how many units of b12 should i inject Injection Dose for Adults: Dosage & Frequency B12 Shots Dosage for Adults:

Injection site reactions including erythema, pruritus, or mild indurationoccur in some patients, with frequency varying by product (from low single-digit percentages to over 10%)

Clean the rubber stopper with an alcohol prep pad

J Natl Cancer Inst

It includes 1-5 intramuscular or subcutaneous injections of 1000 mcg crystalline cyanocobalamin daily, followed by oral doses of 1000-2000 mcg/day Parenteral administration should be reserved for those with significant neurological symptoms NICE guideline: Vitamin B 12 deficiency in over 16s: diagnosis and management: Malabsorption as the confirmed or suspected cause of vitamin B 12 deficiency: Offer replacement to people if: lifelong intramuscular vitamin B12 Autoimmune gastritis is the cause They have had a total gastrectomy They have had a complete terminal ileal resection If the person has a vitamin B 12 deficiency because of malabsorption that is not caused by autoimmune gastritis, or a total gastrectomy or complete terminal ileal resection (for example, malabsorption caused by coeliac disease, partial gastrectomy or some forms of bariatric surgery): Offer vitamin B 12 replacement and Consider intramuscular instead of

It is injected subcutaneously (under the skin) of the upper thigh, stomach (abdomen), or upper arm once weekly