Related compounds and blends are comparisons only, not interchangeable
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)
A medical profile includes important information for the dispensing pharmacist, regarding allergies, other medications etc
Rather than asking what is the dose, which presumes the compound is already the answer, the stronger questions open up the actual decision