vitamin b12 1000 mcg injection price Cyanocobalamin (Vitamin B12) mcg/mL, Multiple Dose Vial 1 mL, 25/Tray This injectable formulation helps restore normal vitamin B Compounded Cyanocobalamin (Vitamin B12) Injection

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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

De novo mutations in synaptic transmission genes including DNM1 cause epileptic encephalopathies

Instead, gently swirl the vial between your fingers or roll it in your palms