can b12 injections interfere with your inr test Warfarin and Nutrients: Evidence-Based Interactions Guide Vitamin B12 Deficiency Explained -

Because rare instances of anaphylactoid reactions have occurred in patients receiving parenteral corticosteroid therapy, appropriate precautionary measures should be taken prior to administration, especially when the patient has a history of allergy to any drug

Low platelet count due to impaired production is generally due to problems with the bone marrow

If you have a history of B12 deficiency, malabsorption issues, or are vegetarian/vegan with marginal B12 status, the weekly B12 injection provides protection during the high-risk period of rapid weight loss

Fetal heart rate should always be monitored during paracervical anesthesia

J Headache Pain