Vitamin (Haemostatic — helps stop bleeding)
Last reviewed June 2026
Who is this for?
Vitamin K3 (Menadione) is a synthetic form of vitamin K that helps your blood clot properly — it supports your body in making the proteins needed to stop bleeding when you get a cut or injury.
Activates vitamin K-dependent carboxylation of clotting factors II, VII, IX, and X in the liver, enabling their binding to phospholipid surfaces and restoring the coagulation cascade necessary for haemostasis.
Prescription Required
You need a doctor's prescription to buy this drug.
Explore this drug
For adults, the usual dose is 5 to 10 mg taken once daily by mouth. Your doctor will decide the exact dose based on your condition. You can take it with or without food, but taking it with a small meal that contains some oil or fat helps your body absorb it better.
If you miss a dose, take it as soon as you remember. But if it is almost time for your next dose, skip the missed one and continue your normal schedule. Do not take two doses at once to make up for it.
Only buy from licensed pharmacies — avoid buying Vitamin K products from roadside vendors or unregistered shops as you may get fake or expired products. Do not self-diagnose bleeding problems; see a doctor first to confirm you actually need vitamin K before taking it. Products like Manfes Vitamin K Tablets should be used exactly as directed by your pharmacist or doctor — do not increase the dose on your own.
Blood thinners like warfarin — Vitamin K3 works against blood thinners and can make them less effective, so tell your doctor if you are on warfarin. Antibiotics taken for a long time can lower your body's own vitamin K, which may change how this drug works. Avoid drinking alcohol heavily while taking this medication as it can worsen liver problems and affect how the drug works.
Check your specific combination
Is it safe to take Vitamin with your other drugs?
Vitamin K3 (Menadione) is NOT safe during pregnancy or breastfeeding as it can cause serious harm to the unborn baby or newborn — always consult your doctor who may prescribe a safer form of vitamin K if needed.
Store in a cool, dry place away from direct sunlight and heat — Nigerian weather can be very hot, so avoid leaving it near windows or in your car. Keep the container tightly closed to protect from humidity and always store out of reach of children.
For information only — not medical advice. Always talk to a doctor or pharmacist before changing your medication.
Names this drug is sold under — especially in Nigerian and West African pharmacies
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Counterfeit Drug Warning
Fake drugs are a serious problem in Nigeria. Always buy from a registered pharmacy. If the packaging looks different from what is described above, do not use it.