warnings and cautions
5 WARNINGS AND PRECAUTIONS Schedule-Dependent Toxicity: Increased toxicity with infusion time greater than 60 minutes or dosing more frequently than once weekly. ( 5.1 ) Myelosuppression: Monitor for myelosuppression prior to each cycle and reduce or withhold dose for severe myelosuppression. ( 5.2 , 5.8 ) Severe Cutaneous Adverse Reactions (SCARs): Permanently discontinue Gemcitabine for Injection if SCARs occur. ( 5.3 ) Pulmonary Toxicity and Respiratory Failure: Discontinue Gemcitabine Injection for unexplained dyspnea or other evidence of severe pulmonary toxicity. ( 5.4 ) Hemolytic Uremic Syndrome (HUS): ): Monitor renal function prior to initiation and during treatment. Discontinue Gemcitabine Injection for HUS or severe renal impairment. ( 5.5 ) Hepatic Toxicity: Monitor hepatic function prior to initiation and during treatment. Discontinue Gemcitabine Injection for severe hepatic toxicity. ( 5.6 ) Embryo-Fetal Toxicity: Can cause fetal harm. Advise females and males of reproductive potential to use effective contraception. ( 5.6 , 8.1 ) Exacerbation of Radiation Therapy Toxicity: May cause severe and life-threatening toxicity when administered during or within 7 days of radiation therapy. ( 5.8 ) Capillary Leak Syndrome: Discontinue Gemcitabine Injection. ( 5.9 ) Posterior Reversible Encephalopathy Syndrome (PRES): Discontinue Gemcitabine Injection. ( 5.10 ) 5.1 Schedule-Dependent Toxicity In clinical trials evaluating the maximum tolerated dose of gemcitabine, prolongation of the infusion time beyond 60 minutes or more frequent than weekly dosing resulted in an increased incidence of clinically significant hypotension, severe flu-like symptoms, myelosuppression, and asthenia. The half-life of gemcitabine is influenced by the length of the infusion [see Clinical Pharmacology ( 12.3 )] . Refer to the recommended Gemcitabine Injection dosage [see Dosage and Administration ( 2.1 , 2.2 , 2.3 , 2.4 )]. 5.2 Myelosuppression Myelosuppression manifested by neutropenia, thrombocytopenia, and anemia occurs with gemcitabine as a single agent and the risks are increased when gemcitabine is combined with other cytotoxic drugs. In clinical trials, Grade 3-4 neutropenia, anemia, and thrombocytopenia occurred in 25%, 8%, and 5%, respectively of the 979 patients who received single agent gemcitabine. The frequencies of Grade 3-4 neutropenia, anemia, and thrombocytopenia varied from 48% to 71%, 8% to 28%, and 5% to 55%, respectively, in patients receiving gemcitabine in combination with another drug [see Adverse Reactions ( 6.1 )] . Prior to each dose of Gemcitabine Injection, obtain a complete blood count (CBC), with a differential and a platelet count. Modify the Gemcitabine Injection dosage as recommended [see Dosage and Administration ( 2.1 , 2.2 , 2.3 , 2.4 )] . 5.3 Severe Cutaneous Adverse Reactions (SCARs) SCARs, including Stevens-Johnson syndrome (SJS), toxic epidermal necrolysis (TEN), drug reaction with eosinophilia and systemic symptoms (DRESS), and acute generalized exanthematous pustulosis (AGEP), which can be lifethreatening or fatal, have been reported in association with gemcitabine treatment [see Adverse Reactions ( 6.2 )] . Monitor patients for signs and symptoms of severe cutaneous adverse reactions. Permanently discontinue gemcitabine in patients who develop SCARs. 5.4 Pulmonary Toxicity and Respiratory Failure Pulmonary toxicity, including interstitial pneumonitis, pulmonary fibrosis, pulmonary edema, and adult respiratory distress syndrome (ARDS), has been reported. In some cases, these pulmonary events can lead to fatal respiratory failure despite the discontinuation of therapy. The onset of pulmonary symptoms may occur up to 2 weeks after the last dose of gemcitabine [see Adverse Reactions ( 6.1 , 6.2 )] . Permanently discontinue Gemcitabine Injection in patients who develop unexplained dyspnea, with or without bronchospasm, or evidence of severe pulmonary toxicity. 5.5 Hemolytic Uremic Syndrome Hemolytic uremic syndrome (HUS), including fatalities from renal failure or the requirement for dialysis, can occur with gemcitabine. In clinical trials, HUS occurred in 0.25% of 2429 patients. Most fatal cases of renal failure were due to HUS [see Adverse Reactions ( 6.1 )] . Serious cases of thrombotic microangiopathy (TMA) other than HUS have been reported with gemcitabine [see Adverse Reactions ( 6.2 )] . Assess renal function prior to initiation of Gemcitabine Injection and periodically during treatment. Consider the diagnosis of HUS in patients who develop anemia with evidence of microangiopathic hemolysis; increased bilirubin or LDH; reticulocytosis; severe thrombocytopenia; or renal failure (increased serum creatinine or BUN). Permanently discontinue Gemcitabine Injection in patients with HUS or severe renal impairment. Renal failure may not be reversible even with the discontinuation of therapy. 5.6 Hepatic Toxicity Drug-induced liver injury, including liver failure and death, has been reported in patients receiving gemcitabine alone or with other potentially hepatotoxic drugs [see Adverse Reactions ( 6.1 , 6.2 )] . Administration of gemcitabine in patients with concurrent liver metastases or a pre-existing medical history of hepatitis, alcoholism, or liver cirrhosis can lead to exacerbation of the underlying hepatic insufficiency. Assess hepatic function prior to initiation of Gemcitabine Injection and periodically during treatment. Permanently discontinue Gemcitabine Injection in patients who develop severe hepatic toxicity. 5.7 Embryo-Fetal Toxicity Based on animal data and its mechanism of action, Gemcitabine Injection can cause fetal harm when administered to a pregnant woman. Gemcitabine was teratogenic, embryotoxic, and fetotoxic in mice and rabbits. Advise pregnant women of the potential risk to a fetus. Advise females of reproductive potential to use effective contraception during treatment with Gemcitabine Injection and for 6 months after the final dose. Advise male patients with female partners of reproductive potential to use effective contraception during treatment with Gemcitabine Injection and for 3 months following the final dose [see Use in Specific Populations ( 8.1 , 8.3 )] . 5.8 Exacerbation of Radiation Therapy Toxicity Gemcitabine is not recommended for use in combination with radiation therapy. Concurrent (given together or ≤7 days apart) Life-threatening mucositis, especially esophagitis and pneumonitis occurred in a trial in which gemcitabine was administered at a dose of 1000 mg/m 2 to patients with non-small cell lung cancer for up to 6 consecutive weeks concurrently with thoracic radiation. Non-concurrent (given >7 days apart) Excessive toxicity has not been observed when gemcitabine is administered more than 7 days before or after radiation. Radiation recall has been reported in patients who received gemcitabine after prior radiation. 5.9 Capillary Leak Syndrome Capillary leak syndrome (CLS) with severe consequences has been reported in patients receiving gemcitabine as a single agent or in combination with other chemotherapeutic agents [see Adverse Reactions ( 6.2 )] . Permanently discontinue Gemcitabine Injection if CLS develops during therapy. 5.10 Posterior Reversible Encephalopathy Syndrome Posterior reversible encephalopathy syndrome (PRES) has been reported in patients receiving gemcitabine as a single agent or in combination with other chemotherapeutic agents [see Adverse Reactions ( 6.2 )] . PRES can present with headache, seizure, lethargy, hypertension, confusion, blindness, and other visual and neurologic disturbances. Confirm the diagnosis of PRES with magnetic resonance imaging (MRI). Permanently discontinue Gemcitabine Injection if PRES develops during therapy.