| Epirubicin should only be administered under the supervision of a qualified physician who is experienced in the use of chemotherapeutic agents. Diagnostic and treatment facilities should be readily available for management of therapy and possible complications due to myelosuppression, especially following treatment with higher doses of epirubicin. Careful baseline monitoring of various laboratory parameters and cardiac function should precede initial treatment with epirubicin. Patients should recover from acute toxicities (such as stomatitis, neutropenia, thrombocytopenia and generalised infections) of prior cytotoxic treatment before beginning treatment with epirubicin.While treatment with high doses of epirubicin (e.g., 90 mg/m2 every 3 to 4 weeks) causes adverse events generally similar to those seen at standard doses (< 90 mg/m2 every 3 to 4 weeks), the severity of the neutropenia and stomatitis/mucositis may be increased. Treatment with high doses of epirubicin requires special attention for possible clinical complications due to profound myelosuppression.Cardiac Function - Cardiotoxicity is a risk of anthracycline treatment that may be manifested by early (i.e. acute) or late (i.e. delayed) events. Early (i.e. Acute) Events: Early cardiotoxicity of epirubicin consists mainly of sinus tachycardia and/or electrocardiogram (ECG) abnormalities such as non-specific ST-T wave changes. Tachyarrhythmias, including premature ventricular contractions, ventricular tachycardia and bradycardia, as well as atrioventricular and bundle-branch block have also been reported. These effects do not usually predict subsequent development of delayed cardiotoxicity. The effects are rarely considered for clinical significance and are generally not taken as indications to discontinue treatment with epirubicin.Late (i.e. Delayed) Events: Delayed cardiotoxicity usually develops late in the course of therapy with epirubicin or within 2 to 3 months after treatment termination, but later events (several months to years after completion of treatment) have also been reported. Delayed cardiomyopathy induced by anthracyclines is associated with persistent reduction of the QRS voltage, prolongation beyond normal limits of the systolic interval (PEP/LVET) and a reduction of the left ventricular ejection fraction (LVEF). Other signs and symptoms that have been reported include congestive heart failure (CHF) such as dyspnoea, pulmonary oedema, dependent oedema, cardiomegaly and hepatomegaly, oliguria, ascites, pleural effusion and gallop rhythm. Life-threatening CHF is the most severe form of anthracycline-induced cardiomyopathy and represents the cumulative dose-limiting toxicity of the drug. The risk of developing CHF is increased in those patients who receive higher cumulative doses of epirubicin in excess of 900 mg/m2. Given the risk of cardiomyopathy, this cumulative dose should only be exceeded with extreme caution (see section 5.1).Heart failure may appear several weeks after discontinuing epirubicin therapy and may be unresponsive to specific medical treatment.Cardiac function should be assessed in patients prior to undergoing treatment with epirubicin and must be continuously monitored during the course of treatment to minimise the risk of incurring severe cardiac impairment. The risk may be reduced with the prompt termination of epirubicin at the first sign of impaired function by regularly monitoring the LVEF during the course of treatment.The appropriate quantitative method for repeated assessment of cardiac function (evaluation of LVEF) includes multi-gated radionuclide angiography (MUGA) or echocardiography (ECHO). A baseline cardiac evaluation with an ECG and a MUGA scan or either an ECHO is recommended, particularly in those patients with risk factors for increased cardiotoxicity. Repeated MUGA or ECHO determinations of LVEF should be performed particularly for those patients who receive higher cumulative anthracycline doses. The technique used in the evaluation for cardiac function should be consistent throughout the follow-up.The potential risk of cardiotoxicity may increase in those patients who exhibit active or dormant cardiovascular disease, and in those who received previous or concomitant radiotherapy to the mediastinal/ pericardial areas. This includes previous therapy with other anthracyclines or anthracenediones, and the concomitant use of other drugs with the ability to suppress cardiac contractility or cardiotoxic drugs (e.g., trastuzumab) (see section 4.5). Cardiac function monitoring must be assessed in patients receiving higher cumulative doses and in those with risk factors. However, cardiotoxicity may occur following lower cumulative doses of epirubicin whether or not cardiac risk factors have been identified. It is probable that the toxicity of epirubicin and other anthracyclines or anthracenediones is additive.Haematologic Toxicity - As with other cytotoxic agents, epirubicin may produce myelosuppression. Haematologic profiles should be assessed both before and during each cycle of therapy with epirubicin, including differential white blood cell (WBC) counts, red blood cell, neutrophil and platelet counts. A dose-dependent, reversible leucopenia and/or granulocytopenia (neutropenia) is the predominant manifestation of epirubicin haematologic toxicity and is the most common acute dose-limiting toxicity of this drug. Leucopenia and neutropenia are generally more severe with high-dose schedules, reaching a nadir in most cases between days 10 and 14 following drug administration. However, this is usually transient with the WBC/neutrophil counts returning to normal values in most cases by day 21. Thrombocytopenia (<100,000 platelets/mm3) is reported in very few patients and anaemia may also occur. Clinical consequences of severe myelosuppression include fever, infection, sepsis/septicemia, septic shock, haemorrhage, tissue hypoxia, or death.Secondary Leukemia - Secondary leukemia, with or without a preleukemic phase has been reported in patients treated with anthracyclines, including epirubicin. Secondary leukemia is more common when such drugs are given in combination with DNA-damaging antineoplastic agents or in combination with radiation treatment, or patients have been heavily pre-treated with cytotoxic drugs, or when doses of the anthracyclines have been escalated. This type of leukemia can have a 1 to 3-year latency period. (See section 5.1).Gastrointestinal - Epirubicin is emetogenic. Mucositis/stomatitis generally appears early after drug administration and, if severe, may progress over a few days to mucosal ulcerations. Most patients recover from this adverse event by the third week of therapy.Liver Function - The major route of elimination of epirubicin is the hepatobiliary system. Therefore serum total bilirubin and alkaline phosphatise levels (AST and ALT) should be evaluated prior to initiating treatment and during the course of treatment. Patients with elevated bilirubin or AST levels may experience slower clearance of epirubicin, which may lead to an increased toxicity. For those patients a lower dose is recommended (see sections 4.2 and 5.2). Patients with severe hepatic impairment should not be treated with epirubicin (see section 4.3).Renal Function - For patients with reduced renal function serum creatinine levels should be assessed prior to and during therapy. For those patients with increased serum creatinine levels (> 5 mg/dL) a dosage reduction is necessary (see section 4.2).Epirubicin may impart a red colour to the urine for one or two days following administration. Effects at Site of Injection - Phlebosclerosis may result from an injection into a small vessel or from repeated injections into the same vein. Following the recommended administration procedures may minimise the risk of phlebitis/thrombophlebitis at the injection site (see section 4.2).Extravasation - Extravasation of epirubicin from the vein during intravenous administration may cause local pain, severe tissue lesions (vesication, severe cellulitis) and necrosis. Venous sclerosis may result from injection into small vessels or repeated injections into the same vein.Should signs or symptoms of extravasation occur during intravenous administration of epirubicin, the drug infusion should be immediately discontinued. The patient's pain may be relieved by cooling down the area and keeping it cool for 24 hours. The patient should be monitored closely during the subsequent period of time, as necrosis may occur several weeks after extravasation occurs. A plastic surgeon should be consulted with a view to possible excision.Other - As with other cytotoxic agents, thrombophlebitis and thromboembolic phenomena, including pulmonary embolism (in some cases fatal), have been coincidentally reported with the use of epirubicin.Tumour-Lysis Syndrome - Epirubicin may induce hyperuricaemia because of the extensive purine catabolism that accompanies the rapid drug-induced lysis of neoplastic cells (tumour-lysis syndrome). Blood uric acid levels, potassium, calcium phosphate and creatinine levels should therefore be evaluated after initial treatment. Hydration, urine alkalinisation, and prophylaxis with allopurinol to prevent hyperuricemia may minimise potential complications of tumour-lysis syndrome. Immunosuppressant Effects/Increased Susceptibility to Infections - Administration of live or live-attenuated vaccines in patients immunocompromised by chemotherapeutic agents including epirubicin, may result in serious or fatal infections (see section 4.5).Reproductive system - Epirubicin can cause genotoxicity. Men and women treated with epirubicin should adopt appropriate contraceptive methods. Patients desiring to have children after completion of therapy should be advised to obtain genetic counselling if appropriate and available.Additional Warnings and Precautions for Other Routes of Administration Intravesical route - Administration of epirubicin may produce symptoms of chemical cystitis (such as dysuria, polyuria, nocturia, stranguria, haematuria, bladder discomfort, necrosis of the bladder wall) and bladder constriction. Special attention is required for catheterisation problems (e.g., uretheral obstruction due to massive intravesical tumours).Intra-arterial route - Intra-arterial administration of epirubicin (transcatheter arterial embolisation for the localised or regional therapies of primary hepatocellular carcinoma or liver metastases) may produce (in addition to systemic toxicity qualitatively similar to that observed following intravenous administration of epirubicin) localised or regional events which include gastro-duodenal ulcers (probably due to reflux of the drugs into the gastric artery) and narrowing of bile ducts due to drug-induced sclerosing cholangitis. This route of administration can lead to widespread necrosis of the perfused tissue and is not recommended. | |