International journal of physiology, pathophysiology and pharmacology , 10 (3), 132138
Excipients such as sorbitol, mannitol (sugar alcohols), lactose (in those with intolerance), and various binding agents or fillers may contribute to gastrointestinal symptoms
There is After having a B12 shot, a person should monitor for adverse symptoms and seek medical help if they experience: severe pain at the injection site mild diarrhea a swelling sensation in the body temporary itching of the skin In rare cases, a person may also be at risk of: anaphylaxis pulmonary edema congestive heart failure peripheral vascular thrombosis, which involves blood clots polycythemia vera, which is a type of blood cancer If anyone experiences difficulty breathing, hives, or swelling, they need emergency medical help
Patients with severe, longstanding deficiency typically require longer recovery periods, with haematological improvement occurring over weeks and neurological recovery potentially taking months