b12 injections at home instructions How to Self-Inject Vitamin What happens if you inject

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Common side effects are typically mild and transient: Pain, redness, or swelling at the injection site (most frequent) Mild diarrhoea or gastrointestinal upset Headache or dizziness shortly after administration Itching or mild skin reactions Temporary pink/red discolouration of urine These effects usually resolve within 2448 hours without intervention

The vial should be discarded immediately

This is only a brief summary of general information about this medicine

Blood tests may include liver function tests, full blood count, and renal function

Medication Interactions Affecting B12 Absorption Some medicines can make it hard for the body to take in Vitamin B12