Capecitabine (Oral Chemotherapy Medicine) – Patient Information for Australia

Capecitabine is an oral anticancer medicine used to treat several types of cancer. It is taken by mouth and is designed to be converted in the body into an active chemotherapy agent primarily within tumour tissues. This means it can offer a convenient alternative to some intravenous chemotherapy regimens while still delivering effective treatment.

This page explains how capecitabine works, how it is used, what to expect, and important safety and interaction considerations. It is written for patient understanding and general education only.

Basic product information

Important: Doses are individualised based on your cancer type, treatment goals, body surface area or dosing calculations, kidney function, and tolerance. Always follow the dosing instructions provided with your specific treatment plan.

Mechanism of action (how capecitabine works)

Capecitabine is a prodrug, meaning it is converted into its active form inside the body. Its active metabolite is 5-fluorouracil (5-FU).

The process involves several enzymatic steps:

• Capecitabine is absorbed into the bloodstream and converted to intermediates.
• In tumour tissues, higher concentrations of certain enzymes (notably thymidine phosphorylase) help convert the drug into 5-FU more effectively than in healthy tissue.
• 5-FU then interferes with DNA and RNA production in cancer cells.

The result is inhibition of cancer cell growth and replication.

Pharmacokinetics (what the body does to capecitabine)

“Pharmacokinetics” describes how the body absorbs, processes, and eliminates the medicine.

• Absorption: Capecitabine is absorbed after oral administration. Food can influence how quickly it reaches peak levels.
• Distribution: It is processed through the liver and other tissues, producing active metabolites.
• Metabolism: Capecitabine undergoes stepwise conversion to active 5-FU metabolites.
• Elimination: Metabolites are eliminated primarily via the kidneys (urinary excretion contributes significantly).

Kidney function matters: Because elimination involves the kidneys, reduced kidney function may increase exposure and side effects. Your healthcare team may adjust the dose and monitoring schedule accordingly.

Typical uses in cancer treatment

Capecitabine is used for several common solid tumours. The specific indication depends on your diagnosis and treatment plan. In Australia, it may be used in:

• Breast cancer (including in certain settings and combinations as determined by oncology guidelines)
• Colorectal cancer (including advanced/metastatic disease and certain adjuvant scenarios)
• Gastric or gastro-oesophageal cancer (selected cases depending on regimen)

Your oncology team will determine whether capecitabine is appropriate alone or as part of a combination, based on tumour characteristics and treatment goals.

Timing and how to take capecitabine

Capecitabine is typically taken in cycles, often following an “on” and “off” schedule (for example, several days of treatment followed by rest days). The exact schedule varies by the regimen.

General principles

• Follow your schedule exactly. If you miss a dose, do not “double up” unless your clinician or the product instructions specifically advise you to do so.
• Take at the same times each day to maintain consistent dosing.
• Swallow tablets whole with water (unless your instructions say otherwise).
• Do not handle crushed tablets. If tablets are broken or crushed, avoid skin contact and speak to your pharmacist about safe handling.

Relationship with meals

Capecitabine is normally taken with food. Food helps reduce gastrointestinal side effects and supports more predictable absorption.

• Take your morning dose after a meal (breakfast or main meal depending on your schedule).
• Take your evening dose after a meal (dinner or main meal depending on your schedule).

Consistency is key: Try to eat at similar times each day around your doses.

Food interactions

Capecitabine’s absorption and tolerability can be affected by food.

• Take with food as directed. If you usually take it after meals, keep to the same pattern.
• Avoid sudden changes in meal routine during treatment unless your clinician advises otherwise.

If you experience nausea, appetite changes, or vomiting, discuss strategies with your healthcare team. They may recommend symptom-support medicines or adjustments to manage side effects.

Alcohol interactions and safety considerations

There is no single universal “safe” level of alcohol for people taking chemotherapy medicines, but the combination of capecitabine and alcohol may increase risks such as:

• Greater nausea and stomach irritation
• Dehydration, especially if you have diarrhoea
• Higher stress on the liver (relevant because metabolism and safety monitoring may involve liver function)

Practical advice: Many patients are advised to avoid alcohol during chemotherapy, especially if you have diarrhoea, mouth sores, or liver-related lab changes. If you choose to drink, it should be discussed with your oncology team first.

Medicine interactions (important)

Capecitabine can interact with other medicines. Some interactions may change drug levels, increase side effects, or affect how well treatment works.

Always tell your pharmacist and oncologist about all medicines and supplements you take, including:

• Prescription medicines
• Over-the-counter products (including pain relievers and cold/flu medicines)
• Herbal products and supplements
• Vitamins

Common interaction considerations

• Warfarin and other blood thinners: capecitabine can affect bleeding risk. Extra INR monitoring may be required in people taking warfarin.
• Phenytoin: levels may change, requiring monitoring.
• Leucovorin (folinic acid): may be part of some regimens that increase activity and side effects.
• Allopurinol: may influence uric acid and treatment tolerability.
• Antacids: some types can influence absorption; ask your pharmacist for guidance on which product is suitable.
• Other myelosuppressive medicines: combined effects can increase risk of low blood counts.

Because interaction risks can vary, your healthcare team may adjust dosing or add monitoring (such as blood tests) when medicines are combined.

Indications (when capecitabine is used)

In clinical practice, capecitabine is used for:

• Colorectal cancer: including adjuvant treatment after surgery in some circumstances and treatment of advanced disease.
• Breast cancer: in certain settings and treatment combinations.
• Gastric/gastro-oesophageal cancer: selected cases depending on regimen and staging.

Your specific indication and treatment schedule will be determined by your oncologist based on cancer stage, prior therapies, and your overall health.

Dosing overview (what to know)

Dosing for capecitabine is individualised. Clinicians often calculate the dose using body surface area and may also adjust based on:

• Kidney function (creatinine clearance/eGFR)
• Age and overall performance status
• Baseline blood counts
• Tolerance and severity of side effects during earlier cycles

Important: Always follow the exact tablet strength and dose schedule on your treatment plan. Capecitabine tablets come in different strengths, so the number of tablets matters.

Common cycle patterns (general)

• Many regimens use an on-then-off cycle approach (for example, two weeks of treatment followed by a rest week).
• Some regimens may have different schedules or combination partners.

Your oncology team may also pause treatment if you experience significant side effects, and then restart with dose adjustments.

Safety profile (side effects and when to seek help)

Like all chemotherapy medicines, capecitabine can cause side effects. Some are predictable and manageable, while others require prompt medical attention.

Common side effects

• Diarrhoea (can range from mild to severe)
• Nausea and decreased appetite
• Fatigue
• Mouth sores (stomatitis)
• Hand–foot syndrome (palmar-plantar erythrodysaesthesia): redness, swelling, pain, or blistering on palms and soles
• Low blood counts (e.g., neutropenia), which can increase infection risk
• Rash or dry skin

Serious risks (seek urgent medical advice)

Contact your healthcare team promptly or seek urgent care if you experience:

• Fever (often defined as 38°C or higher) or signs of infection, particularly if you have low white blood cells
• Severe diarrhoea or inability to keep fluids down
• Severe mouth sores preventing eating or drinking
• Chest pain, shortness of breath, or unusual heart symptoms
• Severe allergic reactions (swelling of face/lips, difficulty breathing, widespread rash)
• Signs of dehydration (dizziness, very dark urine, fainting)
• Severe hand–foot syndrome (painful blistering, skin breakdown)

Monitoring during treatment

During capecitabine therapy, your clinician typically monitors:

• Blood counts (white cells, red cells, platelets)
• Liver function
• Kidney function
• Treatment response through clinical review and imaging/lab markers as appropriate

Monitoring supports timely dose adjustments to reduce risk.

Practical use tips (daily living while on capecitabine)

These tips may help you manage common effects and stay safer during treatment.

Preventing or reducing diarrhoea

• Stay well hydrated throughout the day.
• Eat gentle foods if your stomach is upset (for example, bland meals).
• Report diarrhoea early—earlier treatment often prevents it from becoming severe.

Managing hand–foot syndrome

• Keep hands and feet moisturised with a suitable emollient.
• Avoid friction and heat on palms/soles (hot water, harsh scrubbing, long walking).
• Wear comfortable, well-fitting shoes and cushioned socks.
• Let your oncology team know at the first signs of redness, tingling, or pain.

Reducing nausea and mouth discomfort

• Take doses after meals as directed, rather than on an empty stomach.
• Use gentle oral care (soft toothbrush, bland rinses if recommended).
• Ask about anti-nausea medicines if nausea occurs.

Infection prevention with low blood counts

• Practice good hand hygiene.
• Avoid close contact with people who are sick.
• Get medical advice promptly for fever or infection symptoms.

Tablet handling and storage

• Store tablets at room temperature in a cool, dry place (follow the label).
• Keep out of reach of children.
• Use gloves if instructed for tablet handling or if tablets are being prepared; otherwise, avoid unnecessary direct contact.

What to do if you miss a dose

Missed doses should be managed based on your specific schedule and clinician’s instructions. In general:

• Do not double the dose to make up for a missed tablet.
• Contact your oncology team or pharmacist for advice on what to do for your situation.

Because capecitabine regimens vary, the safest approach is to follow the guidance provided with your treatment plan.

Alternative options (therapeutic alternatives)

If capecitabine is not suitable or needs to be changed due to side effects or lack of effectiveness, your oncologist may consider alternatives depending on cancer type and stage.

Possible alternatives can include:

• Other fluoropyrimidines (such as intravenous 5-FU or other related agents)
• Different chemotherapy regimens using combinations with other cytotoxic medicines
• Targeted therapies or immunotherapy where appropriate for the specific tumour biology
• Best supportive care when the balance of benefit and side effects changes

Your treating team will select options based on evidence-based guidelines, prior treatment history, tumour markers, and your overall health.

Market and legal context in Australia (what to expect)

In Australia, capecitabine is a regulated medicine and is used under the supervision of oncology services and other qualified healthcare professionals. Supply channels and patient counselling are governed by Australian healthcare and pharmacy regulations.

Key points for patients:

• Medicines are dispensed according to Australian product and prescribing requirements.
• Pharmacists provide counselling on correct administration, side effect management, and interactions.
• Safety monitoring is typically integrated into oncology appointments and blood test schedules.

Availability can vary by strength and supply chain; your pharmacy can advise on ordering timelines and substitute strengths where appropriate and permitted.

Recent guidance and care updates (staying current)

Cancer care and chemotherapy safety guidance evolve as new clinical evidence becomes available. To stay aligned with current practice in Australia:

• Follow the advice of your treating oncology team and the most current local protocol for your cancer type.
• Keep all scheduled blood tests and clinic reviews.
• Report side effects early—dose modifications are often time-sensitive.

If you have concerns about dosing changes, treatment pauses, or new symptoms, contact your oncology team or pharmacist promptly.

Delivery and availability (online pharmacy considerations)

Availability of capecitabine tablets may depend on local stock, tablet strengths, and packaging sizes. With online pharmacy services in Australia, typical expectations include:

• Ordering and dispatch: Many items are dispatched after verification and packaging steps are completed.
• Delivery timeframes: Vary by location and courier service; you may receive tracking details.
• Cold-chain: Capecitabine tablets are generally stored at room temperature, but always follow the storage directions on the label.
• Packaging and privacy: Deliveries are usually packaged to protect product integrity and patient privacy.

If your requested strength is temporarily unavailable, your pharmacist may contact you about options such as alternative stock, timing, or recommended substitutes (where appropriate and permitted).

FAQ: Capecitabine for patients

1) What is capecitabine used for?

Capecitabine is used in the treatment of certain cancers, including colorectal cancer, breast cancer, and gastric/gastro-oesophageal cancer in selected settings. Your oncology team will specify the exact indication and regimen.

2) How do I take capecitabine?

Take capecitabine by mouth as directed in your treatment plan. It is typically taken after meals to improve tolerability and absorption. Follow your prescribed schedule and tablet strength exactly.

3) Can I take it on an empty stomach?

Capecitabine is generally taken with food. If you cannot eat normally, contact your healthcare team for advice rather than changing your dose routine without guidance.

4) What is hand–foot syndrome and how do I manage it?

Hand–foot syndrome is a common side effect involving redness, swelling, pain, or blistering on the palms and soles. Management includes moisturising, avoiding friction and heat, comfortable footwear, and early reporting to your oncology team for possible dose adjustments.

5) What should I do if I get diarrhoea?

Report diarrhoea early. Stay hydrated and follow any anti-diarrhoeal guidance provided by your clinician. Severe diarrhoea or dehydration requires prompt medical assessment.

6) Is it safe to drink alcohol while on capecitabine?

Alcohol may worsen side effects such as nausea and dehydration and may affect liver safety. Many patients are advised to avoid alcohol during treatment. Discuss with your oncology team for personalised guidance.

7) Can capecitabine interact with my other medicines?

Yes. Capecitabine can interact with other medicines, including blood thinners (e.g., warfarin) and certain anti-seizure medicines (e.g., phenytoin). Tell your pharmacist about everything you take, including supplements.

8) What blood tests are needed?

Your clinician typically monitors blood counts, liver function, and kidney function during treatment. These tests help guide safe dosing and detect complications early.

9) What if I miss a dose?

Do not double up. Because regimens vary, contact your oncology team or pharmacist for specific advice on your missed dose.

10) When should I seek urgent help?

Seek urgent medical advice for fever (often ≥38°C), severe diarrhoea, severe mouth sores, chest pain, breathing difficulties, signs of dehydration, or severe hand–foot syndrome.

Summary

Capecitabine is an oral chemotherapy medicine used for several cancers. It works by converting to active 5-fluorouracil in the body, helping to slow cancer cell growth. Because side effects can be significant—especially diarrhoea and hand–foot syndrome—careful adherence to timing with meals, close monitoring, and prompt reporting of symptoms are essential.

If you have questions about taking capecitabine, managing side effects, or checking interactions with your current medicines, speak with your pharmacist or oncology team. They can provide guidance tailored to your regimen and health situation.