other proton pump inhibitors (PPIs) should be monitored for signs of B12deficiency