Adverse reactions following intramuscular (IM) injection have included anxiety, mild transient diarrhea, ataxia, nervousness, pruritus, transitory exanthema, and a feeling of swelling of the entire body
If you see blood, it means you've hit a blood vesselsimply withdraw, safely dispose of the needle, and start over with fresh supplies
Some people will also develop a pale-yellow complexion on their skin when suffering from a vitamin B12 deficiency
For general wellness support, a monthly or bi-monthly schedule is typical
Likewise, symptoms of vitamin B12 can also resemble anemia or fatigue, causing some people to think that they are simply tired