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[6] Patients with a history of severe allergic reactions to similar injectable vitamins should not receive this product, or should undergo desensitization under close medical supervision if the therapy is deemed essential

However, neurological symptoms like numbness or tingling can take weeks or even months to improve as nerves slowly heal

Kumar Surendra A tingling sensation on the fingertips, tiredness, weakness, and dizziness are more than just stress, they could be signs of a deficiency you may be overlooking

These side effects can worsen existing anxiety disorders and disrupt sleep patterns

If you suspect that an intramuscular injection was administered incorrectly, taking prompt action can help minimize complications and prevent long-term damage

Other symptoms of B12 deficiency, such as numbness and tingling in the hands and feet, are also common in people with diabetes and spinal stenosis