B12 Injection DRIP AND DIP Dr. prescribed B12 injections. Pharmacy only gave me vials. Where do you get your needles and syringes? What size?? Where do I inject? : r B12_Deficiency Vitamin B12 Injection: Energy Boost and Anemia Treatment Mountainside Medical VITAMIN B12 (Generic) Injectable Solution, 1000 mcg mL, 100 mL vial Easy Refills Chewy Rx Hello, my cat got recommended 0.5 ml of B12 every week. He got 5 shots already. At the moment he's eating less and less. Is the amount ok in your experience? I Vitamin B 12 Injection for Animals, 3000 mcg mL, 100 mL Vial Prescription Medication for Pets