b12 injection goodrx hers injections B12 Cyanocobalamin (Dodex): Uses, Side Effects,
Description
Both oral cyanocobalamin and injectable hydroxocobalamin list diarrhoea as a rare adverse reaction in UK product information

The National Institutes of Health recommends following their guidelines when taking vitamins

Drug Des Devel Ther
Press the plunger slowly and steadily until its fully down
The recommended dietary allowance (RDA) for vitamin B12 for people Note that the percent of vitamin B12 your body can absorb from supplements is not very high its estimated that your body only absorbs 10 mcg of a 500 mcg B12 supplement

Vitamin B12 is vital for the brain and blood cells