Normally no, apart from an achy muscle at the injection site, which normally does not last for more than an hour or so
These include: Allergic reaction : Symptoms such as itching, rash, or difficulty breathing
For example, someone with severe B12 deficiency and neurological symptoms might need more frequent injections at first
What Does a Vitamin B12 Injection Do in the Body
5-amino-1mq should typically be stored in a cool, dry place away from light
Reported areas of investigation include angiogenesis (the formation of new blood vessels in tissue models), the modulation of inflammatory signaling, and cellular response in wound- and recovery-model systems