Clinically relevant adverse events reported in <5% of patients treated with capecitabine either as monotherapy or in combination with docetaxel that were considered at least remotely related to treatment are shown below; occurrences of each grade 3 and 4 adverse event are provided in parentheses.
|Monotherapy (Metastatic Colorectal Cancer, Adjuvant Colorectal Cancer, Metastatic Breast Cancer)|
|Gastrointestinal:||abdominal distension, dysphagia, proctalgia, ascites (0.1%), gastric ulcer (0.1%), ileus (0.3%), toxic dilation of intestine, gastroenteritis (0.1%)|
|Skin & Subcutan.:||nail disorder (0.1%), sweating increased (0.1%), photosensitivity reaction (0.1%), skin ulceration, pruritus, radiation recall syndrome (0.2%)|
|General:||chest pain (0.2%), influenza-like illness, hot flushes, pain (0.1%), hoarseness, irritability, difficulty in walking, thirst, chest mass, collapse, fibrosis (0.1%), hemorrhage, edema, sedation|
|Neurological:||insomnia, ataxia (0.5%), tremor, dysphasia, encephalopathy (0.1%), abnormal coordination, dysarthria, loss of consciousness (0.2%), impaired balance|
|Metabolism:||increased weight, cachexia (0.4%), hypertriglyceridemia (0.1%), hypokalemia, hypomagnesemia|
|Respiratory:||cough (0.1%), epistaxis (0.1%), asthma (0.2%), hemoptysis, respiratory distress (0.1%), dyspnea|
|Cardiac:||tachycardia (0.1%), bradycardia, atrial fibrillation, ventricular extrasystoles, extrasystoles, myocarditis (0.1%), pericardial effusion|
|Infections:||laryngitis (1.0%), bronchitis (0.2%), pneumonia (0.2%), bronchopneumonia (0.2%), keratoconjunctivitis, sepsis (0.3%), fungal infections (including candidiasis) (0.2%)|
|Musculoskeletal:||myalgia, bone pain (0.1%), arthritis (0.1%), muscle weakness|
|Blood & Lymphatic:||leukopenia (0.2%), coagulation disorder (0.1%), bone marrow depression (0.1%), idiopathic thrombocytopenia purpura (1.0%), pancytopenia (0.1%)|
|Vascular:||hypotension (0.2%), hypertension (0.1%), lymphoedema (0.1%), pulmonary embolism (0.2%), cerebrovascular accident (0.1%)|
|Psychiatric:||depression, confusion (0.1%)|
|Renal:||renal impairment (0.6%)|
|Hepatobiliary:||hepatic fibrosis (0.1%), hepatitis (0.1%), cholestatic hepatitis (0.1%), abnormal liver function tests|
|Immune System:||drug hypersensitivity (0.1%)|
|Capecitabine In Combination With Docetaxel (Metastatic Breast Cancer)|
|Gastrointestinal:||ileus (0.4%), necrotizing enterocolitis (0.4%), esophageal ulcer (0.4%), hemorrhagic diarrhea (0.8%)|
|Neurological:||ataxia (0.4%), syncope (1.2%), taste loss (0.8%), polyneuropathy (0.4%), migraine (0.4%)|
|Cardiac:||supraventricular tachycardia (0.4%)|
|Infection:||neutropenic sepsis (2.4%), sepsis (0.4%), bronchopneumonia (0.4%)|
|Blood & Lymphatic:||agranulocytosis (0.4%), prothrombin decreased (0.4%)|
|Vascular:||hypotension (1.2%), venous phlebitis and thrombophlebitis (0.4%), postural hypotension (0.8%)|
|Renal:||renal failure (0.4%)|
|Hepatobiliary:||jaundice (0.4%), abnormal liver function tests (0.4%), hepatic failure (0.4%), hepatic coma (0.4%), hepatotoxicity (0.4%)|
|Immune System:||hypersensitivity (1.2%)|
The following adverse reactions have been observed in the postmarketing setting: hepatic failure, lacrimal duct stenosis, acute renal failure secondary to dehydration including fatal outcome [see Warnings and Precautions (5.5)] , cutaneous lupus erythematosus, corneal disorders including keratitis, toxic leukoencephalopathy, severe skin reactions such as Stevens-Johnson Syndrome and Toxic Epidermal Necrolysis (TEN) [see Warnings and Precautions (5.7)] , persistent or severe hand-and-foot syndrome can eventually lead to loss of fingerprints [see Warnings and Precautions (5.7)]
In instances of exposure to crushed capecitabine tablets, the following adverse reactions have been reported: eye irritation and swelling, skin rash, diarrhea, paresthesia, headache, gastric irritation, vomiting, and nausea.
Altered coagulation parameters and/or bleeding have been reported in patients taking capecitabine concomitantly with coumarin-derivative anticoagulants such as warfarin and phenprocoumon [see Boxed Warning]. These events 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. In a drug interaction study with single dose warfarin administration, there was a significant increase in the mean AUC of S-warfarin [see Clinical Pharmacology (12.3)]. The maximum observed INR value increased by 91%. This interaction is probably due to an inhibition of cytochrome P450 2C9 by capecitabine and/or its metabolites.
The level of phenytoin should be carefully monitored in patients taking capecitabine and phenytoin dose may need to be reduced [see Dosage and Administration (2.3)]. Postmarketing reports indicate that some patients receiving capecitabine and phenytoin had toxicity associated with elevated phenytoin levels. Formal drug-drug interaction studies with phenytoin have not been conducted, but the mechanism of interaction is presumed to be inhibition of the CYP2C9 isoenzyme by capecitabine and/or its metabolites.
The concentration of 5-fluorouracil is increased and its toxicity may be enhanced by leucovorin. Deaths from severe enterocolitis, diarrhea, and dehydration have been reported in elderly patients receiving weekly leucovorin and fluorouracil.
Other than warfarin, no formal drug-drug interaction studies between capecitabine and other CYP2C9 substrates have been conducted. Care should be exercised when capecitabine is coadministered with CYP2C9 substrates.
Concomitant use with allopurinol may decrease concentration of capecitabine’s active metabolites [see Clinical Pharmacology (12.3)] , which may decrease capecitabine tablets efficacy. Avoid the use of allopurinol during treatment with capecitabine tablets.
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