GENERIC NAME: VITAMIN K - ORAL
BRAND NAME(S): Mephyton
Medication Uses | How To Use | Side Effects | Precautions | Drug Interactions | Overdose | Notes | Missed Dose | Storage
USES: Vitamin K is used to treat and prevent low levels of certain substances (blood clotting factors) that your body naturally produces. These substances help your blood to thicken and stop bleeding normally (e.g., after an accidental cut or injury). Low levels of blood clotting factors increase the risk for unusual bleeding. Low levels may be caused by certain medications (e.g., warfarin) or medical conditions (e.g., obstructive jaundice). Vitamin K helps to treat and prevent unusual bleeding by increasing the body's production of blood clotting factors.
HOW TO USE: If you are taking the over-the-counter product to self-treat, read all directions on the product package before taking this medication. If you have any questions, consult your pharmacist. If your doctor has prescribed this medication, take it as directed.Take this medication by mouth exactly as directed by your doctor. Dosage is based on your medical condition and response to treatment.If you are using a certain "blood thinner" drug (warfarin), vitamin K can decrease the effects of warfarin for up to 2 weeks. Therefore, be sure to take your vitamin K and warfarin exactly as directed by your doctor or pharmacist.If you develop easy bruising or bleeding, seek immediate medical attention. You may need another dose of vitamin K.
SIDE EFFECTS: Vitamin K usually has very few side effects. If you have any unusual effects from taking this medicine, tell your doctor or pharmacist promptly.If your doctor has prescribed this medication, remember that he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.A very serious allergic reaction to this drug is rare. However, seek immediate medical attention if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.This is not a complete list of possible side effects. If you notice other effects not listed above, tell your doctor or pharmacist.In the US -Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.
PRECAUTIONS: Before taking vitamin K, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.Before using this medication, tell your doctor or pharmacist your medical history, especially of: blood disorders, gallbladder disease (e.g., obstructive jaundice, biliary fistula), liver disease.During pregnancy, this medication should be used only when clearly needed. Discuss the risks and benefits with your doctor.It is not known whether this medication passes into breast milk. Consult your doctor before breast-feeding.
DRUG INTERACTIONS: Your doctor or pharmacist may already be aware of any possible drug interactions and may be monitoring you for them. Do not start, stop, or change the dosage of any medicine before checking with your doctor or pharmacist first.Before using this medication, tell your doctor or pharmacist of all prescription and nonprescription/herbal products you may use, especially of: "blood thinners" (e.g., warfarin), nonsteroidal anti-inflammatory drugs-NSAIDs (e.g., ibuprofen, naproxen).Aspirin can increase the risk of bleeding. However, if your doctor has directed you to take low-dose aspirin for heart attack or stroke prevention (usually at dosages of 81-325 milligrams a day), you should continue taking it unless your doctor instructs you otherwise. Ask your doctor or pharmacist for more details.Avoid taking this medication at the same time as orlistat (a weight-management drug). Wait at least 2 hours between taking this medication and orlistat because taking them together may decrease the effect of vitamin K.This document does not contain all possible interactions. Therefore, before using this product, tell your doctor or pharmacist of all the products you use. Keep a list of all your medications with you, and share the list with your doctor and pharmacist.
OVERDOSE: If overdose is suspected, contact a poison control center or emergency room immediately. US residents can call their local poison control center at 1-800-222-1222. Canada residents can call a provincial poison control center.
NOTES: Do not share this medication with others.Laboratory and/or medical tests (e.g., prothrombin time, INR) should be performed to monitor your progress or check for side effects. Consult your doctor for more details.Vitamin K is commonly found in leafy green vegetables such as spinach, collards, and broccoli. Follow any dietary guidelines recommended by your health care professional.
MISSED DOSE: If you are taking this product on a prescribed schedule and miss a dose, take it as soon as you remember. If it is near the time of the next dose, skip the missed dose and resume your usual dosing schedule. Do not double the dose to catch up.
STORAGE: Store at room temperature between 59-86 degrees F (15-30 degrees C) away from light and moisture. Do not store in the bathroom. Keep all medicines away from children and pets.Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company for more details about how to safely discard your product.
Information last revised December 2013. Copyright(c) 2013 First Databank, Inc.
Multimedia: Slideshows, Images & Quizzes
Vitamins and Supplements: Test Your Medical IQ
Take the Vitamins & Supplements Quiz to learn just how many essential vitamins your body needs to function!
Celiac Disease Quiz: What Is Celiac Disease?
Could celiac disease be the cause of your tummy troubles? Take the Celiac Disease Quiz to learn what certain foods may be doing...
Related Disease Conditions
Cirrhosis of the liver refers to a disease in which normal liver cells are replaced by scar tissue caused by alcohol and viral hepatitis B and C. This disease leads to abnormalities in the liver's ability to handle toxins and blood flow, causing internal bleeding, kidney failure, mental confusion, coma, body fluid accumulation, and frequent infections. Symptoms include yellowing of the skin (jaundice), itching, and fatigue. The prognosis is good for some people with cirrhosis of the liver, and the survival can be up to 12 years; however the life expectancy is about 6 months to 2 years for people with severe cirrhosis with major complications.
Jaundice in Adults (Hyperbilirubinemia)
Jaundice or hyperbilirubinemia in adults is caused by an underlying disease or condition. Learn about when to worry about jaundice in adults, symptoms, treatment, causes, diagnosis, and prevention.
Vitamins and Calcium Supplements
Vitamins are organic substances that are essential for the proper growth and functioning of the body. Calcium is a mineral essential for healthy bones and is also important for muscle contraction, heart action, and normal blood clotting. Check out the center below for more medical references on vitamins and calcium supplements, including multimedia (slideshows, images, and quizzes), related disease conditions, treatment and diagnosis, medications, and prevention or wellness.
Celiac disease is a condition in which a person has inflammation of the small intestinal mucosa when exposed to gluten in the diet. Symptoms of celiac disease include bloating, nausea, diarrhea, and abdominal discomfort. Treatment involves following a gluten-free diet. Some individuals may have refractory celiac disease in which they do not respond to a gluten-free diet.
Primary Biliary Cirrhosis (PBC)
Primary Biliary Cirrhosis (PBS) is a liver disease in which bile building up in the organ damages bile ducts. Ultimately, this can cause liver failure. A number of drugs are available to treat this disease of unknown cause, but the only ultimate cure is a liver transplant.
What Is the Best Vitamin Supplement to Take?
Dietary supplements are a general term that includes vitamins, minerals, botanicals, probiotics and other products to supplement the diet. The best vitamin supplement differs from person to person depending on their gender, age and any health conditions they have.
Treatment & Diagnosis
Medications & Supplements
Prevention & Wellness
- FDA Panel Backs RSV Vaccine for Infants, Some Toddlers
- Seniors: Stay Social, Active for 'Optimal Aging,' Study Shows
- Diabetes Med Metformin Might Help Prevent Long COVID
- Disability a Growing Concern for U.S. Cancer Survivors
- Smoke From Wildfires Is Especially Tough If You Have Asthma. Here’s How to Protect Yourself
- More Health News »
Health Solutions From Our Sponsors
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
CONDITIONS OF USE: The information in this database is intended to supplement, not substitute for, the expertise and judgment of healthcare professionals. The information is not intended to cover all possible uses, directions, precautions, drug interactions or adverse effects, nor should it be construed to indicate that use of particular drug is safe, appropriate or effective for you or anyone else. A healthcare professional should be consulted before taking any drug, changing any diet or commencing or discontinuing any course of treatment.