About methylcobalamin
Vitamin B12 (cobalamin)
Used for
- Treats vitamin B12 deficiency.
- May be used for certain nerve symptoms linked to deficiency.
Usual adult dose
Often 500–1,500 micrograms by mouth daily; dose depends on the cause and local guidance.
Usual dose in children
Dose is age- and cause-dependent; treatment should be prescribed by a clinician.
Common side effects
- Nausea or stomach discomfort
- Diarrhea
- Headache
- Rare allergic reactions or rash
Important warnings
- Methylcobalamin is a form of vitamin B12; deficiency may require investigation of its cause.
- Oral treatment may not be suitable for some absorption problems or severe deficiency.
- Seek urgent care for signs of a severe allergic reaction.
Pregnancy
Vitamin B12 is needed during pregnancy. Use the dose recommended by a healthcare professional.
Breastfeeding
Vitamin B12 is compatible with breastfeeding at recommended doses; low levels may affect the infant.
Interactions
- Chloramphenicol may reduce response to vitamin B12 treatment.
- Metformin and long-term acid-reducing medicines can lower vitamin B12 levels.
AI-generated from general medical knowledge, not from this product's official leaflet. It may be incomplete or out of date. Not medical advice — ask a pharmacist or doctor before making any decision.