Capecitabine (Capecitabine tablets) — Patient Guide (UK)

Capecitabine is an oral anticancer medicine used to treat certain solid tumours. It belongs to a group of medicines called fluoropyrimidines. This guide explains how capecitabine works, how it is taken, what to expect, common side effects, important interactions, and practical advice for safer use in the United Kingdom.

Always follow the advice of your oncology team. Information on this page is designed to help you understand the medicine and prepare for treatment.

Basic product information

• Generic name: Capecitabine
• Medicinal type: Anticancer (cytotoxic) medicine
• How it’s taken: Swallowed tablets (oral chemotherapy)
• Common tablet strengths: Vary by brand/manufacturer (your pack will show exact strength)
• How it works in the body: Converted to 5-fluorouracil (5-FU) mainly in tumour tissue
• Regulatory status in the UK: Used within National Health Service (NHS) and private care settings for approved indications (see “Indications”)

How capecitabine works (mechanism of action)

Capecitabine is a “prodrug” of 5-fluorouracil (5-FU). A prodrug is a medicine that is converted into an active form inside the body.

After you take capecitabine, enzymes in the body convert it step-by-step into 5-FU. A key feature is that the conversion tends to occur more in tumour tissues, where higher levels of activating enzymes are present. Once 5-FU is formed, it interferes with how cancer cells make DNA and RNA, which slows down their growth and ability to divide.

• Inhibits nucleotide synthesis: Disrupts key steps needed to build DNA
• Misincorporation into RNA/DNA: Can impair the “instructions” cancer cells use to grow
• Results: Reduced tumour growth and, in some cases, tumour shrinkage

Pharmacokinetics (how the body handles the medicine)

“Pharmacokinetics” describes absorption, distribution, metabolism, and elimination. Understanding this can help explain timing, food effects, and why certain interactions matter.

• Absorption: Capecitabine is absorbed through the gastrointestinal tract after swallowing.
• Conversion to active drug: It undergoes enzymatic conversion to intermediate metabolites and then to 5-FU.
• Metabolism: Metabolised primarily in the liver and tissues; enzymes involved in activation and breakdown play an important role.
• Elimination: Metabolites are eliminated mainly via the kidneys (urine).
• Clinical implication: Kidney function can affect how the medicine is cleared; dose adjustments may be needed.

Your prescriber may tailor your dose and schedule based on tumour type, treatment goal, body surface area or weight, blood counts, and kidney/liver function.

Typical use in the UK

Capecitabine is used in the treatment of several cancers, either:

• As a single agent (for some regimens)
• In combination with other anticancer medicines (for certain stages or tumour types)
• Before surgery or radiotherapy in some situations (neoadjuvant approaches)
• After surgery to reduce recurrence risk in suitable patients (adjuvant approaches)

The exact plan—dose, cycle length, and duration—depends on the indication and clinical protocol used by your oncology team.

Indications (what capecitabine is used for)

In the UK, capecitabine is used for approved indications which may include:

• Breast cancer: Capecitabine may be used for metastatic breast cancer in certain circumstances and may form part of other treatment strategies.
• Colorectal cancer: It may be used in metastatic colorectal cancer and in some adjuvant settings.
• Gastric cancer: It may be used in specific settings, often guided by oncologist protocols.
• Other solid tumours: Use depends on the most current UK guidance and the patient’s clinical situation.

Indications can differ slightly depending on local NHS protocols and the licence details of the product supplied. Your oncology team can confirm whether capecitabine is being used as standard care for your diagnosis or within a specific regimen.

Dosing and timing (how to take it safely)

Capecitabine dosing is commonly calculated by body surface area and given in cycles. Many schedules are based on taking tablets for a set number of days followed by a rest period.

A frequent pattern (but not the only possible schedule) is:

• Twice daily dosing (morning and evening)
• Days on treatment followed by a rest period
• Cycles repeated depending on response and tolerability

Timing with meals

Capecitabine is usually taken within a specific time window relative to food:

• Take it after food (often described as within 30 minutes after a meal)
• Try to take doses at consistent times each day to maintain steadier exposure

Swallowing instructions

• Swallow tablets whole with water.
• Do not crush or chew unless your healthcare team specifically instructs otherwise.
• If you experience trouble swallowing, contact your oncology team—there may be alternatives or management strategies.

If you miss a dose

If you miss a dose, do not double up. Contact your oncology team for advice on what to do next. Guidance can vary depending on timing and your cycle schedule.

Stopping temporarily and dose changes

Capecitabine treatment often involves dose modifications to manage side effects such as hand-foot syndrome, diarrhoea, or low blood counts. Do not adjust your dose unless your prescriber has advised it.

Food interactions (what to know about meals)

Food can influence how capecitabine is absorbed. To reduce variability:

• Take capecitabine after a meal and maintain a consistent routine.
• If your appetite is reduced or you struggle to eat, speak to your oncology team—managing nutrition can help treatment continue safely.

Avoid sudden changes in eating patterns during the first days of a cycle without discussing it with your team.

Alcohol and medicine interactions

Alcohol

There is no single “safe” amount of alcohol that applies to everyone during capecitabine treatment. Alcohol may:

• worsen dehydration (which can aggravate diarrhoea)
• increase fatigue
• affect liver metabolism in some people
• raise the risk of interactions if other medicines are used

In practice, many patients are advised to limit alcohol or avoid it during active chemotherapy—especially if you have diarrhoea, mouth ulcers, or abnormal liver tests. Ask your oncology team what applies to your situation.

Medicine interactions (important examples)

Tell your healthcare team about all medicines you take, including over-the-counter products, herbal remedies, and supplements. Some interactions may affect capecitabine levels or increase toxicity. Examples include:

• Anticoagulants (e.g., warfarin): may increase bleeding risk. Monitoring of clotting may be needed.
• Phenytoin: may affect drug levels; monitoring may be needed.
• Leucovorin (folinic acid) and other chemotherapy agents: may intensify effects and toxicity in some regimens.
• Drugs that affect liver enzymes: could alter metabolism (your clinician can advise based on your medication list).
• Other medications causing diarrhoea or low blood counts: may compound side effects.

Also consider interactions with anti-nausea medicines, acid-suppressing medicines, and antibiotics. Your pharmacist can help check your full list.

Safety profile (common and serious side effects)

Like all anticancer medicines, capecitabine can cause side effects. Many are manageable, especially with early reporting. However, some require urgent medical attention.

Common side effects

• Hand-foot syndrome (palmar-plantar erythrodysaesthesia): redness, swelling, pain, or peeling of palms/soles
• Diarrhoea and stomach discomfort
• Nausea and reduced appetite
• Mouth sores (stomatitis)
• Fatigue and weakness
• Rash or skin changes
• Low blood counts: increased infection risk (neutropenia), anaemia, or bruising/bleeding tendencies
• Abnormal liver function tests (found on blood tests)

Serious side effects — seek urgent advice

Contact your urgent care team or seek emergency help if you develop:

• Fever (especially if you are at risk of low white blood cells)
• Severe or persistent diarrhoea or signs of dehydration
• Severe mouth ulcers affecting eating or drinking
• Shortness of breath, chest pain, or unusual heart symptoms
• Uncontrolled vomiting
• Black/tarry stools or vomiting blood (possible bleeding)
• Allergic reaction (swelling of face/lips, wheezing, severe rash)

Monitoring during treatment

Blood tests and clinical checks are typically used to monitor:

• Full blood count (white cells, haemoglobin, platelets)
• Kidney function
• Liver function
• Electrolytes if you have significant diarrhoea
• Symptom checks for diarrhoea, hand-foot syndrome, and infections

Practical use tips (day-to-day support)

Reducing risk of hand-foot syndrome

• Keep hands and feet well moisturised using a plain moisturiser (ask your pharmacist which products to choose).
• Avoid friction and heat (hot baths/showers, tight shoes, vigorous exercise of hands/feet).
• Report early symptoms—early management can reduce severity.

Managing diarrhoea

• Start antidiarrhoeal medication as advised by your team at the first sign of diarrhoea.
• Keep well hydrated (small frequent sips can help if appetite is poor).
• Avoid alcohol and consider limiting very fatty/spicy foods if advised.

Oral care for mouth sores

• Use a gentle toothbrush and avoid harsh mouthwashes unless recommended.
• Maintain good hydration and soft foods if mouth discomfort occurs.
• Seek advice early—treatments are available to help.

Nutrition and energy

• Choose calorie and protein-rich foods when possible.
• Small frequent meals may be easier than large portions.
• Tell your team about weight loss or inability to eat—support may include dietitian advice.

Keeping safe around chemotherapy medicines

• Handle tablets carefully. If tablets are broken, crushed, or spilled, avoid direct contact; follow local guidance on cytotoxic medicines.
• Wash hands after handling tablets.
• Keep medicines out of reach of children and pets.

Practical guidance on dose adjustments and missed tablets

Treatment plans often include dose adjustments for safety. Changes may be triggered by:

• Severe diarrhoea
• Moderate to severe hand-foot syndrome
• Low blood counts
• Kidney impairment or other lab changes
• Infections or complications

If you are unsure how to handle a missed dose, contact your oncology team or pharmacist. Taking more than prescribed can increase toxicity.

Alternative options (depending on cancer type and treatment stage)

Alternative treatments vary widely based on cancer diagnosis, stage, molecular markers, previous therapies, and patient factors. Your oncology team may consider options such as:

• Other oral fluoropyrimidines (in some settings)
• Intravenous 5-FU or other chemotherapy regimens (depending on protocol)
• Combination chemotherapy regimens using different classes of medicines
• Targeted therapies where molecular testing indicates benefit
• Immunotherapy for suitable tumours and biomarker profiles
• Supportive care only when goals of care focus on symptom management

If capecitabine is not suitable due to side effects or medical reasons, your team may propose an alternative regimen. Discuss concerns early—there are often workable options.

UK market and legal context (availability and prescribing framework)

In the United Kingdom, capecitabine is regulated and supplied through pharmacy supply chains that support NHS and private healthcare. Medicines used for anticancer therapy are subject to strict governance including:

• Licensed indications and product-specific information
• Pharmacovigilance systems for monitoring side effects
• Professional prescribing and dispensing standards
• Storage and handling requirements for cytotoxic medicines

In many cases, anticancer oral medicines are dispensed with structured counselling and monitoring plans to support safe use during treatment cycles.

If you’re purchasing through an online pharmacy, the service should provide clear information about: product strength, manufacturer, batch/expiry details, and safe storage instructions.

Recent guidance and clinical practice notes (UK-focused)

Cancer treatment recommendations are updated over time based on evidence and guidance from clinical bodies. While specific schedules for capecitabine depend on the tumour type and protocol, general practice in the UK commonly emphasises:

• Early symptom reporting to prevent severe toxicity
• Routine blood test monitoring during each cycle
• Prompt management of diarrhoea and skin toxicity
• Renal function assessment before and during treatment
• Careful review of medicine interactions (especially anticoagulants)

Your oncology team may also recommend supportive medications (such as anti-diarrhoeal or mouth care products) based on your risk profile.

Delivery and availability (online pharmacy experience in the UK)

Availability can vary by tablet strength and manufacturer. When supplied via an online pharmacy, a reputable service typically offers:

• Clear product identification (strength and packaging information)
• Delivery tracking and reliable estimated delivery times
• Secure packaging to protect tablets during transit
• Temperature-appropriate handling based on product labelling
• Customer support to answer questions about usage and side effects

Delivery times may be impacted by stock availability and courier schedules. If you need medication for a specific start date, order as early as possible and allow extra time for processing.

Storage and safe handling

• Store at the temperature stated on the product packaging.
• Keep in the original container to protect from moisture and to help track batch and expiry.
• Keep out of sight and reach of children.
• If tablets become damaged, do not take them—ask your pharmacist how to dispose or handle them safely.

FAQ — Capecitabine

1) What is capecitabine used for?

Capecitabine is used to treat certain cancers, including some cases of breast, colorectal, and gastric cancers. The exact use depends on your diagnosis and your treatment protocol.

2) How do I take capecitabine?

Follow your treatment schedule exactly. Capecitabine is usually taken twice daily after food, with doses spaced about 12 hours apart when possible. Swallow tablets whole with water.

3) Can I take capecitabine with food?

It is generally intended to be taken after meals to support consistent absorption. Avoid taking it on a completely empty stomach unless your clinician specifically advises otherwise.

4) What should I do if I vomit after taking a dose?

Do not automatically take an extra dose. Contact your oncology team or pharmacist for specific advice based on timing and your regimen.

5) What are the most common side effects?

Common effects include diarrhoea, nausea, fatigue, mouth sores, rash, and hand-foot syndrome. Low blood counts may also occur, which is why regular blood tests are important.

6) When should I seek urgent help?

Seek urgent advice if you develop fever, severe diarrhoea, signs of dehydration, uncontrolled vomiting, chest pain, severe mouth ulcers, bleeding, or symptoms of an allergic reaction.

7) Does capecitabine interact with warfarin?

Capecitabine can increase bleeding risk when used with warfarin. Close monitoring and medication review are commonly required.

8) Can I drink alcohol during treatment?

It’s usually best to limit alcohol or avoid it during chemotherapy. Alcohol may worsen dehydration and fatigue and can complicate side effects. Ask your oncology team for personal guidance.

9) How long does a course last?

Treatment is given in cycles. Each cycle length depends on the regimen your team uses, and it may continue for several months depending on response and tolerability.

10) Are there alternatives if I can’t tolerate capecitabine?

Yes. Alternatives depend on your cancer type and stage and may include other chemotherapy agents, different dosing schedules, targeted therapies, immunotherapy, or supportive care.

Summary table (quick reference)

Important: This information is for general understanding. Your oncology team may provide additional instructions tailored to your specific cancer type, blood test results, kidney function, and previous treatment history.