These include: Allergic reactions, such as hives or trouble breathing Heart problems in people with heart issues Drug Interactions and Contraindications Vitamin B12 shots can affect how some medicines work or have special warnings
Risks and Side Effects Vitamin B12 is a water-soluble vitamin
Retrieved February 5, 2022
The first step is knowing whether you are deficient at all
Dias S, Paredes S, Ribeiro L
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