Capecitabine Warfarin interaction: Patients receiving concomitant capecitabine and oral coumarin-derivative anticoagulant therapy should have their anticoagulant response (INR or prothrombin time) monitored frequently in order to adjust the anticoagulant dose accordingly. A clinically important capecitabine-Warfarin drug interaction was demonstrated in a clinical pharmacology trial. Altered coagulation parameters and/or bleeding, including death, have been reported in patients taking capecitabine concomitantly with coumarin-derivative anticoagulants such as warfarin and phenprocoumon. Postmarketing reports have shown clinically significant increases in prothrombin time (PT) and INR in patients who were stabilized on anticoagulants at the time capecitabine was introduced. These events have occurred within several days and up to several months after initiating capecitabine therapy and, in a few cases, within 1 month after stopping capecitabine. These events occurred in patients with and without liver metastases. Age greater than 60 and a diagnosis of cancer independently predispose patients to an increased risk of coagulopathy .
Patients receiving concomitant capecitabine and oral coumarin-derivative anticoagulant therapy should have their anticoagulant response (INR or prothrombin time) monitored frequently in order to adjust the anticoagulant dose accordingly. Altered coagulation parameters and/or bleeding, including death, have been reported in patients taking capecitabine concomitantly with coumarin-derivative anticoagulants. These events occurred in patients with and without liver metastases. Age greater than 60 and a diagnosis of cancer independently predispose patients to an increased risk of coagulopathy .
Commonly used brand name(s):
In the U.S.
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Therapeutic Class: Antineoplastic Agent
Pharmacologic Class: Antimetabolite
Capecitabine belongs to the group of medicines called antimetabolites. It is used to treat breast cancer and colorectal cancer.
Capecitabine interferes with the growth of cancer cells, which are eventually destroyed. Since the growth of normal cells may also be affected by the medicine, other effects will also occur. Some of these may be serious and must be reported to your doctor. Other effects may not be serious but may cause concern.
capecitabine is available only with your doctor's prescription.
Once a medicine has been approved for marketing for a certain use, experience may show that it is also useful for other medical problems. Although these uses are not included in product labeling, capecitabine is used in certain patients with the following medical conditions:
In deciding to use a medicine, the risks of taking the medicine must be weighed against the good it will do. This is a decision you and your doctor will make. For capecitabine, the following should be considered:
Tell your doctor if you have ever had any unusual or allergic reaction to capecitabine or any other medicines. Also tell your health care professional if you have any other types of allergies, such as to foods, dyes, preservatives, or animals. For non-prescription products, read the label or package ingredients carefully.
There is no specific information comparing use of capecitabine in children with use in other age groups.
Patients 80 years of age or older may be more sensitive to the effects of capecitabine. Severe diarrhea, nausea, or vomiting may be more likely to occur in these patients. Patients 60 years of age and older and/or who are also taking an anticoagulant (blood thinner), may be more likely to have blood clotting problems.
|All Trimesters||D||Studies in pregnant women have demonstrated a risk to the fetus. However, the benefits of therapy in a life threatening situation or a serious disease, may outweigh the potential risk.|
There are no adequate studies in women for determining infant risk when using this medication during breastfeeding. Weigh the potential benefits against the potential risks before taking this medication while breastfeeding.
Using capecitabine with any of the following medicines is not recommended. Your doctor may decide not to treat you with this medication or change some of the other medicines you take.
Using capecitabine with any of the following medicines is usually not recommended, but may be required in some cases. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.
Using capecitabine with any of the following medicines may cause an increased risk of certain side effects, but using both drugs may be the best treatment for you. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.
Certain medicines should not be used at or around the time of eating food or eating certain types of food since interactions may occur. Using alcohol or tobacco with certain medicines may also cause interactions to occur. Discuss with your healthcare professional the use of your medicine with food, alcohol, or tobacco.
The presence of other medical problems may affect the use of capecitabine. Make sure you tell your doctor if you have any other medical problems, especially:
Each dose of capecitabine should be taken within 30 minutes after the end of a meal.
Swallow the tablets with water.
The dose of capecitabine will be different for different patients. Follow your doctor's orders or the directions on the label. The following information includes only the average doses of capecitabine. If your dose is different, do not change it unless your doctor tells you to do so.
The amount of medicine that you take depends on the strength of the medicine. Also, the number of doses you take each day, the time allowed between doses, and the length of time you take the medicine depend on the medical problem for which you are using the medicine.
If you miss a dose of capecitabine, skip the missed dose and go back to your regular dosing schedule. Do not double doses.
Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light. Keep from freezing.
Keep out of the reach of children.
Do not keep outdated medicine or medicine no longer needed.
Ask your healthcare professional how you should dispose of any medicine you do not use.
It is very important that your doctor check your progress at regular visits to make sure that capecitabine is working properly and to check for unwanted effects.
Your health care professional may request that you have a test to determine if your blood is clotting properly and may preform this test frequently, if you are also taking an anticoagulant (blood thinner).
Check with your doctor immediately if you develop a fever of 100.5 degrees F or higher, or if you notice any other signs of a possible infection. These signs include cough or hoarseness, lower back or side pain, painful or difficult urination, sneezing, sore throat, stuffy nose, and white spots inside the mouth or throat.
Stop taking capecitabine and check with your doctor immediately if any of the following occur:
If vomiting occurs less often than mentioned above, or if nausea does not cause you to eat less than usual, it is not necessary for you to stop taking the medicine or to check with your doctor (unless these effects are particularly bothersome). Also, you do not need to stop taking the medicine if diarrhea occurs less often than mentioned above or if the other side effects listed are not severe enough to interfere with eating or other daily activities. However, check with your doctor as soon as possible if they occur.
While you are being treated with capecitabine, and after you stop treatment with it, do not have any immunizations (vaccinations) without your doctor's approval. Capecitabine may lower your body's resistance and there is a chance you might get the infection the immunization is meant to prevent. In addition, other persons living in your household should not take oral polio vaccine since there is a chance they could pass the polio virus on to you. Also, avoid persons who have taken oral polio vaccine within the last several months. Do not get close to them, and do not stay in the same room with them for very long. If you cannot take these precautions, you should consider wearing a protective face mask that covers the nose and mouth.
Capecitabine can temporarily lower the number of white blood cells in your blood, increasing the chance of getting an infection. It can also lower the number of platelets, which are necessary for proper blood clotting. If this occurs, there are certain precautions you can take, especially when your blood count is low, to reduce the risk of infection or bleeding:
Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Stop taking capecitabine and get emergency help immediately if any of the following effects occur:More common
Check with your doctor immediately if any of the following side effects occur:Less common or rare
Check with your doctor as soon as possible if any of the following side effects occur:More common
Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:More common
Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.
Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.
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