can vitamin b12 injection cause fever Why do I feel worse after a injection? Common & Rare Side Effects

It reduces how much energy comes in by suppressing appetite, slowing digestion, and improving how the body handles the food that does get consumed

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These symptoms can indirectly affect body weight because low energy often reduces appetite and activity

Youll need a lab test to rule out deficiency

Vitamin B12 is an injection administered into the arm

Dosage and Administration (All 3 products): Give 5 - 10 mL by intramuscular injection regularly twice weekly, or as advised by a veterinary surgeon