Generic Name: dexrazoxane hydrochloride
Dosage Form: injection, powder, lyophilized, for solution
Medically reviewed on February 1, 2018
Indications and Usage for Totect
Totect® is indicated for the treatment of extravasation resulting from intravenous anthracycline chemotherapy.
Totect Dosage and Administration
Vial contents and diluted with 50 mL of 0.167 M sodium lactate injection solution before use [see Dosage and Administration (2.3)].
Administer Totect once daily for 3 consecutive days. Initiate the first infusion as soon as possible and within the first six hours after extravasation [see Dosage and Administration (2.4)].
The individual dosage is based on calculation of the Body Surface Area (BSA) up to a maximum dose of 2000 mg (each on Day 1 and 2) and 1000 mg (Day 3), corresponding to a BSA of 2 m2.
|The recommended dose is:||Maximum daily dose:|
|Day one: 1000 mg/m2||2000 mg|
|Day two: 1000 mg/m2||2000 mg|
|Day three: 500 mg/m2||1000 mg|
Reduce the Totect dose by 50% in patients with creatinine clearance values < 40 mL/min.
Directions for Mixing and Final Dilution
Read this entire section carefully before mixing and diluting.
Aseptic technique should be used during preparation.
Use caution when handling and preparing the reconstituted solution. The use of gloves is recommended. If Totect powder or solutions contact the skin or mucosae, wash exposed area immediately and thoroughly with soap and water. Follow special handling and disposal procedures.1
Totect should not be mixed or administered with any other drug during the infusion.
Preparation of Totect
Step 1. Each vial of Totect (dexrazoxane for injection) (500 mg) must first be mixed with 50 mL of 0.167M sodium lactate injection solution.
Dilution of sodium lactate injection to 0.167M is required before using it to reconstitute Totect. Add 1.67 mL of 5 mEq/mL sodium lactate injection to 50 mL sterile water for injection to make 50 mL of 0.167M sodium lactate injection solution.
After reconstitution of Totect with 50 mL of 0.167M sodium lactate injection solution, the resultant Totect solution contains 10 mg/mL. This resultant solution should be further diluted within 2 hours. It contains no antibacterial preservative.
Step 2. Withdraw the recommended dose from the Totect solution containing 10 mg/mL as prepared in Step 1 and further dilute into an infusion bag containing 1000 mL 0.9% Sodium Chloride. In order to obtain the required dose, more than one vial may be needed. Totect must not be mixed with any other drugs.
The infusion bag should be used immediately after preparation. The product is stable for 4 hours from the time of preparation when stored below 25ºC (77ºF).
The solution of Totect is slightly yellow.
Parenteral drug products should be inspected visually for particulate matter prior to administration, whenever solution and container permit. Solutions containing a precipitate should be discarded. Vials are for single use only. Unused solution should be discarded.
Do not administer or mix Totect with any other drug during the infusion.
Remove cooling procedures such as ice packs, if used, from the extravasation area at least 15 minutes before Totect administration in order to allow sufficient blood flow to the area of extravasation.
Administer as an intravenous infusion over 1 to 2 hours at room temperature and normal light conditions in a large caliber vein in an extremity/area other than the one affected by the extravasation.
Treatment on Day 2 and Day 3 should start at the same hour (+/- 3 hours) as on the first day.
Perform local examination for extravasation on a regular basis after treatment and until resolution.
If vesicant compounds other than anthracyclines are being used through the same IV access, (e.g. vincristine, mitomycin, and vinorelbine), consider treatments for these other vesicant compounds. Totect is not effective against the effects of vesicants other than anthracyclines [see Clinical Studies (14)].
Dosage Forms and Strengths
For Injection: 500 mg as a sterile, pyrogen-free lyophilized powder in a single dose vial for reconstitution.
Warnings and Precautions
Treatment with Totect is associated with leukopenia, neutropenia, and thrombocytopenia. Grade 2-4 decreased white blood cells (73%), decreased neutrophils (61%), and decreased platelets (26%) occurred in patients treated with Totect and cytotoxic chemotherapy in clinical trials. Febrile neutropenia occurred in 2.5% of patients [see Adverse Reactions (6.1)].
Monitor complete blood counts during treatment with Totect and cytotoxic chemotherapy. The myelosuppression and cytotoxic potential of Totect and cytotoxic chemotherapy (with a nadir occurring on days 10-12) may be additive to that of the chemotherapy administered alone.
Hypersensitivity reactions including anaphylactic reaction, angioedema, skin reactions, bronchospasm, respiratory distress, hypotension and loss of consciousness have occurred in patients treated with dexrazoxane products and anthracyclines [see Adverse Reactions (6)]. Previous history of allergy to dexrazoxane products should be carefully considered prior to administration. Consider permanent discontinuation in patients with severe hypersensitivity reactions.
Totect can cause fetal harm when administered to a pregnant woman based on its mechanism of action and findings from animal studies. In animal reproduction studies, intravenous administration of dexrazoxane to pregnant rats and rabbits during organogenesis resulted in teratogenicity at maternal doses approximately 0.1 and 0.2 times, respectively, the human dose of 1000 mg/m2. Apprise pregnant women of the potential risk to a fetus. Advise females of reproductive potential to use effective contraception during treatment and for 6 months following the last dose of Totect. Advise males with female partners of reproductive potential to use effective contraception during treatment with Totect and for 3 months after the last dose [see Use in Specific Populations (8.1, 8.3) and Clinical Pharmacology (12.1)].
Clinical Trials Experience
Because clinical trials are conducted under widely varying conditions, the adverse reaction rates observed cannot be directly compared to rates in other trials and may not reflect the rates observed in clinical practice.
In the clinical studies, Totect was administered to patients also receiving chemotherapeutic agents for cancer, and the adverse reaction profile and laboratory abnormalities presented in Tables 1 and 2 reflect the combination of Totect, underlying disease, and already administered chemotherapy. The adverse reaction data reflect exposure to Totect from two clinical studies in 80 patients who received the first dose, 72 patients who received two doses, and 69 patients who received all three doses. Table 1 summarizes adverse reactions occurring with ≥ 5% frequency.
|System Organ Class (SOC) and Adverse Reaction||Study 1 and 2 Combined
|Total number of patients with at least one event||85|
|General disorders and administration site conditions||58|
|Injection site pain/injection site discomfort||16|
|Injection site phlebitis||6|
|Infections and infestations||30|
|Nervous system disorders||24|
|Skin and subcutaneous disorders||18|
|Respiratory, thoracic and mediastinal disorders||16|
|Blood and lymphatic system disorders||14|
|Musculoskeletal and connective tissue disorders||13|
|Metabolism and nutrition disorders
Table 2 summarizes laboratory abnormalities from studies 1 and 2.
|Laboratory Abnormality||Grade 3||Grade 4||Grade 2 to 4|
|Increased alkaline phosphatase||0||0||4|
|Increased calcium total||2||2||7|
Totect is not recommended for use with topical dimethyl sulfoxide (DMSO). Based on anecdotal reports concurrent use of topical DMSO at the site of tissue injury may reduce the benefit of Totect. Additionally, nonclinical studies using a mouse model that simulates extravasation of anthracyclines has shown that concomitant treatment with topical DMSO decreases the efficacy of systemic dexrazoxane.
USE IN SPECIFIC POPULATIONS
Based on findings from animal studies and its mechanism of action, Totect can cause fetal harm when administered to a pregnant woman [see Clinical Pharmacology (12.1)]. Limited available data with Totect use in pregnant women are insufficient to inform a drug-associated risk of adverse developmental outcomes. In animal reproduction studies, intravenous administration of dexrazoxane to pregnant rats and rabbits during organogenesis resulted in teratogenicity at maternal doses that were approximately 0.1 and 0.2 times, respectively, the human dose of 1000 mg/m² . Advise pregnant women of the potential risk to a fetus.
The estimated background risk of major birth defects and miscarriage for the indicated population is unknown. All pregnancies have a background risk of birth defect, loss, or other adverse outcomes. In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2%–4% and 15–20%, respectively.
In an embryo-fetal development study in rats, pregnant females received intravenous doses of up to 8 mg/kg dexrazoxane during the period of organogenesis. A dose of 8 mg/kg (approximately 0.1 times the human dose of 1000 mg/m²) was teratogenic, resulting in imperforate anus, microphthalmia, and anophthalmia. Doses ≥ 2 mg/kg (approximately 0.01 times the human dose of 1000 mg/m²) caused maternal toxicity.
In an embryo-fetal development study in rabbits, pregnant females received intravenous doses of up to 20 mg/kg (approximately 0.2 times the human dose of 1000 mg/m²) were teratogenic, resulting in several skeletal malformations such as short tail, rib and thoracic malformations, and soft tissue variations including subcutaneous, eye and cardiac hemorrhagic areas, as well as agenesis of the gallbladder and of the intermediate lobe of the lung. Doses ≥ 5 mg/kg (approximately 0.1 times the human dose of 1000 mg/m²) caused maternal toxicity.
In a pre and postnatal development study in rats, intravenous administration of 8 mg/kg dexrazoxane to pregnant rats during organogenesis resulted in impairment of fertility in the male and female offspring. A dose of 8 mg/kg in rats is approximately 0.1 times the human dose of 1000 mg/m².
There are no data on the presence of dexrazoxane in human milk, the effects on the breastfed child, or the effect on milk production. Because of the potential for serious adverse reactions, such as myelosuppression, in a breastfed child from Totect, advise women not to breastfeed during treatment and for 2 weeks following the final dose of Totect.
Females and Males of Reproductive Potential
Pregnancy testing should be performed prior to initiation of chemotherapy. Therefore, repeat pregnancy testing prior to administration of Totect is not recommended, because treatment of extravasation of anthracycline chemotherapy should not be delayed.
Totect can cause fetal harm when administered to a pregnant woman [see Warnings and Precautions (5.3), Use in Specific Populations (8.1)]. Because of the potential for genotoxicity, advise females of reproductive potential to use effective contraception during treatment and for 6 months following the final dose of Totect.
Because of the potential for genotoxicity, advise males with female partners of reproductive potential to use effective contraception during treatment and for 3 months following the final dose of Totect [see Nonclinical Toxicology (13.1)].
Based on findings in animal studies, Totect may impair fertility in males of reproductive potential. It is not known whether these effects on fertility are reversible [see Nonclinical Toxicology (13.1)].
The safety and effectiveness of Totect in pediatric patients have not been established.
In total, 21% of the patients treated with Totect were age 65 years or older and 9% were 75 and older. No differences in safety or efficacy were observed between older and younger patients, and other reported clinical experience has not identified differences in responses between the elderly and younger patients, but greater sensitivity of some older individuals cannot be ruled out.
This drug is 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 and hepatic function, care should be taken in dose selection, and it may be useful to monitor renal and hepatic function [see Dosage and Administration (2.2)].
Greater exposure to dexrazoxane may occur in patients with compromised renal function. Monitor patients with impaired renal function for signs of hematological toxicity. The Totect dose should be reduced by 50% in patients with creatinine clearance values < 40 mL/min. [see Dosage and Administration (2.2)]
Totect has not been studied in patients with hepatic impairment. Since liver dysfunction (increases in transaminases and bilirubin) may occur (especially after doses of above 1000 mg/m² dexrazoxane), it is recommended that routine liver function tests be performed before each administration of dexrazoxane in patients with known liver function disorders. Use in patients with hepatic impairment is not recommended.
Overdose with dexrazoxane can lead to signs of bone marrow failure. Treatment should be symptomatic. There is no known antidote for dexrazoxane.
Totect (dexrazoxane for injection) is a sterile, pyrogen-free lyophilized powder intended for intravenous (IV) administration. Each Totect carton contains 1 single dose vial of Totect (dexrazoxane for injection) 500 mg.
Chemically, dexrazoxane a cytoprotective agent, is 2,6-piperazinedione,4,4'-(1-methyl-1,2-ethanediyl)bis-,(S)- or (S)-(+)-1,2-bis(3,5-dioxopiperazin-1-yl)propane. The following diagram shows the chemical structure:
The molecular formula is C11H16N4O4; the molecular weight is 268.3. Dexrazoxane is a white to off-white powder, with a melting point of 194 ± 3 °C. It is soluble in dioxane and 0.1 N HCl, sparingly soluble in water, tetrahydrofuran, citrate buffer at pH 4.0, phosphate buffer at pH 7.0, and borate-potassium chloride sodium hydroxide buffer at pH 9.0. The acid dissociation constants, pKa, are 2.5 (for the tertiary piperazine nitrogen) and 9.7 (for the nitrogen imide). Log P is -2.135.
The finished product is supplied in a sterile form for intravenous infusion only following mixing and diluting.
Each carton contains one 50 mL Type I glass vial. Each vial contains dexrazoxane hydrochloride equivalent to 500 mg dexrazoxane (free base). Each vial of dexrazoxane for injection is closed with an aluminum flip-off cap covered with a dark red overcap.
When reconstituted as directed with 50 mL of sodium lactate injection solution (0.167 M), the admixture contains dexrazoxane (10 mg/mL) and the following excipients: hydrochloric acid, sodium lactate, water for injection, sodium hydroxide and lactic acid [see Dosage and Administration (2.4)]. The admixture should be further diluted in 0.9 % NaCl prior to administration to patients.
Totect - Clinical Pharmacology
Mechanism of Action
The mechanism by which Totect diminishes tissue damage resulting from the extravasation of anthracycline drugs is unknown. Some evidence suggests that dexrazoxane inhibits topoisomerase II reversibly.
The pharmacokinetics of dexrazoxane have been studied in advanced cancer patients with normal renal and hepatic function. Generally, the pharmacokinetics of dexrazoxane can be adequately described by a two-compartment open model with first-order elimination. Dexrazoxane has been administered as a 15 minute infusion over a dose-range of 60 to 900 mg/m² with 60 mg/m² of doxorubicin, and at a fixed dose of 500 mg/m² with 50 mg/m² doxorubicin. The disposition kinetics of dexrazoxane are dose-independent, as shown by linear relationship between the area under plasma concentration-time curves and administered doses ranging from 60 to 900 mg/m². The mean peak plasma concentration of dexrazoxane was 36.5 μg/mL at the end of the 15 minute infusion of a 500 mg/m² dose of dexrazoxane administered 15 to 30 minutes prior to the 50 mg/m² doxorubicin dose. The important pharmacokinetic parameters of dexrazoxane are summarized in the following table.
a Coefficient of variation
b Steady-state volume of distribution
|50||500||10||2.5 (16)||7.88 (18)||3.35 (36)||22.4 (22)|
|60||600||5||2.1 (29)||6.25 (31)||—||22.0 (55)|
Following a rapid distributive phase (~0.2 to 0.3 hours), dexrazoxane reaches post-distributive equilibrium within 2 to 4 hours. The estimated steady-state volume of distribution of dexrazoxane suggests its distribution primarily in the total body water (25 L/m²).
In a study of the pharmacokinetics of dexrazoxane following the recommended dosing for patients with anthracycline extravasation, the mean systemic clearance and steady-state volume of distribution of dexrazoxane in six female patients undergoing treatment for anthracycline extravasations at a dose of 1000 mg/m² Totect on Days 1 and 2 and 500 mg/m² on Day 3 were similar to that observed when administered with doxorubicin. The systemic clearances (mean ± SD) were similar among Day 1 (5.9 ± 2.0 L/h/m²), Day 2 (6.4 ± 2.1 L/h/m²), and Day 3 (7.9 ± 3.0 L/h/m²). The terminal elimination half life did not change over 3 days (2.1-2.2 h). The volume of distribution was 17.9 ~ 22.6 L/m².
In vitro studies on dexrazoxane in human microsomes indicated that metabolism is unlikely via cytochrome P450. Qualitative metabolism studies with dexrazoxane have confirmed the presence of unchanged drug, a diacid-diamide cleavage product, and two monoacid-monoamide ring products in the urine of animals and man. The metabolite levels were not measured in the pharmacokinetic studies.
Urinary excretion plays an important role in the elimination of dexrazoxane. Forty-two percent of the 500 mg/m² dose of dexrazoxane was excreted in the urine.
Protein Binding: In vitro studies have shown that dexrazoxane is not bound to plasma proteins.
Effects of Gender
There are no clinically relevant differences in the pharmacokinetics of dexrazoxane between males and females.
The pharmacokinetics of dexrazoxane were assessed following a single 15 minute IV infusion of 150 mg/m² of dexrazoxane in male and female subjects with varying degrees of renal dysfunction as determined by creatinine clearance (CLCR) based on a 24-hour urinary creatinine collection. Dexrazoxane clearance was reduced in subjects with renal dysfunction. Compared with controls, the mean AUC0-inf value was twofold greater in subjects with moderate (CLCR 30-50 mL/min) to severe (CLCR < 30 mL/min) renal dysfunction. Modeling demonstrated that equivalent exposure (AUC0-inf) could be achieved if dosing were reduced by 50% in subjects with creatinine clearance values < 40 mL/min compared with control subjects (CLCR > 80 mL/min) [see Dosage and Administration (2.2)]. Monitor patients with renal insufficiency for signs of hematological toxicity [see Use in Specific Populations (8.6)].
The pharmacokinetics of dexrazoxane have not been evaluated in patients with hepatic impairment.
In vitro studies indicated that dexazoxane is not an inhibitor for CYP1A, CYP2C9, CYP2C19, CYP2D6 or CYP3A.
In studies of dexrazoxane co-administrated with doxorubicin (50 to 60 mg/m²) or epirubicin (60 to 100 mg/m²), there were no indications of significant pharmacokinetic interactions.
Carcinogenesis, Mutagenesis, Impairment of Fertility
Carcinogenicity studies have not been conducted with dexrazoxane. A study by the National Cancer Institute has reported that long term dosing with razoxane (the racemic mixture of dexrazoxane, ICRF-187, and its enantiomer ICRF-186) is associated with the development of malignancies in rats and possibly in mice.
Dexrazoxane was not mutagenic to bacteria in vitro (Ames assay), but was clastogenic in an in vitro chromosomal aberrations study in mammalian cells and in an in vivo bone marrow micronucleus study in mice.
Fertility studies with dexrazoxane have not be conducted. Testicular atrophy was seen with intravenous dexrazoxane administration at doses as low as 30 mg/kg weekly for 6 weeks in rats (approximately 0.2 times the human dose of 1000 mg/m²) and as low as 20 mg/kg weekly for 13 weeks in dogs (approximately 0.4 times the human dose of 1000 mg/m²).
Totect was studied in two open-label, single arm, multi-center studies testing whether Totect administration could reduce tissue injury following anthracycline extravasation and thereby reduce or avoid surgical intervention. Totect is not effective against the effects of vesicants other than anthracyclines.
In the studies, eligible patients were receiving single-agent anthracycline intravenously (usually as part of combination chemotherapy) and developed extravasation symptoms of pain, burning, swelling, and/or redness near the infusion site. Skin biopsy samples from the suspected skin area were examined for the presence of anthracycline as determined by the presence of tissue fluorescence; however, therapy was not delayed for this test result.
In both studies, treatment with Totect was to begin as soon as possible and no later than 6 hours after extravasation with retreatment 24 and 48 hours later (a total of 3 doses). Totect was administered as 1-2 hour IV infusions through a different venous access location. The first and second doses were 1000 mg/m² and the third dose was 500 mg/m2. No dose modifications were planned except for patients whose body surface area exceeded 2.0 m², in which case the total daily dose limit on the first and second day was 2000 mg/day and 1000 mg on the third day.
In total, 80 patients were enrolled and 57 were evaluable. Demographics in the two studies were similar. The median age was 57 years, and sixty-five percent of patients were women. The anthracyclines most commonly associated with extravasation were epirubicin (56%) and doxorubicin (41%). Peripheral IV sites of extravasation included the forearm in 63%, the hand in 21%, and the antecubital area in 11%; four patients (5%) received the anthracycline via a central venous access device (CVAD). Most patients presented with swelling (83%), redness (78%), and pain (43%). The median baseline lesion area was 25 cm² (range 1-253 cm²).
Evaluable patients had to be receiving IV anthracycline (single agent or in combination) at the time of extravasation, to have skin biopsies showing fluorescence, and to receive the first Totect dose within 6 hours of the extravasation.
In study 1, none of the 19 evaluable patients required surgical intervention and none had serious late sequelae. In study 2, one of the 38 evaluable patients required surgery. One additional non-evaluable patient required surgery for tissue necrosis. Thirteen patients had late sequelae at the event site such as site pain, fibrosis, atrophy, and local sensory disturbance; all were judged as mild except in the one patient who required surgery. None of the 4 patients with CVADs required surgical intervention.
- "OSHA Hazardous Drugs." OSHA.
How Supplied/Storage and Handling
Each Totect carton contains 1 single dose vial of Totect (dexrazoxane for injection) 500 mg as a sterile, pyrogen-free lyophilized powder.
NDC 66220-110-01: Carton of 1 vial of Totect
Store at 25ºC (77ºF); excursions permitted between 15-30ºC (59-86ºF) [see USP Controlled Room Temperature]. Protect from light. Keep vial in carton until ready for use.
Follow special handling and disposal procedures [see Dosage and Administration (2.3)].1
Patient Counseling Information
See FDA-approved patient labeling (Patient Information)
Inform patients of the possibility of myelosuppression, immunosuppression, and infections. Explain the need for routine blood cell counts. Instruct patients to monitor their temperature frequently and immediately report any occurrence of fever [see Warnings and Precautions (5.1)].
Instruct patients to contact their healthcare provider for signs of an allergic reaction, which could be severe and sometimes fatal [see Warnings and Precautions (5.2)].
Advise females of reproductive potential and males with female partners of reproductive potential of the potential risk to a fetus. Advise females of reproductive potential to use effective contraception during treatment and for 6 months following the final dose of Totect. Advise females to inform their prescriber of a known or suspected pregnancy. Advise male patients with female partners of reproductive potential to use effective contraception during treatment and for 3 months following the final dose of Totect [see Warnings and Precautions (5.3) and Use in Specific Populations (8.1, 8.3)].
Advise women not to breastfeed during treatment and for 2 weeks following the final dose of Totect [see Use in Specific Populations (8.2)].
What is Totect?
Totect is a prescription medicine used to treat people when anthracycline chemotherapy leaks from your vein into the tissue around the intravenous (IV) site.
It is not known if Totect is safe and effective in children.
Before you receive Totect, tell your healthcare provider about all of your medical conditions, including if you:
Tell your healthcare provider about all the medicines you take, including prescription and over-the-counter medicines, vitamins, and herbal or dietary supplements.
Especially tell your healthcare provider if you use a medicine on the skin (topical) called dimethyl sulfoxide (DMSO). Using a topical DMSO during treatment with Totect may affect how well Totect works.
How will I receive Totect?
What are the possible side effects of Totect?
Totect can cause serious side effects, including:
o trouble breathing
|o dizziness or lightheadedness|
|o swelling of your face, lips, tongue or throat||o faint or pass out|
|o raised bumps (hives)|
Totect may cause fertility problems in males, which may affect the ability to father children. Talk to your healthcare provider if you have concerns about fertility.
These are not all the possible side effects of Totect. For more information, ask your healthcare provider or pharmacist.
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
General information about the safe and effective use of Totect.
Medicines are sometimes prescribed for purposes other than those listed in a Patient Information leaflet. If you would like more information, talk with your healthcare provider. You can ask your healthcare provider or pharmacist for information about Totect that is written for health professionals.
What are the ingredients in Totect?
Active ingredient: dexrazoxane
Inactive ingredients (when reconstituted with 50 mL of sodium lactate injection solution): hydrochloric acid, sodium lactate, water for injection, sodium hydroxide and lactic acid.
US Patent No 6,727,253 B2
Manufactured for: Cumberland Pharmaceuticals Inc. Nashville, TN USA 37203
Totect® is a registered trademark owned by the Clinigen Group.
For more information, call 1-877-484-2700.
This Patient Information has been approved by the U.S. Food and Drug Administration. Revised: 02/2018
PRINCIPAL DISPLAY PANEL - CARTON LABEL
(dexrazoxane) for injection
For Intravenous Infusion Only.
Important: Reconstitute with sodium lactate injection solution and further dilute with sodium chloride injection solution.
Single Dose Vial; Discard Unused Portion.
Cumberland Pharmaceuticals Oncology
dexrazoxane hydrochloride injection, powder, lyophilized, for solution
|Labeler - Cumberland Pharmaceuticals Inc. (069532880)|
|Alcami Wisconsin Corporation||054452136||api manufacture(66220-110)|
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