b12 injection red color can injections affect your period What is Vitamin B12 Injection? Dr. Scott Denny Seeing Red: Do B12 Injections

Typically, people with a diagnosed B12 deficiency might receive injections every few weeks or months to maintain healthy B12 levels

Seek urgent same-day assessment or call 999 for emergency care if experiencing: Severe chest pain Severe shortness of breath Fainting or collapse Acute or rapidly worsening neurological deficits (such as new limb weakness, sudden gait disturbance, or bladder/bowel dysfunction) Persistent or worsening anaemia symptoms despite treatmentincluding breathlessness, chest discomfort, palpitations, or extreme fatigueshould trigger medical review

Some of the side effects may be uncommon yet severe

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