About methylcobalamin jp
Vitamin B12 (cobalamin)
Used for
- Prevention and treatment of vitamin B12 deficiency
- Treatment of deficiency-related nerve symptoms
Usual adult dose
Often 1,000–1,500 micrograms by mouth daily; dosing depends on the cause and local guidance.
Common side effects
- Nausea or stomach upset
- Diarrhea
- Headache
- Rare allergic reactions
Important warnings
- Correctly diagnose the cause of deficiency; some causes need lifelong treatment.
- Seek urgent care for signs of a severe allergic reaction.
- Nerve damage from deficiency may not fully reverse if treatment is delayed.
Pregnancy
Vitamin B12 is important during pregnancy. Treatment and dose depend on deficiency and clinical guidance.
Breastfeeding
Vitamin B12 is compatible with breastfeeding; adequate maternal intake supports breast milk levels.
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 It may be incomplete or out of date.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.