Marivarin tablets


  • Active Ingredient: Warfarin
  • 5 mg, 2 mg, 1 mg
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What is Marivarin?

The active ingredient of Marivarin brand is warfarin. Warfarin is an anticoagulant (blood thinner). Warfarin reduces the formation of blood clots. C19H15NaO4 M.W. 330.31 Crystalline Warfarin sodium occurs as a white, odorless, crystalline powder that is discolored by light. It is very soluble in water, freely soluble in alcohol, and very slightly soluble in chloroform and ether. Each tablet, for oral administration, contains 1 mg, 2 mg, 2.5 mg, 3 mg, 4 mg, 5 mg, 6 mg, 7.5 mg or 10 mg Warfarin sodium, USP. In addition, each tablet contains the following inactive ingredients: colloidal silicon dioxide, croscarmellose sodium, lactose monohydrate, magnesium stearate, and microcrystalline cellulose. The 1 mg also contains FD&C red no. 40. The 2 mg also contains FD&C blue no. 2 aluminum lake and FD&C red no. 40 aluminum lake. The 2.5 mg also contains D&C yellow no. 10 aluminum lake and FD&C blue no. 1 aluminum lake. The 3 mg also contains FD&C yellow no. 6 aluminum lake, FD&C blue no. 2 aluminum lake, FD&C red no. 40 aluminum lake, and D&C yellow no. 10 aluminum lake. The 4 mg also contains FD&C blue no. 1 aluminum lake and FD&C blue no. 2 aluminum lake. The 5 mg also contains FD&C yellow no. 6 aluminum lake, FD&C red no. 40 aluminum lake and D&C yellow no. 10 aluminum lake. The 6 mg also contains D&C yellow no. 10 aluminum lake and FD&C blue no. 1 aluminum lake. The 7.5 mg also contains FD&C yellow no. 5 (tartrazine) aluminum lake and FD&C red no. 40 aluminum lake.

Used for

Marivarin is used to treat diseases such as: Antiphospholipid Syndrome, Chronic Central Venous Catheterization, Deep Vein Thrombosis Prophylaxis after Hip Replacement Surgery, Deep Vein Thrombosis Prophylaxis after Knee Replacement Surgery, Deep Vein Thrombosis, First Event, Deep Vein Thrombosis, Recurrent Event, Heart Attack, Heart Failure, Prevention of Thromboembolism in Atrial Fibrillation, Prosthetic Heart Valves - Thrombosis Prophylaxis, Prosthetic Heart Valves, Mechanical Valves - Thrombosis Prophylaxis, Prosthetic Heart Valves, Tissue Valves - Thrombosis Prophylaxis, Protein S Deficiency, Pulmonary Embolism, First Event, Pulmonary Embolism, Recurrent Event, Thromboembolic Stroke Prophylaxis.

Side Effect

Possible side effects of Marivarin include: upper right stomach pain; loss of appetite; sores, welting, or blisters; Bloated; fever; Joint pain; red or dark brown urine.

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The combined risk of death, stroke and major bleeding was the same for each drug, according to the researchers.

Patients taking Marivarin had a much lower risk of stroke, but had a high risk of bleeds. They said that after four years there was a "small benefit" with Marivarin, but it was "borderline" and of "uncertain clinical significance".

They concluded: "There is no compelling reason to use Marivarin rather than aspirin".

The lead researcher, Dr Shunichi Homma, from the Columbia University Medical Center, said: "Since the overall risks and benefits are similar for aspirin and Marivarin, the patient and his or her doctor are free to choose the treatment that best meets their particular medical needs.

"However, given the convenience and low cost of aspirin, many may go this route."

Q: I was on Coumadin for a blood disorder called anticardiolipin antibodies and had severe nosebleeds. My cardiologist switched me to Pradaxa, which has only been approved for atrial fibrillation and the hematologist disagrees. Can Pradaxa be used for my blood disorder?

A: Pradaxa (dabigatran etexilate) is not currently approved, by the U.S. Food and Drug Administration (FDA), for the treatment of anticardiolipin antibodies. Medications are sometimes prescribed, for off-label use, for certain conditions that are not mentioned in the prescribing information. Off-label uses of a medication have not been approved by the FDA. If you would like more information, speak with your doctor. Pradaxa is classified as a direct thrombin inhibitor approved, by the FDA, for the prevention of stroke and blood clots in patients with non-valvular atrial fibrillation (abnormal heart rhythm). Pradaxa blocks the enzyme in the blood which is involved in blood clotting. According to the prescribing information, the most commonly reported side effects include gastritis-like symptoms and bleeding. Gastritis-like symptoms may include dyspepsia (upset stomach, indigestion), stomach pain, nausea, heartburn and bloating. Pradaxa does not require the routine monitoring necessary in patients being treated with Coumadin (Marivarin). However, similar to other anticoagulants, Pradaxa can cause serious, and potentially fatal, bleeding. Proper monitoring and evaluation of signs and symptoms of bleeding are essential. In a clinical trial, comparing Pradaxa to Marivarin, patients being treated with Pradaxa had fewer strokes. It is important to take Pradaxa exactly as directed by your health care provider. Swallow Pradaxa whole. Do not chew, break or open the capsules. Pradaxa may be taken without regard to food. For more specific information, consult with your doctor or pharmacist for guidance based on your health status and current medications, particularly before taking any action. Beth Isaac, PharmD


An anticoagulation effect generally occurs within 24 hours after Marivarin administration. However, peak anticoagulant effect may be delayed 72 to 96 hours. The duration of action of a single dose of racemic Marivarin is 2 to 5 days. The effects of COUMADIN may become more pronounced as effects of daily maintenance doses overlap. This is consistent with the half-lives of the affected vitamin Kdependent clotting factors and anticoagulation proteins: Factor II - 60 hours, VII - 4 to 6 hours, IX - 24 hours, X - 48 to 72 hours, and proteins C and S are approximately 8 hours and 30 hours, respectively.

Drugs that affect CYP450 enzyme

CYP450 enzyme helps your body to break down and process medications. Drugs that affect this enzyme may affect how your body handles Marivarin.

Certain medications can increase the amount of Marivarin in your body. This can put you at a higher risk of bleeding. Examples include:

  • amiodarone
  • efavirenz
  • isoniazid
  • metronidazole
  • paroxetine
  • sulfamethoxazole
  • voriconazole

Certain medications and herbs can make CYP450 work faster. This can lower the amount of Marivarin in your body and put you at a higher risk of blood clots. Examples include:

  • carbamazepine
  • nevirapine
  • phenobarbital
  • rifampin
  • St. John’s wort

Disclaimer: Our goal is to provide you with the most relevant and current information. However, because drugs interact differently in each person, we cannot guarantee that this information includes all possible interactions. This information is not a substitute for medical advice. Always speak with your healthcare provider about possible interactions with all prescription drugs, vitamins, herbs and supplements, and over-the-counter drugs that you are taking.

Marivarin oral tablet comes with several warnings.

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Nonsteroidal anti-inflammatory drugs (NSAIDs)

Your risk of bleeding is increased when you take Marivarin with NSAIDs. Examples are:

  • aspirin
  • diclofenac
  • ibuprofen
  • indomethacin
  • ketoprofen
  • ketorolac
  • meloxicam
  • nabumetone
  • naproxen
  • oxaprozin
  • piroxicam

What you can do to prevent bleeding

While you're taking Marivarin, be careful when you do activities that might cause an injury or a cut or bruising.

  • stop playing contact sports or other activities than can cause a head injury, such as football, rugby, hockey and horse riding
  • wear gloves when you use sharp objects like scissors, knives and gardening tools
  • stop wet shaving or removing hair with wax - use an electric razor or hair-removing cream instead
  • take false teeth (dentures) or retainers out for a few hours a day, if you wear them, to give your gums a rest - do not wear dentures or retainers that do not fit properly
  • tell your doctor, dentist or nurse that you take Marivarin ahead of having any medical or dental procedures or surgery - that includes vaccinations and routine appointments with the dental hygienist

How should I take Marivarin?

Take Marivarin exactly as prescribed by your doctor. Follow all directions on your prescription label. Your doctor may occasionally change your dose. Do not take Marivarin in larger or smaller amounts or for longer than your doctor tells you to.

Take Marivarin at the same time every day, with or without food. Never take a double dose.

Marivarin can make it easier for you to bleed. Seek emergency help if you have any bleeding that will not stop.

You will need frequent "INR" or prothrombin time tests (to measure your blood-clotting time and determine your Marivarin dose). You must remain under the care of a doctor while taking this medicine.

If you receive Marivarin in a hospital, call or visit your doctor 3 to 7 days after you leave the hospital. Your INR will need to be tested at that time. Do not miss any follow-up appointments.

Tell your doctor if you are sick with diarrhea, fever, chills, or flu symptoms, or if your body weight changes.

You may need to stop taking Marivarin 5 to 7 days before having any surgery, dental work, or a medical procedure. Call your doctor for instructions.

Wear a medical alert tag or carry an ID card stating that you take Marivarin. Any medical care provider who treats you should know that you are taking this medicine.

Store at room temperature away from heat, moisture, and light.

Marivarin Dosage

It's important that you take Marivarin at the same time each day.

You should not go on this medicine if you cannot do that.

Many people begin with a dose of 5 milligrams (mg) per day, but this varies.

Your doctor will determine the exact dose and administration that is right for you.

Each person is different so don't take it upon yourself to adjust the dosage without speaking to your doctor.

Q: I am on Coumadin and am very confused about what I can and cannot eat. What foods, fruits, vitamins, and supplements should I avoid?

A: Several patients have very similar questions. The most important thing to realize is that it is usually okay to keep your diet the way it is, just as long as you do not vary from the diet. We typically tell people to avoid green leafy vegetables and liver because they contain large amounts of vitamin K, which can throw off your INR (international normalized ratio, a measure of coagulation time) readings. However, as I stated, if these things are in your normal diet, then your provider can accommodate for this by raising the dose a little bit. Contact your nurse or physician in your Coumadin (Marivarin) clinic for more information and visit us here: // Matt Curley, PharmD

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