standard dose of b12 intramuscular injection Vitamin Monthly Injection: Typical & Schedule Treating Severe Vitamin B12 Deficiency

Certain drugs, such as the diabetes drug metformin may have an impact on B12 absorption, which may require supplementation

With intramuscular (IM) injections the standard treatment for severe deficiency or malabsorption conditions like pernicious anaemiaserum B12 levels rise rapidly, typically reaching therapeutic ranges within 2448 hours after the first injection

However, it may take a few days or weeks before your symptoms start to improve and you feel better

Vitamin B12 is essential for the production of red blood cells, the maintenance of the nervous system, and the synthesis of DNA

The Eight B Vitamins and Their Roles Vitamin B1 (Thiamine) Supports carbohydrate metabolism, nerve conduction, cardiac function, and enteric nervous system signaling

But this choice requires accepting significant uncertainty about efficacy, safety, and optimal dosing