Capecel

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Capecel

Medically reviewed

Marina Burgos

Last updated on 10/01/2026

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

Overview of Capecel

Property Description
Active ingredient Capecitabine
Form Film-coated tablets
Pharmacological class Antineoplastic, Antimetabolite
General Use Systemic treatment of malignant neoplasms
Origin Synthetic prodrug (Fluoropyrimidine carbamate)

Classification and Identity: What Type of Medicine is Capecel?

Capecel is a synthetic, prescription-only antineoplastic agent that falls into the pharmacological class of antimetabolites. It is a cytostatic drug, delivered through oral administration in the form of film-coated tablets, and is utilized in the systemic treatment of malignant neoplasms. The active ingredient is Capecitabine (chemical formula C15H22FN3O6). Its classification as an antimetabolite means it interferes with the normal processes of cellular metabolism.

The Unique Role of Capecitabine as a Prodrug

The core differentiating feature of Capecel is its function as an orally administered prodrug, which is an inactive compound that must undergo specific enzymatic changes within the body to become therapeutically active. Capecitabine is classified chemically as a fluoropyrimidine carbamate, which serves as the precursor to the established cytotoxic agent 5-fluorouracil (5-FU). This bioactivation is a sequential, highly selective process that results in a concentration of the active 5-FU at the tumor site itself. This characteristic of generating the active moiety directly at the disease site is a key therapeutic advantage.

General Therapeutic Purpose of Oral Antimetabolites

The general purpose of this medication is to provide a systemic method for controlling the spread and growth of cancer cells. As a nucleoside metabolic inhibitor, Capecitabine, via its active metabolite 5-FU, interferes with the production of crucial genetic material, specifically DNA and RNA, thereby halting the uncontrolled proliferation of disease cells. The drug is characterized by its direct effect on tumor cell growth via this metabolic pathway, as a fundamental chemotherapy agent suitable for an oral regimen.

Regulatory References

  1. NCI Drug Dictionary: Capecitabine
  2. European Medicines Agency (EMA) on Xeloda (Capecitabine)

What side effects are possible with Capecel?

Possible Side Effects and Safety Information

The safety profile of Capecel (Capecitabine) is formally documented in government regulatory labeling, categorizing risks by frequency and the affected body system. This section details officially recognized adverse reactions and specific safety constraints.


Frequency and System-Organ Classes

The most commonly reported adverse reactions are classified as Very Common (occurring in ge10% of patients in clinical trials). Adverse events are grouped by the following system classes:

  • Gastrointestinal Disorders: Very Common events include diarrhea, nausea, vomiting, abdominal pain, and stomatitis (mouth inflammation).
  • Skin and Subcutaneous Tissue Disorders: The most frequent is Palmar-Plantar Erythrodysesthesia Syndrome (Hand-Foot Syndrome), also classified as Very Common.
  • General Disorders: Fatigue and weakness are commonly reported.
  • Hepatobiliary Disorders: Hyperbilirubinemia (increased bilirubin levels) is a Very Common laboratory finding.

Serious Adverse Reactions and Safety Constraints

Official labeling highlights the potential for several serious adverse reactions, which may be life-threatening. These include severe cardiotoxicity (such as myocardial infarction or cardiac arrest), severe cutaneous reactions like Stevens-Johnson Syndrome (SJS), and severe gastrointestinal toxicity leading to dehydration and acute renal failure.

Population-Specific Safety Notes

The use of Capecel is subject to specific constraints for certain populations, as mandated by regulatory authorities:

  • Severe Renal Impairment: Capecel is contraindicated in patients with severe renal impairment (creatinine clearance <30 mL/min).
  • DPD Deficiency: Patients with complete Dihydropyrimidine Dehydrogenase (DPD) deficiency are at a markedly increased risk of severe or fatal toxicity.
  • Pregnancy and Lactation: The medication is classified as Pregnancy Category D. Nursing mothers are advised to discontinue nursing during treatment.

Time-Related Safety Patterns

Regulatory documents note that cardiotoxicity symptoms may often occur within 2–3 days after starting therapy. Severe diarrhea is noted to have a median time to onset of approximately 34 days.

Overdose and Emergency Response

Overdose Manifestations and Required Emergency Actions

Official regulatory documents define the Capecel overdose profile by the potential for acute and severe systemic toxicity. Overdose or overexposure is documented to manifest as the unusually severe, early-onset presentation of expected adverse reactions, including severe diarrhea, mucositis, and palmar-plantar erythrodysesthesia (hand-and-foot syndrome). Severe reactions commonly involve hematologic toxicity (neutropenia) and can lead to life-threatening complications affecting the central nervous system and cardiovascular system, such as cardiac arrest.

Emergency treatment is mandated by regulatory authorities following any confirmed overdose or overexposure, regardless of the presence of symptoms. Immediate medical attention is required because intervention is time-critical. Uridine triacetate is the FDA-approved specific antidote indicated for the emergency treatment of both adult and pediatric patients with overdose or unusually severe toxicity.

The regulatory protocol requires treatment to commence as soon as possible, and within 96 hours of the last dose of Capecel. Supportive management is necessary, and the full 20-dose course of the antidote must be completed, even if symptoms begin to resolve. A significant risk factor is absent DPD activity, which has been officially linked to an increased risk of fatal adverse reactions.

Therapeutic Uses of Capecel

What Capecel Treats: Main Uses and Benefits

Capecel is used in situations involving certain distressing symptoms related to solid tumors, primarily those involving the digestive tract and breast. This medication is relevant in contexts involving heightened systemic burden where a continuous therapeutic approach is appropriate. The medication is commonly used in conditions like the adjuvant setting for Stage III colon cancer, and for advanced or metastatic cancers of the colorectum, stomach, esophagus, and breast. The medication helps ease the overall symptom burden, which supports general well-being during symptomatic phases.

The use in the adjuvant context is relevant for easing the symptoms linked to organ-specific functional stress after initial surgery, by managing the risk of recurrence. The oral formulation assists with maintaining functional stability by providing supportive relief when symptoms interfere with routine activities.

“The treatment is commonly used to help with symptoms related to systemic imbalance and supports patients during episodes of heightened discomfort.”

Quick Fact: Relevant for symptoms related to systemic imbalance

Eligibility and Restrictions for Use

Capecel (Capecitabine) is approved for use in the adult population (age 18 and older) but is subject to strict eligibility rules defined by regulatory authorities.

Contraindicated Populations

The medicine is contraindicated and must not be used in the following groups, as formally stated in regulatory labeling:

  • Patients with a known complete absence of Dihydropyrimidine Dehydrogenase (DPD) activity. This absolute prohibition is due to the high risk of life-threatening toxicity.
  • Patients with severe renal impairment (creatinine clearance below 30 mL/min).
  • Patients with known hypersensitivity to the medicine or its related compound, 5-fluorouracil.
  • Patients receiving co-treatment with sorivudine or chemically related analogues.

Restricted or Conditional Use

Eligibility is restricted for other specific populations:

  • Moderate renal impairment (CrCl 30-50 mL/min): Use is allowed, but the starting dose must be reduced as per regulatory guidance.
  • Age-Based Restrictions: Safety and effectiveness have not been established in the pediatric population (age le 18 years).
  • Reproductive Status: Use is prohibited during pregnancy, and not recommended while breastfeeding.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Capecel's officially documented interaction profile is characterized by mandatory restrictions and clinically significant pharmacokinetic effects.

Co-administration with coumarin-derivative anticoagulants such as Warfarin is a key documented interaction. This combination can lead to altered coagulation parameters, including an increase in INR, and a reported risk of bleeding. Regulatory documents link this effect to the drug or its metabolites being a presumed inhibitor of the CYP2C9 enzyme. Another essential restriction is the formal avoidance of Allopurinol during Capecel treatment, as stipulated in prescribing information.

The interaction with Leucovorin (Folinic Acid) is defined by its outcome of enhanced systemic toxicity due to increased concentration of the active cytotoxic metabolite. This toxicity risk is noted as being heightened in specific patient populations, particularly elderly patients (over 60) receiving the combination. Regarding administration, official regulatory data confirms that the concurrent intake of a meal reduces both the rate and the extent of Capecel absorption. Additionally, individuals with mild-to-moderate hepatic impairment are a population-specific consideration, as they may experience an increased maximum plasma concentration ( C max) of the parent drug.

Mechanism of Action

How Capecel Works: Mechanism of Action

Capecel is an inactive prodrug that undergoes a three-step enzymatic conversion to release the active cytotoxic agent, 5-fluorouracil (5-FU). This activation cascade, completed by the enzyme Thymidine Phosphorylase (TP) , exploits the enzyme's typically elevated levels in specific rapidly dividing cells, resulting in a localized mechanistic outcome.

The mechanism proceeds via a dual attack on cellular processes. A 5-FU metabolite, FdUMP, acts as a false substrate to inhibit the enzyme Thymidylate Synthase (TS), causing a critical depletion of the DNA building block dTMP. Simultaneously, other metabolites corrupt both DNA and RNA by being mistakenly incorporated into their new strands, leading to functional disruption and genetic damage. This molecular interference halts cell division and triggers programmed cell death (apoptosis), which is the principal physiological process for limiting the rate of cell division.

The activity of the drug is physiologically constrained by the enzyme Dihydropyrimidine Dehydrogenase (DPD), which breaks down 5-FU. Variations in DPD activity directly impact systemic concentration, where a deficiency can lead to a more profound cytostatic effect on rapidly dividing cells across various populations.

Dosage and Administration Information

How to Use Capecel

Capecel (Capecitabine) is an oral medication administered in the form of film-coated tablets, available in 150 mg and 500 mg strengths. The medicine is taken as prescribed, adhering to a specific administration schedule.

Dosing and Scheduling Principles

The standard starting dose is individualized and calculated based on the patient’s Body Surface Area (BSA) in mg/m^2. Dosing occurs twice daily (BID), with the morning and evening doses separated by approximately 12 hours. The most common regimen is a 21-day cycle, consisting of 14 consecutive days of dosing followed by a 7-day rest period. Treatment duration may be defined, such as up to 6 months (8 cycles) for adjuvant settings, or continued until a specific treatment endpoint in the metastatic context.

Administration Conditions

For proper utilization, the film-coated tablets must be swallowed whole with water and should not be crushed or chewed. Each dose is consumed within 30 minutes after the end of a meal. If a dose is missed or vomited, an extra dose is not taken; instead, administration resumes with the next regularly scheduled dose.

Population-Specific Dosing

A specific dose reduction is utilized in certain patient groups. For individuals with moderate renal impairment (Creatinine Clearance 30 to 50 mL/min), the starting dose is reduced to 75% of the standard calculated dose. Once a dose is reduced due to treatment effects, it is generally not increased again.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Capecel

The clinical evaluation of Capecel (capecitabine) has involved several large-scale, international studies, primarily Randomized Controlled Trials (RCTs). These trials are designed to compare the medication against an established treatment to examine the types of outcomes that are tracked in specific patient populations. This overview describes the structure of the available evidence without offering clinical guidance or discussing individual expected outcomes.


Evidence for Use in Colorectal Cancer

Research exploring the use of Capecel for colorectal cancer focused on two main settings: advanced disease (metastatic) and studied in the context of disease recurrence after surgery (adjuvant). Large-scale Phase III RCTs compared Capecel, often as a single agent, against IV fluoropyrimidine regimens. Studies monitored outcomes such as Overall Survival (OS) and Time to Disease Progression (TTP). Findings describe patterns observed in the studies where Capecel monotherapy was evaluated against an IV fluoropyrimidine regimen.

The evidence base for colorectal cancer is derived from multiple large-scale trials. However, comparative evidence is lacking for certain combinations against all the most current, complex IV chemotherapy regimens.


Evidence for Use in Gastric and Gastroesophageal Junction Cancers

Capecel was typically evaluated in combination with other chemotherapy agents for advanced disease and in the adjuvant setting. Studies monitored outcomes such as Disease-Free Survival (DFS) and Objective Response Rate (ORR) (a measurement of tumor size change). Research highlights changes measured during the study period, with findings describing patterns where the Capecel-based combination regimens demonstrated patterns of outcomes that were similar to the IV fluoropyrimidine-based combinations they were studied against.

What remains uncertain is the precise role of Capecel monotherapy in the adjuvant setting, as the definitive evidence primarily supports its use as part of a combination regimen.


Evidence for Use in Metastatic Breast Cancer

The evidence for Capecel in metastatic or locally advanced breast cancer (MBC) includes both Phase III RCTs (combination therapy) and smaller Phase II non-comparative trials (single agent). Studies monitored outcomes related to functional imbalance, measuring Objective Response Rate (ORR) and the Time to Progression (TTP) of the disease, often in women whose disease had progressed following prior treatment with specific established agents. The research provides context but not individual predictions.

Frequently Asked Questions (FAQ)

Common questions about Capecel (FAQ)

Q: How quickly does Capecel start to work after I begin taking it?

According to official pharmacokinetic data, the active form of Capecel reaches its highest concentration in the bloodstream approximately two hours after taking a dose. Regulatory documents note that clinical outcomes measured in studies, such as the Time to Disease Progression (TTP), generally occur over a period of several months.

Q: Why is Capecel taken in cycles?

Official dosing schedules define Capecel treatment using cycles, most commonly 21 days with 14 days of dosing followed by a 7-day rest period. The schedule is defined to manage potential side effects and support the recovery of normal, rapidly dividing cells. This cycling regimen balances the intended anti-cancer effect with toxicity management.

Q: What is the biggest difference between Capecel and similar medicines?

A key differentiating feature in official documents is that Capecel is an oral prodrug. This means it is taken as an inactive tablet and is only converted into the active chemotherapy agent, 5-fluorouracil (5-FU), inside the body. This conversion process is described in official documents as being preferential to the tumor site, which is a key therapeutic characteristic.

Q: Are there any long-term side effects associated with Capecel?

Regulatory documents list side effects that were observed during and shortly after clinical trials, but do not provide a defined categorization of risks based on a specific 'long-term' period following treatment completion. Adverse events are typically categorized by frequency and the affected body system during the period of use.

Q: Does Capecel interact with common stomach acid medications (PPIs)?

Official information for healthcare professionals notes reports suggesting that co-administration with proton pump inhibitors (PPIs) may potentially decrease the intended effect of Capecel. Although available data on this interaction are inconsistent, professional information notes this potential interaction is a population-specific consideration when prescribing the drug.

Q: Can Capecel be used in elderly patients?

Regulatory information indicates that studies performed to date have not demonstrated age-specific problems that would generally limit the use of Capecel in the elderly population (age 65 and over). However, specific regulatory guidance notes that careful monitoring and potential dose adjustments may be required due to a higher likelihood of side effects in this group.

Q: Is Capecel ever used for conditions other than cancer?

Capecel is officially approved by regulatory bodies as an antineoplastic agent (a drug used to fight cancer). Its approved use is strictly limited to the systemic treatment of specific malignant neoplasms, including colorectal, gastric, and breast cancers. Official documentation for the product's authorization lists only these specific cancer indications.

Q: Can Capecel affect my liver function?

Official labeling documents note that Capecel can be associated with effects on the liver, primarily an increase in bilirubin levels (hyperbilirubinemia). Rarely, instances of cholestatic hepatitis are reported. Patients with existing hepatic impairment (liver problems) are noted as a population that requires specific consideration.

Q: Why do official sources list so many potential side effects for Capecel?

Regulatory requirements mandate that official drug labeling must comprehensively list adverse reactions that occurred in clinical trials at certain specified frequencies. This principle ensures complete transparency by reporting all observed effects regardless of a definite causal link to the medicine.

Q: Is Capecel considered a targeted therapy?

Capecel is officially classified as an antineoplastic agent in the pharmacological class of antimetabolites, which interfere with cell metabolism. Regulatory documents describe its action as a prodrug that is preferentially converted to the active agent in tumor tissue.

Q: Does Capecel cause changes in mood or confusion?

Adverse events related to the nervous system are included in the officially documented side effects. These may include specific symptoms such as headache, dizziness, and, in rare instances, neurotoxicity that can involve confusion or altered mental status.

Q: Does Capecel treatment require hospitalization?

No. Capecel is provided as an oral medication in film-coated tablets. Because the drug is taken by mouth at home on a scheduled cycle, the standard dosing regimen for administration does not require hospitalization.

Q: How do doctors monitor the effects of Capecel?

Regulatory documents stipulate that careful patient monitoring is recommended, particularly during the first treatment cycle. This monitoring often involves clinical assessment of toxicity and regular laboratory assessments, including checks of various blood cell counts.

Q: Can people who have diabetes use Capecel?

Diabetes is not listed as a formal contraindication in official regulatory documents. Eligibility for using the drug is determined based on overall health status and other specific contraindications, such as the presence of severe kidney or liver impairment.

Q: Does Capecel cause joint or muscle pain?

Yes, musculoskeletal side effects are officially documented in the safety profile of the medicine. These reported effects include reports of pain in extremity or jaw, back pain, myalgia (muscle pain), and arthralgia (joint pain).

Q: How often should the expected side effects be monitored?

Regulatory documents stipulate that careful monitoring for potential toxicities is recommended for all patients, with specific attention directed to the first cycle of treatment. The frequency of monitoring is a decision made by the treating healthcare professional.

Q: What if the side effects of Capecel become severe?

Regulatory guidance for medical professionals states that severe side effects (toxicity) may require specific management, such as the temporary interruption of treatment or a reduction in the prescribed dose. Official guidance notes that treatment may be resumed when the toxicity has resolved or improved to a predefined grade, based on the treating physician’s assessment.

Q: Can men and women use Capecel for the same conditions?

Official indications for Capecel include colorectal cancer and gastric cancer, which are conditions that are not restricted by gender. It is also approved for metastatic breast cancer, which is typically a condition affecting women.

Q: Are there special restrictions on driving or operating machinery while on Capecel?

The drug's safety profile notes that side effects such as dizziness, fatigue, and nausea may occur. Regulatory information advises that these types of effects could potentially impair a person's ability to drive or safely operate machinery.

Q: Is Capecel a maintenance drug or a short-term treatment?

The treatment duration is officially defined based on the condition being treated. For adjuvant settings (early-stage disease), a specific duration, such as six months, is typically established. Use in metastatic contexts is often continued until a specific treatment endpoint is reached.

Q: Why do some people need a genetic test before starting Capecel?

Regulatory guidance addresses the need for DPD (Dihydropyrimidine Dehydrogenase) testing before treatment initiation in certain populations. This is to identify individuals with DPD deficiency who are at a markedly increased risk of severe or potentially fatal toxicity from the drug.

Q: Does Capecel cause a temporary loss of appetite?

Loss of appetite, or anorexia, is included as an adverse event in the regulatory safety documentation. This side effect, along with other gastrointestinal issues like vomiting and diarrhea, is noted as a factor that may contribute to the risk of dehydration.

Q: How does Capecel differ from injected treatments?

Capecel differs primarily in its route of administration: it is an oral tablet taken by mouth. This contrasts with traditional fluoropyrimidine regimens, which are typically administered intravenously (injected).

Q: What does 'use conditions' mean for Capecel?

In regulatory documentation, 'use conditions' refers to the set of requirements defined for the drug's optimal, safe, and effective use. These conditions cover key factors like patient eligibility, the specific administration schedule, and necessary restrictions and contraindications.

Q: Are there specific instructions for what to do if a side effect occurs?

Regulatory guidelines for healthcare providers note that side effects (toxicities) are managed through symptomatic treatment or by modifying the prescribed dose. This management may involve temporary interruption or a permanent reduction of the dose.

How should Capecel be stored and disposed of?

How to Store and Dispose of Capecel?

Capecel (capecitabine) must be stored and handled according to specific regulatory requirements for oral cytotoxic agents.


Storage Conditions

Requirement Official Regulatory Statement
Temperature Store at controlled room temperature, between 20 C and 25 C (68 F to 77 F).
Protection Keep the tablets in a tightly closed container, away from heat, excessive moisture, and freezing.
Packaging Store in the original container and ensure it is kept out of the reach of children and pets.

Disposal and Handling

Capecel requires special disposal protocols. Unused or expired medication must be handled as pharmaceutical waste and should not be flushed down the toilet or thrown in household trash. Patients are directed to return the unused product to an approved drug take-back program or specialized collection site. Caregivers, particularly pregnant or nursing women, must observe handling precautions and should wash their hands before and after preparing the dose.

Attention! Always consult to a doctor or pharmacist before using pills or medicines.

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