Capecitabine

Generic Name: Capecitabine

Brand Names: Xeloda

Capecitabine is used to treat colorectal and breast cancer. It is available as Xeloda and is commonly prescribed in the oncology category.

OncologyChemotherapy

Drug Class

Oral Fluoropyrimidine Antimetabolite (5-FU Prodrug)

Pregnancy

Category D — Capecitabine can cause fetal harm based on its mechanism of action and animal data. Females of reproductive potential should use effective contraception during therapy and for 6 months after the final dose; males with female partners of reproductive potential should use condoms during and for 3 months after therapy. An FDA Boxed Warning addresses warfarin interaction and bleeding risk.

Available Forms

Oral tablet (150 mg, 500 mg)

What It's Used For

Capecitabine is prescribed to treat:

• Colorectal and breast cancer • Various related conditions in the oncology category • Associated symptoms and complications

It is an important medication that helps manage these conditions effectively.

Dosage Quick Reference

These are general dosage guidelines. Your doctor will determine the appropriate dose for your specific situation.

Condition	Starting Dose	Maintenance Dose
Metastatic colorectal cancer (monotherapy)	1,250 mg/m² orally twice daily, days 1–14 of a 21-day cycle	Continue per cycle; reduce for toxicity per FDA label
Adjuvant colon cancer (Stage III)	1,250 mg/m² orally twice daily, days 1–14 of a 21-day cycle	Continue for 8 cycles (24 weeks total)
Metastatic breast cancer (with docetaxel)	1,250 mg/m² orally twice daily, days 1–14 of a 21-day cycle	Continue per cycle; reduce dose for hand-foot syndrome or diarrhea
Patients with moderate renal impairment (CrCl 30–50 mL/min)	950 mg/m² orally twice daily, days 1–14 of a 21-day cycle	Continue with close monitoring

Side Effects

Common side effects may include:

• Nausea or stomach upset • Headache • Dizziness or lightheadedness • Fatigue or tiredness • Mild rash or itching

Serious side effects (seek immediate medical attention):

• Severe allergic reactions (rash, hives, swelling, difficulty breathing) • Unusual bleeding or bruising • Severe stomach pain • Signs of liver problems (yellowing of skin/eyes, dark urine) • Chest pain or irregular heartbeat • Severe dizziness or fainting • Signs of serious adverse effects

Drug Interactions

Capecitabine is converted to 5-fluorouracil (5-FU) and inherits 5-FU important interactions. Several can be life-threatening.

Warfarin and other coumarin anticoagulants: Capecitabine substantially increases INR and bleeding risk, sometimes weeks after initiation or even after capecitabine is discontinued. An FDA Boxed Warning requires INR monitoring at least weekly during therapy and dose adjustment of warfarin. Consider switching to a non-coumarin anticoagulant when possible.
Phenytoin: Plasma phenytoin levels may rise, causing toxicity (ataxia, nystagmus, sedation). Monitor levels and reduce phenytoin dose as needed.
Allopurinol: Reduces 5-FU activation and may decrease capecitabine efficacy. Avoid concurrent use.
Folic acid / leucovorin: Enhances both efficacy and toxicity of 5-FU. Combinations are intentional in some regimens but require dose-adjustment based on protocol.
Strong CYP2C9 inhibitors or substrates: 5-FU is a CYP2C9 inhibitor; co-administration with sensitive substrates may require dose adjustment.
Live vaccines: Capecitabine causes immunosuppression; live or live-attenuated vaccines should be deferred during and for several months after therapy.

Additional Information

What is Capecitabine?

Capecitabine (generic name: Capecitabine) is a medication primarily used to treat colorectal and breast cancer. It is marketed under the brand name(s) Xeloda and belongs to the Oncology category of medications.

How Does Capecitabine Work?

Capecitabine works through several mechanisms to provide therapeutic benefits:

Acts on specific receptors or pathways in the body
Modulates biological processes related to the treated condition
Provides symptom relief and improves quality of life
Helps manage the underlying condition effectively
Works best when combined with appropriate lifestyle modifications

The medication is designed to target the specific pathways involved in colorectal and breast cancer, making it an effective treatment option.

Common Uses

Primary Indications

Capecitabine is commonly prescribed for:

Colorectal and breast cancer: The main indication for this medication
Related Conditions: Associated symptoms and complications
Prevention: May help prevent progression of certain conditions
Symptom Management: Reduces discomfort and improves daily function

Additional Uses

In some cases, Capecitabine may also be prescribed for:

Off-label uses as determined by your healthcare provider
Combination therapy with other medications
Long-term management of chronic conditions
Short-term treatment of acute symptoms

Dosage and Administration

Capecitabine dosing varies based on the specific condition being treated and individual patient factors.

Typical Dosing:

Starting dose is typically determined by your healthcare provider
May be adjusted based on response and tolerability
Can be taken with or without food (follow specific instructions)
Usually taken once or twice daily

Administration Tips:

Take at the same time(s) each day for best results
Swallow tablets/capsules whole unless instructed otherwise
Don't skip doses
Complete full course of treatment as prescribed
Follow your doctor's specific instructions carefully

Important Safety Information

Who Should Not Take Capecitabine?

Do not take Capecitabine if you:

Are allergic to Capecitabine or any ingredients
Have certain medical conditions (discuss with your doctor)
Are taking medications that interact with Capecitabine
Have severe liver or kidney disease (without dose adjustment)

Drug Interactions

Inform your doctor about all medications you take, including:

Prescription medications
Over-the-counter drugs
Vitamins and supplements
Herbal products

Some medications may interact with Capecitabine, affecting its efficacy or increasing side effect risk.

Pregnancy and Breastfeeding

Pregnancy:

Discuss risks and benefits with your doctor if pregnant or planning pregnancy
May require special monitoring or dose adjustments
Some medications should be avoided during pregnancy

Breastfeeding:

Consult your doctor about safety while breastfeeding
May pass into breast milk
Benefits and risks should be carefully considered

Monitoring and Follow-Up

While taking Capecitabine, your doctor may monitor:

Effectiveness of treatment (symptom improvement)
Side effects or adverse reactions
Laboratory values if applicable
Blood pressure, heart rate, or other vital signs as appropriate
Overall response to therapy

Regular follow-up appointments are important to ensure the medication is working properly and to make any necessary adjustments.

Managing Side Effects

Most side effects are mild and improve with time. Here are strategies for common side effects:

Gastrointestinal Upset

Take with food if allowed
Stay well hydrated
Eat smaller, more frequent meals
Report persistent nausea or vomiting

Dizziness

Rise slowly from sitting or lying positions
Avoid sudden movements
Stay hydrated
Avoid alcohol
Report severe or persistent dizziness

Fatigue

Get adequate rest
Maintain regular sleep schedule
Exercise as tolerated
Report excessive tiredness that interferes with daily activities

Lifestyle Considerations

To maximize the benefits of Capecitabine:

Follow a healthy, balanced diet
Exercise regularly as recommended by your doctor
Maintain a healthy weight
Avoid alcohol or limit consumption
Don't smoke
Manage stress through relaxation techniques
Get adequate sleep
Stay well hydrated
Keep all follow-up appointments
Take medication consistently as prescribed

When to Contact Your Doctor

Seek immediate medical attention if you experience:

Signs of severe allergic reaction (difficulty breathing, severe rash, swelling)
Chest pain or rapid heartbeat
Severe dizziness or fainting
Unusual bleeding or bruising
Signs of liver problems (yellowing of skin/eyes, dark urine, severe fatigue)
Severe stomach pain
Any symptoms that concern you

Contact your doctor for non-emergency issues:

Mild to moderate side effects that persist
Questions about your medication
Concerns about effectiveness
New medications prescribed by another doctor
Scheduled surgery or dental procedures
Planning pregnancy

Storage

Store Capecitabine at room temperature (68-77°F or 20-25°C) away from light, heat, and moisture. Keep in original container. Keep out of reach of children and pets. Do not use past expiration date.

Important Reminders

Take exactly as prescribed by your doctor
Don't stop suddenly without medical advice
Keep all follow-up appointments
Report any unusual symptoms
Don't share medication with others
Store safely away from children
Check expiration dates
Ask your pharmacist if you have questions

Clinical Benefits

When used appropriately, Capecitabine provides several benefits:

Effective management of colorectal and breast cancer
Improvement in quality of life
Reduction in symptoms
Prevention of complications
Generally well-tolerated when used as directed
Backed by clinical research and extensive use

Disclaimer: This information is for educational purposes only and is not intended to replace professional medical advice, diagnosis, or treatment. Always consult your physician or other qualified healthcare provider with any questions about a medical condition or medication.

Frequently Asked Questions

Hand-foot syndrome (palmar-plantar erythrodysesthesia) causes redness, swelling, tingling, numbness, peeling, blistering, or pain on the palms and soles. It affects up to half of patients on capecitabine. Notify your oncology team at the first sign — early dose reduction usually reverses it. Avoid hot water, friction, tight shoes, and prolonged pressure on hands and feet. Topical urea creams, emollients, and cool compresses may help.

Take capecitabine within 30 minutes after a meal, swallowed whole with water. Taking it with food slows absorption and reduces the risk of gastrointestinal side effects. Doses are typically given approximately 12 hours apart (morning and evening). Do not crush, split, or chew tablets, and wash your hands after handling them.

Dihydropyrimidine dehydrogenase (DPD) is the enzyme that breaks down 5-FU. People with partial or complete DPD deficiency cannot clear capecitabine effectively, leading to severe — sometimes fatal — toxicity (mucositis, neutropenia, neurotoxicity). DPD testing (DPYD genotyping) is increasingly recommended before starting therapy. Tell your oncologist about any family history of severe chemotherapy toxicity.

Stop the medication and contact your team for: more than 4 loose stools per day or any nighttime diarrhea; vomiting more than once in 24 hours; mouth sores that prevent eating or drinking; fever of 100.4 °F (38 °C) or higher; significant hand-foot syndrome (blistering, ulceration, severe pain); or chest pain. Early intervention prevents serious complications.

Always check with your oncology team first. Aspirin, NSAIDs, and many herbal supplements (especially St. John wort) can interact with capecitabine or increase bleeding risk. Acetaminophen for fever should not be used to mask infection — fever during chemotherapy is a medical emergency. Loperamide for diarrhea may be recommended by your team but should not be used without their guidance.

Duration depends on the indication. Adjuvant colon cancer treatment is typically 8 cycles (about 6 months). Metastatic disease may be treated as long as it remains effective and tolerable, often re-evaluated every 2–3 cycles with imaging and labs. Your oncologist will base continuation on tumor response, side effects, and your overall functional status.

Questions to Ask Your Doctor

Consider discussing these topics at your next appointment:

✓Should I be tested for DPD deficiency before I start capecitabine?
✓How will my INR be monitored if I need to stay on warfarin?
✓What symptoms should make me hold a dose and call you immediately?
✓How will we measure whether the capecitabine is working, and on what schedule?
✓Are there supportive care options (mouth rinses, urea cream) you would recommend up front?

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Medical Disclaimer: This information is for educational purposes only and should not be considered medical advice. Always consult with your healthcare provider before starting, stopping, or changing any medication. Your doctor can provide personalized recommendations based on your specific health condition and medical history.