IFEX by is a Prescription medication manufactured, distributed, or labeled by Bamboo US Bidco LCC, Baxter Deutschland GmbH. Drug facts, warnings, and ingredients follow.
IFEX (ifosfamide) is an alkylating drug indicated for use in combination with certain other approved antineoplastic agents for third-line chemotherapy of germ cell testicular cancer. It should be used in combination with mesna for prophylaxis of hemorrhagic cystitis. (1)
Dosage and duration of treatment and/or treatment intervals depend on the scheme of combination therapy, the patient’s general state of health and organ function, and the results of laboratory monitoring. ( 2)
Single dose vials: 1 gram, 3 grams ( 3)
In clinical trials of ifosfamide monotherapy, the most common (≥ 10%) adverse reactions were alopecia, nausea/vomiting, leukopenia, anemia, CNS toxicity, hematuria, and infection. ( 6.1)
To report SUSPECTED ADVERSE REACTIONS, contact Baxter Healthcare at phone: 1 866 888 2472 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.
See 17 for PATIENT COUNSELING INFORMATION.
Revised: 7/2018
Myelosuppression can be severe and lead to fatal infections. Monitor blood counts prior to and at intervals after each treatment cycle. CNS toxicities can be severe and result in encephalopathy and death. Monitor for CNS toxicity and discontinue treatment for encephalopathy. Nephrotoxicity can be severe and result in renal failure. Hemorrhagic cystitis can be severe and can be reduced by the prophylactic use of mesna. [see Warnings and Precautions (5.1-5.3)]
IFEX should be administered intravenously at a dose of 1.2 grams per m 2per day for 5 consecutive days. Treatment is repeated every 3 weeks or after recovery from hematologic toxicity.
In order to prevent bladder toxicity, IFEX should be given with extensive hydration consisting of at least 2 liters of oral or intravenous fluid per day. Mesna should be used to reduce the incidence of hemorrhagic cystitis. IFEX should be administered as a slow intravenous infusion lasting a minimum of 30 minutes. Studies of IFEX in patients with hepatic or renal impairment have not been conducted [see Use in Specific Populations ( 8.6, 8.7)] .
Injections are prepared for parenteral use by adding Sterile Water for Injection, USPor Bacteriostatic Water for Injection, USP(benzyl alcohol or parabens preserved), to the vial and shaking to dissolve. Before parenteral administration, the substance must be completely dissolved. Use the quantity of diluents shown below to constitute the product:
Dosage Strength |
Quantity of Diluent |
Final Concentration |
1 gram |
20 mL |
50 mg per mL |
3 grams |
60 mL |
50 mg per mL |
Solutions of ifosfamide may be diluted further to achieve concentrations of 0.6 to 20 mg/mL in the following fluids:
5% Dextrose Injection, USP
0.9% Sodium Chloride Injection, USP
Lactated Ringer’s Injections, USP
Sterile Water for Injection, USP
Because essentially identical stability results were obtained for Sterile Water admixtures as for the other admixtures (5% Dextrose Injection, 0.9% Sodium Chloride Injection, and Lactated Ringer’s Injection), the use of large volume parenteral glass bottles, VIAFLEX bags or PAB bags that contain intermediate concentrations or mixtures of excipients (e.g., 2.5% Dextrose Injection, 0.45% Sodium Chloride Injection, or 5% Dextrose and 0.9% Sodium Chloride Injection) is also acceptable.
Constituted or constituted and further diluted solutions of IFEX should be refrigerated and used within 24 hours. Benzyl-alcohol-containing solutions can reduce the stability of ifosfamide.
Parenteral drug products should be inspected visually for particulate matter and discoloration prior to administration, whenever solution and container permit.
Treatment with ifosfamide may cause myelosuppression and significant suppression of immune responses, which can lead to severe infections. Fatal outcomes of ifosfamide-associated myelosuppression have been reported. Ifosfamide-induced myelosuppression can cause leukopenia, neutropenia, thrombocytopenia (associated with a higher risk of bleeding events), and anemia. The nadir of the leukocyte count tends to be reached approximately during the second week after administration. When IFEX is given in combination with other chemotherapeutic/hematotoxic agents and/or radiation therapy, severe myelosuppression is frequently observed. The risk of myelosuppression is dose-dependent and is increased with administration of a single high dose compared with fractionated administration. The risk of myelosuppression is also increased in patients with reduced renal function.
Severe immunosuppression has led to serious, sometimes fatal, infections. Sepsis and septic shock also have been reported. Infections reported with ifosfamide include pneumonias, as well as other bacterial, fungal, viral, and parasitic infections. Latent infections can be reactivated. In patients treated with ifosfamide, reactivation has been reported for various viral infections. Infections must be treated appropriately. Antimicrobial prophylaxis may be indicated in certain cases of neutropenia at the discretion of the managing physician. In case of neutropenic fever, antibiotics and/or antimycotics must be given. Close hematologic monitoring is recommended. White blood cell (WBC) count, platelet count and hemoglobin should be obtained prior to each administration and at appropriate intervals after administration. Unless clinically essential, IFEX should not be given to patients with a WBC count below 2000/µL and/or a platelet count below 50,000/µL.
IFEX should be given cautiously, if at all, to patients with presence of an infection, severe immunosuppression or compromised bone marrow reserve, as indicated by leukopenia, granulocytopenia, extensive bone marrow metastases, prior radiation therapy, or prior therapy with other cytotoxic agents.
Administration of ifosfamide can cause CNS toxicity and other neurotoxic effects. The risk of CNS toxicity and other neurotoxic effects necessitates careful monitoring of the patient. Neurologic manifestations consisting of somnolence, confusion, hallucinations, blurred vision, psychotic behavior, extrapyramidal symptoms, urinary incontinence, seizures, and in some instances, coma, have been reported following IFEX therapy. There have also been reports of peripheral neuropathy associated with ifosfamide use.
Ifosfamide neurotoxicity may manifest within a few hours to a few days after first administration and in most cases resolves within 48 to 72 hours of ifosfamide discontinuation. Symptoms may persist for longer periods of time. Supportive therapy should be maintained until their complete resolution. Occasionally, recovery has been incomplete. Fatal outcomes of CNS toxicity have been reported. Recurrence of CNS toxicity after several uneventful treatment courses has been reported. If encephalopathy develops, administration of ifosfamide should be discontinued.
Due to the potential for additive effects, drugs acting on the CNS (such as antiemetics, sedatives, narcotics, or antihistamines) must be used with particular caution or, if necessary, be discontinued in case of ifosfamide-induced encephalopathy.
Manifestations of CNS toxicity may impair a patient’s ability to operate an automobile or other heavy machinery.
Ifosfamide is both nephrotoxic and urotoxic. Glomerular and tubular kidney function must be evaluated before commencement of therapy as well as during and after treatment. Monitor urinary sediment regularly for the presence of erythrocytes and other signs of uro/nephrotoxicity.
Monitor serum and urine chemistries, including phosphorus and potassium regularly. Administer appropriate replacement therapy as indicated. Renal parenchymal and tubular necrosis have been reported in patients treated with ifosfamide. Acute tubular necrosis, acute renal failure, and chronic renal failure secondary to ifosfamide therapy have been reported, and fatal outcome from nephrotoxicity has been documented.
Disorders of renal function, (glomerular and tubular) following ifosfamide administration are very common. Manifestations include a decrease in glomerular filtration rate, increased serum creatinine, proteinuria, enzymuria, cylindruria, aminoaciduria, phosphaturia, and glycosuria as well as tubular acidosis. Fanconi syndrome, renal rickets, and growth retardation in children as well as osteomalacia in adults also have been reported. Development of a syndrome resembling SIADH (syndrome of inappropriate antidiuretic hormone secretion) has been reported with ifosfamide.
Tubular damage may become apparent during therapy, months or even years after cessation of treatment. Glomerular or tubular dysfunction may resolve with time, remain stable, or progress over a period of months or years, even after completion of ifosfamide treatment.
The risk and expected benefits of ifosfamide therapy should be carefully weighed when considering the use of ifosfamide in patients with preexisting renal impairment or reduced nephron reserve.
Urotoxic side effects, especially hemorrhagic cystitis, have been very commonly associated with the use of IFEX (ifosfamide). These urotoxic effects can be reduced by prophylactic use of mesna.
Hemorrhagic cystitis requiring blood transfusion has been reported with ifosfamide. The risk of hemorrhagic cystitis is dose-dependent and increased with administration of single high doses compared to fractionated administration. Hemorrhagic cystitis after a single dose of ifosfamide has been reported. Past or concomitant radiation of the bladder or busulfan treatment may increase the risk for hemorrhagic cystitis.
Before starting treatment, it is necessary to exclude or correct any urinary tract obstructions [see Contraindications (4)].
During or immediately after administration, adequate amounts of fluid should be ingested or infused to force dieresis in order to reduce the risk of urinary tract toxicity. Obtain a urinalysis prior to each dose of IFEX (ifosfamide). If microscopic hematuria (greater than 10 RBCs per high power field) is present, then subsequent administration should be withheld until complete resolution. Further administration of IFEX should be given with vigorous oral or parenteral hydration.
Ifosfamide should be used with caution, if at all, in patients with active urinary tract infections.
Manifestations of cardiotoxicity reported with ifosfamide treatment include:
Fatal outcome of ifosfamide-associated cardiotoxicity has been reported.
The risk of developing cardiotoxic effects is dose-dependent. It is increased in patients with prior or concomitant treatment with other cardiotoxic agents or radiation of the cardiac region and, possibly, renal impairment.
Particular caution should be exercised when ifosfamide is used in patients with risk factors for cardiotoxicity and in patients with preexisting cardiac disease.
Interstitial pneumonitis, pulmonary fibrosis, and other forms of pulmonary toxicity have been reported with ifosfamide treatment. Pulmonary toxicity leading to respiratory failure as well as fatal outcome has also been reported. Monitor for signs and symptoms of pulmonary toxicity and treat as clinically indicated.
Treatment with ifosfamide involves the risk of secondary tumors and their precursors as late sequelae. The risk of myelodysplastic alterations, some progressing to acute leukemias, is increased. Other malignancies reported after use of ifosfamide or regimens with ifosfamide include lymphoma, thyroid cancer, and sarcomas.
The secondary malignancy may develop several years after chemotherapy has been discontinued.
Veno-occlusive liver disease has been reported with chemotherapy that included ifosfamide.
IFEX can cause fetal harm when administered to a pregnant woman. Fetal growth retardation and neonatal anemia have been reported following exposure to ifosfamide-containing chemotherapy regimens during pregnancy. Ifosfamide is genotoxic and mutagenic in male and female germ cells. Embryotoxic and teratogenic effects have been observed in mice, rats and rabbits at doses 0.05 to 0.075 times the human dose.
Women should not become pregnant and men should not father a child during therapy with ifosfamide. Further, men should not father a child for up to 6 months after the end of therapy. If this drug is used during pregnancy, or if the patient becomes pregnant while taking this drug or after treatment, the patient should be apprised of the potential hazard to a fetus [see Use in Specific Populations (8.1)].
Ifosfamide interferes with oogenesis and spermatogenesis. Amenorrhea, azoospermia, and sterility in both sexes have been reported. Development of sterility appears to depend on the dose of ifosfamide, duration of therapy, and state of gonadal function at the time of treatment. Sterility may be irreversible in some patients.
Female Patients
Amenorrhea has been reported in patients treated with ifosfamide. The risk of permanent chemotherapy-induced amenorrhea increases with age. Pediatric patients treated with ifosfamide during prepubescence subsequently may not conceive and those who retain ovarian function after completing treatment are at increased risk of developing premature menopause.
Male Patients
Men treated with ifosfamide may develop oligospermia or azoospermia. Pediatric patients treated with ifosfamide during prepubescence might not develop secondary sexual characteristics normally, but may have oligospermia or azoospermia. Azoospermia may be reversible in some patients, though the reversibility may not occur for several years after cessation of therapy. Sexual function and libido are generally unimpaired in these patients. Some degree of testicular atrophy may occur. Patients treated with ifosfamide have subsequently fathered children.
Anaphylactic/anaphylactoid reactions have been reported in association with ifosfamide.
Cross-sensitivity between oxazaphosphorine cytotoxic agents has been reported.
Ifosfamide is excreted in breast milk. Women must not breastfeed during treatment with ifosfamide [see Use in Specific Populations (8.3)].
Because clinical trials are conducted from widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in clinical practice. The adverse reactions and frequencies below are based on 30 publications describing clinical experience with fractionated administration of ifosfamide as monotherapy with a total dose of 4 to 12 g/m 2per course.
|
||
System Organ Class (SOC) |
Adverse Reaction |
Percentage (Ratio) |
INFECTIONS AND INFESTATIONS |
Infection |
9.9% (112/1128) |
BLOOD AND LYMPHATIC SYSTEM DISORDERS |
Leukopenia *(any) |
-- |
Leukopenia <1 x 10 3/µL |
43.5% (267/614) |
|
Thrombocytopenia †(any) |
-- |
|
Thrombocytopenia, 50 x 10 3/µL |
4.8% (35/729) |
|
Anemia ‡ |
37.9% (202/533) |
|
METABOLISM AND NUTRITION DISORDERS |
Anorexia |
1.1% (15/1317) |
NERVOUS SYSTEM DISORDERS |
15.4% (154/1001) |
|
Peripheral neuropathy |
0.4% (5/1317) |
|
CARDIAC DISORDERS |
Cardiotoxicity # |
0.5% (7/1317) |
VASCULAR DISORDERS |
Hypotention Þ |
0.3% (4/1317) |
GASTROINTESTINAL DISORDERS |
Nausea/Vomiting |
46.8% (443/964) |
Diarrhea |
0.7% (9/1317) |
|
Stomatitis |
0.3% (4/1317) |
|
HEPATOBILIARY DISORDERS |
Hepatotoxicity ß |
1.8% (22/1190) |
SKIN AND SUBCUTANEOUS TISSUES DISORDERS |
Alopecia |
89.6% (540/603) |
Dermatitis |
0.08% (1/1317) |
|
Papular rash |
0.08% (1/1317) |
|
RENAL AND URINARY DISORDERS |
Hemorrhagic cystitis à |
-- |
Hematuria |
||
- without mesna |
44.1% (282/640) |
|
- with mesna |
21.3% (33/155) |
|
Macrohematuria |
||
- without mesna |
11.1% (66/594) |
|
- with mesna |
5.2% (5/97) |
|
Renal dysfunction è |
-- |
|
Renal structural damage |
-- |
|
GENERAL DISORDERS AND ADMINISTRATIVE SITE CONDITIONS |
Phlebitis ð |
2.8% (37/1317) |
Neutropenic fever ø |
1.0% (13/1317) |
|
Fatigue |
0.3% (4/1317) |
|
Malaise |
Unable to calculate |
The following adverse reactions have been identified during post-approval use of IFEX. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure.
INFECTIONS AND INFESTATIONS:
The following manifestations have been associated with myelosuppression and immunosuppression caused by ifosfamide: increased risk for and severity of infections†, pneumonias†, sepsis and septic shock (including fatal outcomes), as well as reactivation of latent infections, including viral hepatitis†, Pneumocystis jiroveci†, herpes zoster, Strongyloides, progressive multifocal leukoencephalopathy†, and other viral and fungal infections.
† Severe immunosuppression has led to serious, sometimes fatal, infections.
NEOPLASMS, BENIGN AND MALIGNANT AND UNSPECIFIED (INCL CYSTS AND POLYPS):
As treatment-related secondary malignancy*, Acute leukemia* (Acute myeloid leukemia)*, Acute promyelocytic leukemia*, Acute lymphocytic leukemia*, Myelodysplastic syndrome, Lymphoma (Non-Hodgkin’s lymphoma), Sarcomas*, Renal cell carcinoma, Thyroid cancer
BLOOD AND LYMPHATIC SYSTEM DISORDERS:
Hematotoxicity*, Myelosuppression manifested as Bone marrow failure, Agranulocytosis; Febrile bone marrow aplasia; Disseminated intravascular coagulation, Hemolytic uremic syndrome, Hemolytic anemia, Neonatal anemia, Methemoglobinemia
IMMUNE SYSTEM DISORDERS:
Angioedema*, Anaphylactic reaction, Immunosuppression, Urticaria, Hypersensitivity reaction
ENDOCRINE DISORDERS:
Syndrome of inappropriate antidiuretic hormone secretion (SIADH)
METABOLISM AND NUTRITION DISORDERS:
Tumor lysis syndrome, Metabolic acidosis, Hypokalemia, Hypocalcemia, Hypophosphatemia, Hyperglycemia, Polydipsia
PSYCHIATRIC DISORDERS:
Panic attack, Catatonia, Mania, Paranoia, Delusion, Delirium, Bradyphrenia, Mutism, Mental status change, Echolalia, Logorrhea, Perseveration, Amnesia
NERVOUS SYSTEM DISORDERS:
Convulsion*, Status epilepticus (convulsive and nonconvulsive), reversible posterior leukoencephalopathy syndrome, Leukoencephalopathy, Extrapyramidal disorder, Asterixis, Movement disorder, Polyneuropathy, Dysesthesia, Hypothesia, Paresthesia, Neuralgia, Gait disturbance, Fecal incontinence, Dysarthria
Ifosfamide has been reintroduced after neurotoxicity. While some patients did not experience neurotoxicity, others had recurrent, including fatal, events.
EYE DISORDERS:
Visual impairment, Vision blurred, Conjunctivitis, Eye irritation
EAR AND LABYRINTH DISORDERS:
Deafness, Hypoacusis, Vertigo, Tinnitus
CARDIAC DISORDERS:
Cardiotoxicity*, Cardiac arrest*, Ventricular fibrillation*, Ventricular tachycardia*, Cardiogenic shock*, Myocardial infarction*, Cardiac failure*, Bundle branch block left, Bundle branch block right, Pericardial effusion, Myocardial hemorrhage, Angina pectoris, Left ventricular failure, Cardiomyopathy*, Congestive cardiomyopathy, Myocarditis*, Arrhythmia*, Pericarditis, Atrial fibrillation, Atrial flutter, Bradycardia, Supraventricular extrasystoles, Premature atrial contractions, Ventricular extrasystoles, Myocardial depression, Palpitations, Ejection fraction decreased*, Electrocardiogram ST-segment abnormal, Electrocardiogram T-wave inversion, Electrocardiogram QRS complex abnormal
VASCULAR DISORDERS:
Pulmonary embolism, Deep vein thrombosis, Capillary leak syndrome, Vasculitis, Hypertension, Flushing, Blood pressure decreased
RESPIRATORY, THORACIC, AND MEDIASTINAL DISORDERS:
Respiratory failure*, Acute respiratory distress syndrome*, Pulmonary hypertension*, Interstitial lung disease* as manifested by Pulmonary fibrosis*, Alveolitis allergic, Interstitial pneumonitis, Pneumonitis*, Pulmonary edema*, Pleural effusion, Bronchospasm, Dyspnea, Hypoxia, Cough
GASTROINTESTINAL DISORDERS:
Cecitis, Colitis, Enterocolitis, Pancreatitis, Ileus, Gastrointestinal hemorrhage, Mucosal ulceration, Constipation, Abdominal pain, Salivary hypersecretion
HEPATOBILIARY DISORDERS:
Hepatic failure*, Hepatitis fulminant*, Veno-occlusive liver disease, Portal vein thrombosis, Cytolytic hepatitis, Cholestasis
SKIN AND SUBCUTANEOUS TISSUE DISORDERS:
Toxic epidermal necrolysis, Stevens-Johnson syndrome, Palmar-plantar erythrodysesthesia syndrome, Radiation recall dermatitis, Skin necrosis, Facial swelling, Petechiae, Macular rash, Rash, Pruritus, Erythema, Skin hyperpigmentation, Hyperhidrosis, nail disorder
MUSCULOSKELETAL AND CONNECTIVE TISSUE DISORDER:
Rhabdomyolysis, Osteomalacia, Rickets, Growth retardation, Myalgia, Arthralgia, Pain in extremity, Muscle twitching
RENAL AND URINARY DISORDERS:
Fanconi syndrome, Tubulointerstitial nephritis, Nephrogenic diabetes insipidus, Phosphaturia, Aminoaciduria, Polyuria, Enuresis, Feeling of residual urine
Fatal outcomes from acute and chronic renal failure have been documented.
REPRODUCTIVE SYSTEM AND BREAST DISORDERS:
Infertility, Ovarian failure, Premature menopause, Amenorrhea, Ovarian disorder, Ovulation disorder, Azoospermia, Oligospermia, Impairment of spermatogenesis, Blood estrogen decreased, Blood gonadotrophin increased
CONGENITAL, FAMILIAL AND GENETIC DISORDERS:
Fetal growth retardation
GENERAL DISORDERS AND ADMINISTRATIVE SITE CONDITIONS:
Multi-organ failure*, General physical deterioration, Injection/Infusion site reactions including swelling, inflammation, pain, erythema, tenderness, pruritus; Chest pain, Edema, Mucosal inflammation, Pain, Pyrexia, Chills
* Including fatal outcomes
Ifosfamide is a substrate for both CYP3A4 and CYP2B6.
CYP3A4 inducers (e.g., carbamazepine, phenytoin, fosphenytoin, phenobarbital, rifampin, St. John Wort) may increase the metabolism of ifosfamide to its active alkylating metabolites. CYP3A4 inducers may increase the formation of the neurotoxic/nephrotoxic ifosfamide metabolite, chloroacetaldehyde. Closely monitor patients taking ifosfamide with CYP3A4 inducers for toxicities and consider dose adjustment.
CYP3A4 inhibitors (e.g., ketoconazole, fluconazole, itraconazole, sorafenib, aprepitant, fosaprepitant, grapefruit, grapefruit juice) may decrease the metabolism of ifosfamide to its active alkylating metabolites, perhaps decreasing the effectiveness of ifosfamide treatment.
IFEX can cause fetal harm when administered to a pregnant woman. Fetal growth retardation and neonatal anemia have been reported following exposure to ifosfamide‑containing chemotherapy regimens during pregnancy.
Animal studies indicate that ifosfamide is capable of causing gene mutations and chromosomal damage in vivo. In pregnant mice, resorptions increased and anomalies were present at day 19 after a 30 mg/m 2dose of ifosfamide was administered on day 11 of gestation. Embryo-lethal effects were observed in rats following the administration of 54 mg/m 2doses of ifosfamide from the 6th through the 15th day of gestation and embryotoxic effects were apparent after dams received 18 mg/m 2doses over the same dosing period. Ifosfamide is embryotoxic to rabbits receiving 88 mg/m 2/day doses from the 6th through the 18th day after mating. The number of anomalies was also significantly increased over the control group.
Women should not become pregnant and men should not father a child during therapy with ifosfamide. Further, men should not father a child for up to 6 months after the end of therapy. If this drug is used during pregnancy, or if the patient becomes pregnant while taking this drug or after treatment, the patient should be apprised of the potential hazard to a fetus.
Ifosfamide is excreted in breast milk. Because of the potential for serious adverse events and the tumorigenicity shown for ifosfamide in animal studies, a decision should be made whether to discontinue nursing or to discontinue the drug, taking into account the importance of the drug to the mother. Women must not breastfeed during treatment with ifosfamide.
In general, dose selection for an elderly patient should be cautious, reflecting the greater frequency of decreased hepatic, renal, or cardiac function, and of concomitant disease or other drug therapy.
A study of patients 40 to 71 years of age indicated that elimination half-life appears to increase with advancing age [see Pharmacokinetics (12.3)]. This apparent increase in half-life appeared to be related to increases in volume of distribution of ifosfamide with age. No significant changes in total plasma clearance or renal or non-renal clearance with age were reported.
Ifosfamide and its metabolites are known to be substantially excreted by the kidney, and the risk of toxic reactions to this drug may be greater in patients with impaired renal function. Because elderly patients are more likely to have decreased renal function, care should be taken in dose selection, and it may be useful to monitor renal function.
No formal studies were conducted in patients with renal impairment. Ifosfamide and its metabolites are known to be excreted by the kidneys and may accumulate in plasma with decreased renal function. Patients with renal impairment should be closely monitored for toxicity and dose reduction may be considered. Ifosfamide and its metabolites are dialyzable .
No specific antidote for IFEX is known.
Patients who receive an overdose should be closely monitored for the development of toxicities. Serious consequences of overdosage include manifestations of dose-dependent toxicities such as CNS toxicity, nephrotoxicity, myelosuppression, and mucositis [see Warnings and Precautions (5)].
Management of overdosage would include general supportive measures to sustain the patient through any period of toxicity that might occur, including appropriate state-of-the-art treatment for any concurrent infection, myelosuppression, or other toxicity. Ifosfamide as well as ifosfamide metabolites are dialyzable.
Cystitis prophylaxis with mesna may be helpful in preventing or limiting urotoxic effects with overdose.
IFEX (ifosfamide for injection, USP) single-dose vials for constitution and administration by intravenous infusion each contain 1 gram or 3 grams of sterile ifosfamide. Ifosfamide is a chemotherapeutic agent chemically related to the nitrogen mustards and a synthetic analog of cyclophosphamide. Ifosfamide is 3-(2-chloroethyl)-2-[(2-chloroethyl)amino]tetrahydro-2H-1,3,2-oxazaphosphorine 2-oxide. The molecular formula is C 7H 15Cl 2N 2O 2P and its molecular weight is 261.1. Ifosfamide is a white crystalline powder soluble in water. There are no excipients in the formulation. Each vial contains 1 gram or 3 grams of sterile ifosfamide alone.
Its structural formula is:
Ifosfamide is a prodrug that requires metabolic activation by hepatic cytochrome P450 isoenzymes to exert its cytotoxic activity. Activation occurs by hydroxylation at the ring carbon atom forming the unstable intermediate 4-hydroxyifosfamide and its ring-opened aldo tautomer, which decomposes to yield the cytotoxic and urotoxic compound acrolein and an alkylating isophosphoramide mustard as well as multiple other nontoxic products. The exact mechanism of action of ifosfamide has not been determined, but its cytotoxic action is primarily through DNA crosslinks caused by alkylation by the isophosphoramide mustard at guanine N-7 positions. The formation of inter- and intra-strand cross-links in the DNA results in cell death.
Ifosfamide exhibits dose-dependent pharmacokinetics in humans. At single doses of 3.8 to 5.0 g/m 2, the plasma concentrations decay biphasically and the mean terminal elimination half-life is about 15 hours. At doses of 1.6 to 2.4 g/m 2/day, the plasma decay is monoexponential and the terminal elimination half-life is about 7 hours.
Ifosfamide exhibits time-dependent pharmacokinetics in humans. Following intravenous administration of 1.5 g/m 2over 0.5 hour once daily for 5 days to 15 patients with neoplastic disease, a decrease in the median elimination half-life from 7.2 hour on Day 1 to 4.6 hours on Day 5 occurred with a concomitant increase in the median clearance from 66 mL/min on Day 1 to 115 mL/min on Day 5. There was no significant change in the volume of distribution on Day 5 compared with Day 1.
Ifosfamide volume of distribution (Vd) approximates the total body water volume, suggesting that distribution takes place with minimal tissue binding. Following intravenous administration of 1.5 g/m 2over 0.5 hour once daily for 5 days to 15 patients with neoplastic disease, the median Vd of ifosfamide was 0.64 L/kg on Day 1 and 0.72 L/kg on Day 5. Ifosfamide shows little plasma protein binding. Ifosfamide and its active metabolites are extensively bound by red blood cells. Ifosfamide is not a substrate for P-glycoprotein.
Ifosfamide is extensively metabolized in humans through two metabolic pathways: ring oxidation ("activation") to form the active metabolite, 4-hydroxy-ifosfamide and side-chain oxidation to form the inactive metabolites, 3-dechloro-ethylifosfamide or 2-dechloroethylifosfamide with liberation of the toxic metabolite, chloroacetaldehyde. Small quantities (nmol/mL) of ifosfamide mustard and 4-hydroxyifosfamide are detectable in human plasma. Metabolism of ifosfamide is required for the generation of the biologically active species and while metabolism is extensive, it is also quite variable among patients.
After administration of doses of 5 g/m 2of 14C-labeled ifosfamide, from 70% to 86% of the dosed radioactivity was recovered in urine as metabolites, with about 61% of the dose excreted as parent compound. At doses of 1.6 to 2.4 g/m 2only 12% to 18% of the dose was excreted in the urine as unchanged drug within 72 hours. Two different dechloroethylated derivatives of ifosfamide, 4-carboxyifosfamide, thiodiacetic acid and cysteine conjugates of chloroacetic acid have been identified as the major urinary metabolites of ifosfamide in humans and only small amounts of 4-hydroxyifosfamide and acrolein are present.
Population PK analysis was performed on plasma data from 32 pediatric patients various malignant diseases aged between 1 and 18 years. Patients received a total of 45 courses of ifosfamide at doses of 1.2, 2.0 and 3.0 g/m 2given intravenously over 1 or 3 hours on 1, 2, or 3 days. The mean±standard error population estimates for the initial clearance and volume of distribution of ifosfamide were 2.4±0.33 L/h/m 2and 21±1.6 L/m 2with an interindividual variability of 43% and 32%, respectively.
A study of 20 patients between 40 to 71 years of age receiving 1.5 g/m 2of ifosfamide daily for 3 or 5 days indicated that elimination half-life appears to increase with age. The elimination half-life increase appeared to be related to the increase in ifosfamide volume of distribution with age. No significant changes in total plasma clearance or renal clearance with age were reported.
Ifosfamide has been shown to be carcinogenic in rats when administered by intraperitoneal injection at 6 mg/kg (37 mg/m 2, or about 3% of the daily human dose on a mg/m 2basis) 3 times a week for 52 weeks. Female rats had a significantly higher incidence of uterine leiomyosarcomas and mammary fibroadenomas than vehicle controls.
The mutagenic potential of ifosfamide has been documented in bacterial systems in vitroand mammalian cells in vivo. In vivo, ifosfamide has induced mutagenic effects in mice and Drosophila melanogastergerm cells, and has induced a significant increase in dominant lethal mutations in male mice as well as recessive sex-linked lethal mutations in Drosophila.
Ifosfamide was administered to male and female beagle dogs at doses of 1.00 or 4.64 mg/kg/day (20 or 93 mg/m 2) orally 6 days a week for 26 weeks. Male dogs at 4.64 mg/kg (about 7.7% of the daily clinical dose on a mg/m 2basis) had testicular atrophy with degeneration of the seminiferous tubular epithelium. In a second study, male and female rats were given 0, 25, 50, or 100 mg/kg (0, 150, 300, or 600 mg/m 2) ifosfamide intraperitoneally once every 3 weeks for 6 months. Decreased spermatogenesis was observed in most male rats given 100 mg/kg (about half the daily clinical dose on a mg/m 2basis).
Patients with refractory testicular cancer (n=59) received a combination of ifosfamide, cisplatin, and either etoposide (VePesid) or vinblastine (VIP) as third-line therapy or later. The selection of etoposide or vinblastine (“V” in the VIP regimen) was guided by the therapeutic effect achieved with prior regimens. The contribution of ifosfamide to the VIP combination was determined in patients treated with cisplatin-etoposide prior to ifosfamide- cisplatin-etoposide or those who received cisplatin-vinblastine prior to ifosfamide-cisplatin-vinblastine.
A total of 59 patients received a third-line salvage regimen which consisted of ifosfamide 1.2 g/m 2/day intravenously on days 1 to 5, cisplatin 20 mg/m 2/day intravenously on days 1 to 5, and either etoposide 75 mg/m 2/day intravenously on days 1 to 5 or vinblastine 0.22 mg/kg intravenously on day 1. Efficacy results with the VIP regimen were compared to data pooled from six single agent phase II trials conducted between August 1980 and October 1985 including a total of 90 patients of whom 65 were eligible as controls of this study. Twenty-three patients in the VIP regimen became free of disease with VIP alone or VIP plus surgery, whereas a single patient in the historical control group achieved complete response. The median survival time exceeded two years in the VIP group versus less than one year in the control group. Performance status ≥ 80, embryonal carcinoma and minimal disease were favorable prognostic factors for survival. In all prognostic categories, the difference between VIP and historical controls remained highly significant.
|
|||
Number. (%) of Patients | |||
VIP |
Control |
p-value |
|
Total Patients |
59 (100) |
65 (100) | |
Disease-free |
23 (39) |
1 (2) |
< 0.001 |
Chemotherapy alone |
15 (25) |
1 (2) |
< 0.001 |
Chemotherapy plus surgery |
8 (14) |
0 | |
Overall Response |
32 (54) |
2 (3) |
< 0.001 |
Time to progression (weeks) | |||
Median |
19 |
4 |
< 0.001 * |
Range |
1 – 205+ |
1 – 29 | |
Disease-free interval (weeks) | |||
Median |
114 |
29 | |
Range |
13 – 205+ |
-- | |
Survival (weeks) | |||
Median |
53 |
10 |
< 0.001 * |
Range |
1 – 205+ |
1 – 123+ |
In a study, 50 fully evaluable patients with germ cell testicular cancer were treated with IFEX in combination with cisplatin and either vinblastine or etoposide after failing (47 of 50 patients) at least two prior chemotherapy regimens consisting of cisplatin/vinblastine/bleomycin, (PVB), cisplatin/vinblastine/actinomycin D/bleomycin/cyclophosphamide, (VAB6), or the combination of cisplatin and etoposide. Patients were selected for remaining cisplatin sensitivity because they had previously responded to a cisplatin containing regimen and had not progressed while on the cisplatin containing regimen or within 3 weeks of stopping it. Patients served as their own control based on the premise that long term complete responses could not be achieved by retreatment with a regimen to which they had previously responded and subsequently relapsed.
Ten of 50 fully evaluable patients were still alive 2 to 5 years after treatment. Four of the 10 long term survivors were rendered free of cancer by surgical resection after treatment with the ifosfamide regimen; median survival for the entire group of 50 fully evaluable patients was 53 weeks.
IFEX (ifosfamide for injection, USP) is available in single-dose vials as follows:
Store at controlled room temperature 20°C to 25°C (68°F to 77°F).
Protect from temperatures above 30°C (86°F).
Exercise caution when handling IFEX. The handling and preparation of ifosfamide should always be in accordance with current guidelines on safe handling of cytotoxic agents. Several guidelines on this subject have been published. 1-4Skin reactions associated with accidental exposure to IFEX may occur. To minimize the risk of dermal exposure, always wear impervious gloves when handling vials and solutions containing IFEX. If IFEX solution contacts the skin or mucosa, immediately wash the skin thoroughly with soap and water or rinse the mucosa with copious amounts of water.
Myelosuppression, Immunosuppression, and Infections
Central Nervous System Toxicity, Neurotoxicity
Renal and Urothelial Toxicity and Effects
Cardiotoxicity
Pulmonary Toxicity
Secondary Malignancies
Veno-occlusive Liver Disease
Pregnancy
Lactation
Reproductive System Disorders
Skin and Subcutaneous Tissue Disorders
Gastrointestinal Disorders
Eye Disorders
Ear and Labyrinth Disorders
NDC: 0338-3991-01
IFEX
IFOSFAMIDE FOR INJECTION, USP
1 g/vial
Rx only
SINGLE-DOSE VIAL
This vial contains 1g ifosfamide.
Add 20 mL Sterile Water for
Injection, USP, or Sterile
Bacteriostatic Water for Injection,
USP, (benzyl alcohol or parabens
preserved), shaking to dissolve,
for a reconstituted concentration
of 50 mg per mL.
Store at controlled room
temperature 20° C to 25° C
(68° F to 77° F)
Protect from temperatures
above 30° C (86° F).
FOR IV USE
READ ACCOMPANYING
PACKAGE INSERT for detailed
indications, dosage, and
precautions.
Manufactured by:
Baxter Healthcare Corporation
Deerfield, IL 60015 USA
USA HA-65-01-561
C130
Bar Code
N(01)1 03 0338 3991 01 7
Lot:/Exp.:
JMXXX
JJJJ - MM
1 vial
NDC: 0338-3991-01
IFEX
(ifosfamide for injection, USP)
Single-Dose Vial
FOR IV USE
Rx only
1 g
Baxter Logo
Manufactured by
Baxter Healthcare Corporation
Deerfield, IL 60015 USA
See bottom panel for lot
number and expiration date.
Bar Code
N3 0338399101 0
This vial contains 1 g ifosfamide. Add
20 mL Sterile Water for Injection, USP,
or Sterile Bacteriostatic Water for
Injection, USP, (benzyl alcohol or
parabens preserved), shaking to
dissolve, for a reconstituted
concentration of 50 mg per mL.
READ ACCOMPANYING PACKAGE
INSERT for detailed indications,
dosage, and precautions.
Store at controlled room
temperature 20° C to 25° C
(68° F to 77° F). Protect from
temperatures above 30° C (86° F).
Constituted solutions should be
refrigerated and used within 24 hours.
Manufactured by:
Baxter Healthcare Corporation
Deerfield, IL 60015 USA
Made in Germany
NDC: 0338-3993-01
IFEX
IFOSFAMIDE FOR INJECTION, USP
3 g/vial
Rx only
SINGLE-DOSE VIAL
This vial contains 3g ifosfamide.
Add 60 mL Sterile Water for
Injection, USP, or Sterile
Bacteriostatic Water for Injection,
USP, (benzyl alcohol or parabens
preserved), shaking to dissolve,
for a reconstituted concentration
of 50 mg per mL.
Store at controlled room
temperature 20° C to 25° C
(68° F to 77° F)
Protect from temperatures
above 30° C (86° F).
FOR IV USE
READ ACCOMPANYING
PACKAGE INSERT for detailed
indications, dosage, and
precautions.
Manufactured by:
Baxter Healthcare Corporation
Deerfield, IL 60015 USA
USAHA-65-01-564
C 132
Bar Code
N(01)1 03 0338 3993 01 1
Lot:/Exp.:
JMXXX
JJJJ - MM
1 vial
NDC: 0338-3993-01
IFEX
(ifosfamide for injection, USP)
Single-Dose Vial
FOR IV USE
Rx only
3 g /vial
Baxter Logo
Manufactured by
Baxter Healthcare Corporation
Deerfield, IL 60015 USA
HA-80-02-154
USA
See bottom panel for lot
number and expiration date.
Baxter Logo
Manufactured by
Baxter Healthcare Corporation
Deerfield, IL 60015 USA
C
837
(01) 0030338993014
(21) XXXXXXXXXXXX
(17) JJMMTT
(10)JMXXXA
1 vial NDC: 0338-3993-01
IFEX
(Ifosfamide for injection, USP)
Single Dose Vial
Rx only
FOR IV USE
3 g /vial
Baxter Logo
Manufactured by
Baxter Healthcare Corporation
Deerfield, IL 60015 USA
Lot/Exp.:
JMXXXA
JJJJ - MM
2617B5079
Barcode
FOLDING BOX
CAN BE RECYCLED
symbol
This vial contains 3 g ifosfamide.
Add 60 mL Sterile Water for
Injection, USP, or Sterile
Bacteriostatic Water for Injection,
USP, (benzyl alcohol or parabens
preserved), shaking to dissolve,
for a reconstituted concentration
of 50 mg per mL.
READ ACCOMPANYING PACKAGE
INSERT for detailed indications,
dosage, and precautions.
Store at controlled room
temperature 20° C to 25° C
(68° F to 77° F). Protect from
temperatures above 30° C (86° F).
Constituted solutions should be
refrigerated and used within 24 hours.
Manufactured by:
Baxter Healthcare Corporation
Deerfield, IL 60015 USA
Made in Germany
IFEX
ifosfamide injection, powder, for solution |
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IFEX
ifosfamide injection, powder, for solution |
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Labeler - Bamboo US Bidco LCC (119087615) |
Establishment | |||
Name | Address | ID/FEI | Business Operations |
---|---|---|---|
Baxter Deutschland GmbH | 312520353 | api manufacture(83703-538, 83703-539) |
Mark Image Registration | Serial | Company Trademark Application Date |
---|---|
IFEX 79048500 3496257 Dead/Cancelled |
Insurance Futures Exchange Services Limited 2007-12-10 |
IFEX 77895596 3891310 Live/Registered |
SWIMC LLC 2009-12-17 |
IFEX 77480582 not registered Dead/Abandoned |
Chicago Climate Exchange, Inc. 2008-05-21 |
IFEX 75158906 2144118 Live/Registered |
IFEX TECHNOLOGIES GMBH 1996-08-30 |
IFEX 73793518 1575655 Dead/Cancelled |
INTERNATIONAL DESIGN CENTER, INC. 1989-04-17 |
IFEX 73701200 1496537 Live/Registered |
BRISTOL-MYERS COMPANY 1987-12-15 |