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Injectable vitamin B12, which can treat significant deficiencies, may cause the following common side effects: More serious side effects of vitamin B12 injections can include: irregular heartbeat heart palpitations hives or a skin rash Vitamin B12 can cause very rare but serious allergic reactions, or anaphylaxis

B12 levels in the blood return to normal once all that excess has been urinated

No fluid retention or edema Growth hormone commonly causes water retention, leading to bloating, swelling in extremities, and a puffy appearance

Nerve damage, memory problems, difficulty walking, and serious anaemia can all develop

Sealed Vitamin B12 Injection For Dogs Expires After 18-36 Months Of Manufacturing