b12 injections are used for Sandoz Vitamin Injectable Solution - 1000 mcg/10 mL Best Vitamin B12 Injection Site:
Description
doi:10.1016/S0026-0495(96)90171-7

Tuna fish is widely available

Although not common, cyanocobalamin injections can also cause side effects such as diarrhea or a sensation that your entire body is swollen

Histamine in the regulation of wakefulness
