It is the FDAs way of flagging a substance that may present significant safety risks when used in compounding
Not for medical, diagnostic, or therapeutic use
Once prescription authorization is received, the order will be processed and shipped within 24-72 business hours
(2023c, April 27)
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)
Most users find the process straightforward after initial setup, but it does require more involvement than swallowing a capsule