vitamin b12 injection trade name Compounded Cyanocobalamin (Vitamin B12) Optineuron Injection of Vitamin B

Nat Commun 2017

PMID 8856015

Signs of intramuscular injection include deeper, more intense pain during injection, increased bruising, faster onset of side effects (nausea, headache appearing within hours instead of the typical timeline), and a sore, tender feeling in the thigh muscle for a day or more after injection

Pinch the skin , insert the needle at a 4590 angle , and inject slowly over 35 seconds

Uncommon but notable adverse effects include: Hypokalaemia (low potassium) can occur during initial treatment of severe megaloblastic anaemia, as rapid cell production consumes potassium

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