Sandoz Vitamin B12 Injectable Solution 1000 mcg 10 mL Vitamin B12 Lets pinch subcutaneous injection sites! When I said heparin and enoxaparin are exclusively used in the abdomen, I dont mean other meds cant go there. We just generally put anticoagulants in the Instruction Guide for Intramuscular (IM) Self injection of B12 Methylcobalamin 1mg 5mg CYANOCOBALAMIN INJECTION, USP 10,000mcg 10mL (1,000mcg mL) 10mL VIAL On The Go B12 Injection at enTrust Urgent Care Center Clinic