Menadiol Sodium Phosphate Tablets: Uses, Dosage, Side Effects
Comprehensive guide to Menadiol Sodium Phosphate Tablets: uses, dosage, side effects, and essential safety information for effective treatment.
Menadiol Sodium Phosphate Tablets, also known as Menadiol Diphosphate 10mg Tablets, are a vital medication in managing blood clotting issues. This synthetic form of vitamin K, specifically vitamin K4, plays a crucial role in preventing and treating excessive bleeding, particularly in scenarios like post-surgery recovery or jaundice-related conditions where natural vitamin K absorption is impaired. Vitamin K is essential for the production of clotting factors such as prothrombin, factor VII, IX, and X, which help staunch bleeding and prevent hemorrhage.
About Menadiol Sodium Phosphate Tablets
Menadiol Sodium Phosphate is a water-soluble analog of vitamin K, designed for better absorption in patients with fat malabsorption issues, such as those with hepatic disease, biliary obstruction, or cystic fibrosis. Unlike fat-soluble natural vitamin K, this form is particularly useful when bile flow is deficient, ensuring the body can utilize it effectively despite dietary or absorption challenges.
The tablets are indicated for treating or preventing excessive bleeding in specific situations. For instance, after surgical procedures, patients may experience clotting deficiencies, and in cases of jaundice, the liver’s impaired function can hinder vitamin K processing, leading to bleeding risks. By supplementing with Menadiol Sodium Phosphate, normal clotting mechanisms are restored, reducing the likelihood of minor or life-threatening hemorrhages.
Each tablet contains 12.63mg of menadiol sodium diphosphate, equivalent to 10mg of the active menadiol diphosphate. This formulation ensures precise dosing for therapeutic efficacy. The medication’s water-soluble nature allows it to initiate effects within about 24 hours, with benefits lasting several days, making it suitable for oral administration in outpatient settings.
In clinical practice, it serves as a second-line option for vitamin K supplementation, especially in the North East and North Cumbria Formulary for patients with malabsorption syndromes. It can be administered orally, intramuscularly, or intravenously in some contexts, though tablets are primarily for oral use.
Key Facts
- Active Ingredient: Menadiol sodium diphosphate (10mg equivalent per tablet).
- Mechanism: Promotes synthesis of clotting factors to prevent bleeding.
- Ideal For: Adults and children with vitamin K deficiency due to malabsorption, surgery, or jaundice.
- Not For: Neonates or infants due to risk of hemolytic anemia.
- Onset: Approximately 24 hours, duration several days.
What You Need to Know Before Taking Menadiol Sodium Phosphate Tablets
Before commencing treatment, a thorough assessment of patient history is essential to avoid contraindications and interactions. This medication is not suitable for everyone, and certain conditions or concurrent therapies can alter its safety profile.
Do Not Take If:
- You are allergic to menadiol sodium diphosphate or any excipients like lactose monohydrate, pregelatinised starch, talc, or magnesium stearate.
- You are a baby or very young infant, as it may cause hemolytic anemia, especially in those with G6PD deficiency, leading to jaundice and kernicterus.
- You are pregnant, particularly in late pregnancy or during labor, unless explicitly advised by a doctor, due to potential risks to the fetus.
- You are breastfeeding, as it is not recommended during this period.
Warnings and Precautions
Inform your doctor if you have galactose intolerance, Lapp lactase deficiency, or glucose-galactose malabsorption, as the tablets contain lactose. Patients with liver disease or biliary issues should be monitored closely, though this is a preferred form for such cases.
If undergoing surgery or other medical treatments, disclose your use of this medication, as it affects clotting. Driving or operating machinery is generally unaffected.
Interactions
Menadiol opposes anticoagulants like warfarin, potentially reducing their efficacy. Always inform your healthcare provider of all medications, including over-the-counter ones. Other interactions may occur with drugs affecting liver function or clotting.
| Drug Class | Example | Effect |
|---|---|---|
| Anticoagulants | Warfarin | Opposes blood-thinning effect |
| Other Vitamin K forms | Phytonadione | May enhance clotting |
| Antibiotics | Broad-spectrum | May alter vitamin K levels |
Pregnancy and Breastfeeding
Use in pregnancy requires medical supervision; avoid in late stages. Not recommended while breastfeeding—consult your doctor for alternatives.
How to Take Menadiol Sodium Phosphate Tablets
Adhere strictly to prescribed dosages for safety and efficacy. Tablets are taken orally and can be divided for pediatric use.
Dosage Guidelines
- Adults: 1-4 tablets (10-40mg) daily, divided into doses.
- Children: ½ to 2 tablets (5-20mg) daily, adjusted by age and weight.
- Swallow with water; can be taken with or without food.
For malabsorption cases, higher initial doses like 540mg daily may be considered, but only under medical guidance. Continue as directed until bleeding risk subsides.
Missed Dose
Take as soon as remembered unless near next dose. Skip and resume schedule—never double dose.
Overdose
Seek immediate medical help. Symptoms may include excessive clotting; bring packaging to the emergency department.
Possible Side Effects
Side effects are rare but can occur. Monitor for allergic reactions: wheezing, swelling, rash—seek emergency care immediately.
Common (Uncommon)
- Hemolytic anemia: tiredness, paleness, jaundice (yellow skin/eyes).
- Destruction of red blood cells, more risky in G6PD deficient patients.
Rare but Serious
Anemia and jaundice require prompt reporting. Most users experience no issues.
| Frequency | Symptom | Action |
|---|---|---|
| Rare | Allergic reactions (rash, swelling) | Stop and seek help |
| Very Rare | Hemolytic anemia, jaundice | Contact doctor immediately |
How to Store Menadiol Sodium Phosphate Tablets
Store below 25°C in original packaging, away from light and moisture. Keep out of reach of children. Do not use after expiry date. Dispose of unused medicine via pharmacy take-back programs.
Contents of the Pack and Other Information
Active: Menadiol sodium diphosphate 12.63mg (equiv. 10mg menadiol diphosphate).
Excipients: Lactose monohydrate, pregelatinised starch, talc, magnesium stearate.
Packs typically contain 28 tablets. Manufactured by reputable pharmaceutical companies; check leaflet for batch details.
Frequently Asked Questions (FAQs)
What is Menadiol Sodium Phosphate used for?
It treats/prevents bleeding in surgery, jaundice, or malabsorption by aiding blood clotting as a vitamin K analog.
Can children take these tablets?
Yes, from ½ tablet daily, but not neonates due to anemia risk.
Is it safe in pregnancy?
Avoid unless doctor advises; not in late pregnancy or labor.
What if I miss a dose?
Take promptly or skip if near next; no doubling.
Does it interact with warfarin?
Yes, it counteracts blood thinners—inform your doctor.
References
- Menadiol Diphosphate Tablets 10mg – Patient Information Leaflet (PIL) — Electronic Medicines Compendium. 2023. https://www.medicines.org.uk/emc/product/1349/pil
- Menadiol | Drug Information, Uses, Side Effects, Chemistry — PharmaCompass. 2024. https://www.pharmacompass.com/chemistry-chemical-name/menadiol
- Vitamin K – North East and North Cumbria Formulary — NHS. 2025. https://www.northeastnorthcumbriaformulary.nhs.uk/searchresults.asp?SearchVar=Menadiol+Sodium+Phosphate
- Menadiol diphosphate: Uses, Interactions, Mechanism of Action — DrugBank. 2024. https://go.drugbank.com/drugs/DB14650
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