how are vitamin b12 injections administered to self-inject intramuscular - Overview Vitamin B12 Injection Dosage |

CITE: 21CFR184.1945 p

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Dosage table: Horse, Large cattle 1 2 ml per animal Calf, heifer, foal 1 2 ml per animal Sheep, goat 1 2 ml per animal Lamb 0.25 0.5 ml per animal Dog 0.25 0.5 ml per animal Cat 0.25 0.5 ml per animal Or calculate the dose for dogs 50 200 mcg per Kg and cats 50 100 mcg per Kg live weight and re-administer every 1 2 weeks if needed

When symptoms are NOT related to the injection route Here is something worth understanding

European Commission grants marketing authorisation for Darzalex (daratumumab) subcutaneous formulation for all currently approved daratumumab intravenous formulation indications