However, you should: Call 999 or go to A&E immediately if you experience signs of a severe allergic reaction (difficulty breathing, severe throat/facial swelling, or collapse) Contact your GP if you experience a rash, itching, persistent pain at the injection site, or worsening neurological symptoms despite treatment If you suspect any side effects from your B12 injections, you can report them through the MHRA Yellow Card scheme (yellowcard.mhra.gov.uk)
With B12 shots, this invaluable nutrient goes directly to the bloodstream instead of through the digestion process, which means you can get the benefits of it sooner
B12 is one important piece, but persistent exhaustion usually has more than one contributing factor
In fact, the chemical form in this product was chosen to avoid that side effect
10 CDCVaccine administration: subcutaneous route (angle/site