can you feel b12 injection right away How to Self-Inject Vitamin at Home Feeling worse after B12 Injection:

Patients who have normal intestinal absorption may be treated with an oral therapeutic multivitamin preparation, containing 15 mcg vitamin B12 daily

B12 is typically administered intramuscularly into the deltoid (upper arm) or the gluteal muscle

Psychological problems may include depression, confusion, and difficulty with memory, or even dementia

Systemic Reactions : Although rare, some individuals may experience more widespread symptoms such as fatigue, headaches, or gastrointestinal issues

If any oral hypoglycemics are used during breastfeeding, the nursing infant should be monitored for signs of hypoglycemia, such as increased fussiness or somnolence

You also get vitamin B12 in eggs, dairy, and foods fortified with this nutrient