Conclusion Exposures to glucagon-like peptide-1 receptor agonist have increased substantially over the years
While alternative routes, including topical, implantable and microneedle patches, also exist, studies suggest that engineering GLP1 analogs to resist enzymatic breakdown extends halflife and enhances therapeutic effect
Curr Treat Options Psychiatry
Always good to have a reason I have also had this happen when my folate was low , it may be worth you getting it checked I had self inject my B12 every 4 weeks for the last 20+ (cannot really remember how long accurately), and 2 months ago got a similar 'electric shock tingling' all over my body - head, face, arms, hands, legs, feet etc within a couple of minutes of injecting, which lasted about 3 seconds or so