Vitamin B12 deficiency can occur due to dietary restrictions (vegetarian or vegan diets), absorption issues (pernicious anemia or gut disorders like celiac disease or Crohns disease), age-related changes in elderly patients, or long-term use of certain medicines
[21] When treated with cyanocobalamin, patients with Leber's disease may develop serious optic atrophy, possibly leading to blindness, based on few case reports
These could include symptoms such as itching, a rash/hives, swelling especially around the face or throat, or difficulty breathing
This product should only be handled by qualified, and licensed professionals
Folate (aka folic acid/vitamin B9 NB: Folic acid is the synthetic form of B9, found in supplements and fortified foods
includes warnings that parenteral thiamine may cause anaphylaxis and that the benzyl alcohol preservative is contraindicated in neonates due to risk of serious reactions)