Known side effects of Key B12 Cap include Nausea, stomach upset, diarrhea, headache, dizziness, skin rash, itching. Not everyone experiences these side effects.
This is not an exhaustive list. Consult your doctor if you notice any unusual symptoms.
Important Warnings
Use with caution if you have a history of hypersensitivity to cobalamins. In megaloblastic anemia, confirm diagnosis before treatment; folate supplementation alone can mask B12 deficiency and worsen neurological symptoms. Seek medical advice if symptoms persist or if you have severe anemia, unexplained weight loss, or neurological symptoms.
Drug Interactions
Key B12 Cap may interact with the following:
Chloramphenicol (may reduce hematologic response)
metformin (long-term use may reduce B12 levels)
proton pump inhibitors/H2 blockers (long-term use may reduce B12 absorption)
nitrous oxide anesthesia (can inactivate B12)
colchicine (may reduce absorption)
Always tell your doctor about all medicines you are taking, including over-the-counter drugs and supplements.
Pregnancy Safety
Generally safe (use as directed)
Alcohol Interaction
Use with caution (chronic alcohol use can worsen vitamin deficiency and neuropathy)
Habit Forming
No
Storage
Store below 25°C in a cool, dry place. Protect from light and moisture. Keep out of reach of children.
Key B12 Cap — Safety Summary
Composition
Methylcobalamin (Vitamin B12) (strength unknown)
Prescription
Not required (OTC)
Pregnancy
Generally safe (use as directed)
Alcohol
Use with caution (chronic alcohol use can worsen vitamin deficiency and neuropathy)
Habit forming
No
Key B12 Cap — Safety FAQs
What should I do if I experience side effects?
Mild side effects often resolve on their own. If side effects are severe or persistent, stop the medicine and consult your doctor immediately.
Are all listed side effects common?
No. Some side effects are common while others are rare. Not everyone experiences side effects. Consult your doctor if you are concerned.
Can I take this medicine with other drugs?
Some medicines interact with each other. Always inform your doctor about all medicines you are currently taking.
When should I seek emergency help?
Seek immediate medical attention if you experience severe allergic reactions (difficulty breathing, swelling of face/throat), chest pain, or any life-threatening symptoms.
This information is for educational purposes only and is not a substitute for professional medical advice. If you experience severe side effects, seek medical attention immediately.
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