Platinol

Patient Information

Nephrotoxicity

Inform patients that cisplatin for injection can cause nephrotoxicity and that renal function and electrolyte monitoring during treatment is necessary. If indicated, inform patients about the use of electrolyte supplements [see WARNINGS AND PRECAUTIONS].

Peripheral Neuropathy

Advise patients to report any new paresthesias to their healthcare provider [see WARNINGS AND PRECAUTIONS].

Nausea And Vomiting

Advise patients concerning the use of antiemetics to prevent nausea and vomiting and to report persistent or severe symptoms to their healthcare provider [see WARNINGS AND PRECAUTIONS].

Myelosuppression

Advise patients that cisplatin for injection can reduce the absolute neutrophil count and the platelet count resulting in an increased risk of infection and bleeding and to contact their healthcare provider for new onset fever, symptoms of infection, or bleeding [see WARNINGS AND PRECAUTIONS].

Ototoxicity

Advise patients to report any symptoms of hearing loss or vestibular dysfunction to their healthcare provider and that periodic monitoring of hearing may be performed [see WARNINGS AND PRECAUTIONS].

Embryo-Fetal Toxicity

• Advise females of reproductive potential of the potential risk to a fetus and to inform their healthcare provider if they are pregnant or become pregnant [see WARNINGS AND PRECAUTIONS and Use In Specific Populations].
• Advise females of reproductive potential to use effective contraception during treatment and for 14 months following the last dose of cisplatin for injection [see Use In Specific Populations].
• Advise male patients with female partners of reproductive potential to use effective contraception during treatment and for 11 months following the last dose of cisplatin for injection [see Use In Specific Populations].

Lactation

Advise females not to breastfeed during treatment with cisplatin for injection [see Use In Specific Populations].

Infertility

Inform patients that treatment with cisplatin for injection may lead to permanent impairment of spermatogenesis, ovarian failure or premature menopause, and reduced fertility in both genders [see Use In Specific Populations].

Alopecia

Inform patients that cisplatin for injection can cause alopecia.

Description

PLATINOL® (cisplatin for injection, USP) is a white to light yellow lyophilized powder. Each vial of PLATINOL contains 50 mg cisplatin, 450 mg Sodium Chloride, USP, and 500 mg Mannitol, USP.

The active ingredient, cisplatin, is a yellow to orange crystalline powder with the molecular formula PtCl₂H₆N₂, and a molecular weight of 300.1. Cisplatin is a heavy metal complex containing a central atom of platinum surrounded by two chloride atoms and two ammonia molecules in the cis position. It is soluble in water or saline at 1 mg/mL and in dimethylformamide at 24 mg/mL. It has a melting point of 207° C

 

Indications

Advanced Testicular Cancer

Cisplatin for injection is indicated for the treatment of advanced testicular cancer.

Advanced Ovarian Cancer

Cisplatin for injection is indicated for the treatment of advanced ovarian cancer.

Advanced Bladder Cancer

Cisplatin for injection is indicated for the treatment of advanced bladder cancer.

Dosage And Admintisration

Hydration And Anti-Emetic Treatment

Patients treated with cisplatin for injection must receive appropriate pre-treatment hydration. Maintain adequate hydration and urinary output for 24 hours after cisplatin for injection administration [see WARNINGS AND PRECAUTIONS]. Administer pre-treatment and post-treatment antiemetics as appropriate [see WARNINGS AND PRECAUTIONS].

Advanced Testicular Cancer

Cisplatin for injection has been administered at 20 mg/m² intravenously daily for 5 days per cycle. Other doses and combination regimens have been used.

Advanced Ovarian Cancer

Cisplatin for injection has been administered at 75 mg/m² to 100 mg/m² intravenously per cycle once every 3 to 4 weeks on Day 1. Other doses and combination regimens have been used.

Advanced Bladder Cancer

Cisplatin for injection has been administered at 50 mg/m² to 70 mg/m² intravenously per cycle once every 3 to 4 weeks. For heavily pretreated patients, an initial dose of 50 mg/m² per cycle repeated every 4 weeks is recommended. Other doses and combination in regimens have been used.

Dose Modifications

Consider alternative treatments or dose reductions for patients with impaired creatinine clearance, myelosuppression, or neuropathy. Consider permanent discontinuation for Grade 3-4 neuropathy. [see WARNINGS AND PRECAUTIONS].

Preparation, Handling, And Administration

Do not use needles or intravenous sets containing aluminum parts that can come in contact with cisplatin for injection during preparation or administration. Aluminum reacts with cisplatin for injection, causing precipitate formation and a loss of potency.

Cisplatin for injection is a cytotoxic drug. Follow applicable special handling and disposable procedures.¹

Reconstitution

Reconstitute 50 mg vials with 50 mL of Sterile Water for Injection, USP. Each mL of the resulting solution will contain 1 mg of cisplatin for injection. Reconstitution results in a clear or colorless to slight yellow solution. Do not refrigerate the reconstituted solution. Parenteral drug products should be inspected visually for particulate matter and discoloration prior to administration, whenever solution and container permit. The reconstituted solution is stable for 20 hours at controlled room temperature [20°C to 25°C (68°F to 77°F)]. Solution removed from the amber vial should be protected from light if it is not to be used within six hours.

Dilution

For preparation of the infusion solution, it is recommended that the reconstituted solution be further diluted in 1 to 2 L of a compatible infusion solution with or without 37.5 g of mannitol. Refer to detailed references for specific infusion solution stability and compatibility information.

Administration

Administer cisplatin for injection by slow intravenous infusion.

How Supplied

Dosage Forms And Strengths

Cisplatin for injection, USP: single-dose vials containing 50 mg of cisplatin as white to light yellow lyophilized powder for reconstitution.

Storage And Handling

Cisplatin for injection, USP

NDC 44567-530-01 – Each single-dose amber vial contains 50 mg of cisplatin as a white to light yellow lyophilized powder for reconstitution.

Storage

Store at 20°C to 25°C (68°F to 77°F); excursions permitted to 15°C to 30°C (59°F to 86°F) [see USP Controlled Room Temperature]. Prior to reconstitution, store in original carton to protect from light. Discard unused portion.

Handling And Disposal

Cisplatin for injection, USP is a cytotoxic drug. Follow applicable special handling and disposal procedures.¹

REFERENCES

1. OSHA Hazardous Drugs. OSHA. http://www.osha.gov/SLTC/hazardousdrugs/index.html

Manufactured for: WG Critical Care, LLC, Paramus, NJ 07652. Revised: Feb 2019

Side Effects

The following adverse reactions are described in greater detail, in other sections:

• Nephrotoxicity [see WARNINGS AND PRECAUTIONS]
• Peripheral Neuropathy [see WARNINGS AND PRECAUTIONS]
• Nausea and vomiting [see WARNINGS AND PRECAUTIONS]
• Myelosuppression [see WARNINGS AND PRECAUTIONS]
• Hypersensitivity reactions [see WARNINGS AND PRECAUTIONS]
• Ototoxicity [see WARNINGS AND PRECAUTIONS]
• Ocular toxicity [see WARNINGS AND PRECAUTIONS]
• Secondary malignancies [see WARNINGS AND PRECAUTIONS]
• Injection site reactions [see WARNINGS AND PRECAUTIONS]

Common adverse reactions are nephrotoxicity, peripheral neuropathy, nausea and vomiting myelosuppression, and ototoxicity. The following adverse reactions have been identified from clinical trials or post-marketing surveillance.

Blood and lymphatic system disorders: Coombs-positive hemolytic anemia. hemolytic uremic syndrome, thrombotic thrombocytopenic purpura

Cardiovascular disorders: Venous thromboembolism, arterial thromboembolism, myocardial infarction, cerebrovascular accident, thrombotic microangiopathy, cerebral arteritis, pericardial effusion, cardiac failure, ventricular dysfunction, Raynaud’s phenomenon

Eye disorders: Optic neuritis, papilledema, cortical blindness, blurred vision, color blindness, retinal pigmentation

Gastrointestinal disorders: Nausea, vomiting, anorexia, diarrhea, stomatitis, gastrointestinal perforation, pancreatitis, hiccups

General disorders: Asthenia, malaise

Hepatobiliary disorders: Elevations of aminotransferases, lactate dehydrogenase, and bilirubin; hepatic failure

Hypersensitivity: Anaphylaxis, facial edema, wheezing, tachycardia, and hypotension

Local Site Reactions: Tissue cellulitis, fibrosis, necrosis, pain, edema, and erythema

Metabolism and nutrition disorders: Hypomagnesemia, often requiring magnesium supplementation; hyperuricemia, other electrolyte abnormalities (hypocalcemia, hyponatremia, hypokalemia, and hypophosphatemia), Syndrome of Inappropriate Antidiuretic Hormone Excretion (SIADH), dehydration, tumor lysis syndrome, increased serum amylase

Musculoskeletal disorders: Muscle cramps (localized, painful, involuntary skeletal muscle contractions of sudden onset and short duration)

Nervous system disorders: Peripheral neuropathy, Encephalopathy, loss of motor function, loss of taste, leukoencephalopathy, reversible posterior leukoencephalopathy syndrome, progressive multifocal leukoencephalopathy, seizures, Lhermitte’s sign, dorsal column myelopathy, autonomic neuropathy, seizures, involuntary skeletal muscle contractions, tetany (with hypocalcemia and hypomagnesemia)

Ototoxicity: Tinnitus, hearing loss, deafness, vestibular toxicity

Renal and urinary disorders: Nephrotoxicity including renal failure, renal electrolyte wasting, azotemia, decreased creatinine clearance

Respiratory disorders: pneumonitis/interstitial lung disease, pulmonary embolism

Skin and subcutaneous tissue disorders: Alopecia, rash

Drug Interactions

The following drug interactions are described in other sections:

• Nephrotoxic drugs [see WARNINGS AND PRECAUTIONS]
• Ototoxic drugs [see WARNINGS AND PRECAUTIONS]

WarningS

Included as part of the PRECAUTIONS section.

Precautions

Nephrotoxicity

Cisplatin for injection can cause dose-related nephrotoxicity, including acute renal failure that becomes more prolonged and severe with repeated courses of the drug. Renal toxicity typically begins during the second week after a dose of cisplatin for injection. Patients with baseline renal impairment, geriatric patients, patients who are taking other nephrotoxic drugs, or patients who are not well hydrated may be more susceptible to nephrotoxicity [see Use In Specific Populations].

Ensure adequate hydration before, during, and after cisplatin for injection administration [see DOSAGE AND ADMINISTRATION]. Measure serum creatinine, blood urea nitrogen, creatinine clearance, and serum electrolytes including magnesium prior to initiating therapy, and as clinically indicated. Consider magnesium supplementation as clinically needed.

Consider alternative treatments or reduce the dose of cisplatin for injection for patients with baseline renal impairment or who develop significant reductions in creatinine clearance during treatment with cisplatin for injection according to clinical treatment guidelines [see DOSAGE AND ADMINISTRATION].

Peripheral Neuropathy

Cisplatin for injection can cause dose-related peripheral neuropathy that becomes more severe with repeated courses of the drug. Neurologic symptoms have been reported to occur after a single dose. Neuropathy can also have a delayed onset from 3 to 8 weeks after the last dose of cisplatin for injection. Manifestations include paresthesias in a stocking-glove distribution, areflexia, and loss of proprioception and vibratory sensation. The neuropathy may progress further even after stopping treatment. Peripheral neuropathy may be irreversible in some patients.

Perform a neurological examination before initiating cisplatin for injection, at appropriate intervals during therapy, and after completion of therapy. Consider discontinuation of cisplatin for injection for patients who develop symptomatic peripheral neuropathy. Geriatric patients may be more susceptible to peripheral neuropathy [see Use In Specific Populations].

Nausea And Vomiting

Cisplatin for injection is a highly emetogenic antineoplastic agent. Premedicate with anti-emetic agents [see DOSAGE AND ADMINISTRATION]. Without antiemetic therapy, marked nausea and vomiting occur in almost all patients treated with cisplatin for injection and may be so severe that the drug must be discontinued. Nausea and vomiting may begin within 1 to 4 hours after treatment and last up to 72 hours. Maximal intensity occurs 48 to 72 hours after administration. Various degrees of vomiting, nausea, and/or anorexia may persist for up to 1 week after treatment. Delayed nausea and vomiting (begins or persists 24 hours or more after chemotherapy) has occurred in patients attaining complete emetic control on the day of cisplatin for injection therapy. Consider the use of additional anti-emetics following infusion.

Myelosuppression

Myelosuppression suppression occurs in 25% to 30% of patients treated with cisplatin for injection. Fever and infection have been reported in patients with neutropenia. Potential fatalities due to infection (secondary to myelosuppression) have been reported. Geriatric patients may be more susceptible to myelosuppression [see Use In Specific Populations].

Perform standard hematologic tests before initiating cisplatin for injection, before each subsequent course, and as clinically indicated. Closely monitor patients for the development of signs and symptoms of infection during and after treatment with cisplatin for injection. For patients who develop severe myelosuppression during treatment with cisplatin for injection, consider dose modifications and manage according to clinical treatment guidelines.

Hypersensitivity Reactions

Cisplatin for injection can cause severe hypersensitivity reactions, including anaphylaxis and death. Manifestations have included facial edema, wheezing, tachycardia, and hypotension. Hypersensitivity reactions have occurred within minutes of administration to patients with prior exposure to cisplatin for injection.

Monitor patients receiving cisplatin for injection for possible hypersensitivity reactions. Ensure supportive equipment and medications are available to treat severe hypersensitivity reactions. Severe hypersensitivity reactions require immediate discontinuation of cisplatin for injection and aggressive therapy. Patients with a history of severe hypersensitivity reactions should not be rechallenged with cisplatin for injection [see CONTRAINDICATIONS]. Cross-reactivity between platinum-based antineoplastic agents has been reported. Cases of severe hypersensitivity reactions have recurred after rechallenging patients with a different platinum agent.

Ototoxicity

Cisplatin for injection can cause ototoxicity, which is cumulative and may be severe. Consider audiometric and vestibular function monitoring.

Ototoxicity is manifested by tinnitus, hearing loss in the high frequency range (4,000 to 8,000 Hz) and/or decreased ability to hear normal conversational tones. Ototoxicity can occur during or after treatment and can be unilateral or bilateral. Deafness after the initial dose of cisplatin for injection has been reported. Vestibular toxicity has also been reported.

Ototoxic effects can be more severe and detrimental in pediatric patients, particularly in patients less than 5 years of age. The prevalence of hearing loss in pediatric patients is estimated to be 40-60%. Additional risk factors for ototoxicity include simultaneous cranial irradiation, treatment with other ototoxic drugs and renal impairment. Consider audiometric and vestibular testing in all pediatric patients receiving cisplatin [see Use In Specific Populations].

Genetic factors (e.g. variants in the thiopurine S-methyltransferase [TPMT] gene) may also contribute to the cisplatin-induced ototoxicity; although this association has not been consistent across populations and study designs.

Ocular Toxicity

Optic neuritis, papilledema, and cortical blindness have been reported in patients receiving standard recommended doses of cisplatin for injection. Blurred vision and altered color perception have been reported after the use of regimens with higher doses and dose frequencies of cisplatin for injection. The altered color perception manifests as a loss of color discrimination, particularly in the blue-yellow axis and irregular retinal pigmentation of the macular area on fundoscopic exam. Improvement and/or total recovery usually occurs after discontinuing cisplatin for injection but can be delayed.

Secondary Malignancies

The development of acute leukemia secondary to the use of cisplatin for injection has been reported. In these reports, cisplatin for injection was generally given in combination with other leukemogenic agents.

Embryo-Fetal Toxicity

Based on human data, cisplatin for injection can cause fetal harm when administered to a pregnant woman. Advise pregnant women and females of reproductive potential of the potential risk to a fetus. Advise females of reproductive potential to use effective contraception during treatment and for 14 months after the last dose of cisplatin for injection. Advise male patients with female partners of reproductive potential to use effective contraception during treatment and for 11 months after the last dose of cisplatin for injection [see Use In Specific Populations].

Injection Site Reactions

Injection site reactions can occur during the administration of cisplatin for injection. Local soft tissue toxicity has been reported following extravasation of cisplatin for injection. Severity of the local tissue toxicity appears to be related to the concentration of the cisplatin for injection solution. Infusion of solutions with a cisplatin for injection concentration greater than 0.5 mg/mL may result in tissue cellulitis, fibrosis, necrosis, pain, edema, and erythema.

Because of the possibility of extravasation, closely monitor the infusion site during drug administration.

Nonclinical Toxicology

Carcinogenesis, Mutagenesis, Impairment Of Fertility

The carcinogenic effect of cisplatin for injection was studied in BDIX rats. Cisplatin for injection was administered three times a week at 1 mg/kg body weight intraperitoneally to 50 BDIX rats for 3 weeks. Four hundred fifty-five days after the first application, 33 animals died, 13 of them related to malignancies (12 leukemias and 1 renal fibrosarcoma) [see WARNINGS AND PRECAUTIONS].

Cisplatin is mutagenic in the bacteria reverse mutation (Ames) test and produces chromosome aberrations in mammalian cells.

Use In Specific Populations

Pregnancy

Risk Summary

Based on human data from published literature, cisplatin for injection can cause fetal harm when administered to pregnant women. Advise pregnant women and females of reproductive potential of the potential risk to a fetus. Data demonstrates transplacental transfer of cisplatin. Exposure of pregnant women to cisplatin-containing chemotherapy has been associated with oligohydramnios, intrauterine growth restriction, and preterm birth. Cases of neonatal acute respiratory distress syndrome, cytopenias, and hearing loss have been reported. Cisplatin for injection administration to animals during and after organogenesis resulted in teratogenicity. A published study in mice showed placental transfer of cisplatin increased with placenta maturation.

The background risk of major birth defects and miscarriage for the indicated populations are unknown. However, the background risk in the U.S. general population of major birth defects is 2-4% and of miscarriage is 15-20% of clinically recognized pregnancies.

Lactation

Risk Summary

Limited data from published literature report the presence of cisplatin in human milk in low amounts. Because of the potential for serious adverse reactions from cisplatin for injection in a breastfed child and because of the potential for tumorigenicity shown for cisplatin for injection, advise lactating women not to breastfeed during treatment with cisplatin for injection.

Females And Males Of Reproductive Potential

Pregnancy Testing

Verify the pregnancy status of females of reproductive potential prior to initiation of cisplatin for injection.

Contraception

Females

Cisplatin for injection can cause fetal harm when administered to a pregnant woman [see Use In Specific Populations]. Advise females of reproductive potential to use effective contraception during treatment and for 14 months following the last dose of cisplatin for injection.

Males

Advise male patients with female partners of reproductive potential to use effective contraception during treatment and for 11 months after the last dose of cisplatin for injection.

Infertility

Females

The use of cisplatin has been associated with cumulative dose-dependent ovarian failure, premature menopause, and reduced fertility.

Males

The use of cisplatin has been associated with a cumulative dose-dependent impairment of spermatogenesis (oligospermia, azoospermia; possibly irreversible) and reduced fertility.

Pediatric Use

Ototoxic effects may be more severe and detrimental in pediatric patients receiving cisplatin for injection, particularly in patients less than 5 years of age. Consider audiometric and vestibular function monitoring in all patients receiving cisplatin for injection. The prevalence of hearing loss in pediatric patients is particularly high and is estimated to be 40% to 60%.

Earlier detection of hearing loss can limit the potential impact of hearing impairment on a pediatric patient’s cognitive and social development [see WARNINGS AND PRECAUTIONS].

Geriatric Use

For the treatment of metastatic testicular tumors or advanced bladder cancer, clinical studies of cisplatin for injection did not include sufficient numbers of subjects aged 65 and over to determine whether they respond differently from younger subjects. In four clinical trials of combination chemotherapy for advanced ovarian carcinoma, 1,484 patients received cisplatin either in combination with cyclophosphamide or with paclitaxel. Of these, 426 (29%) were older than 65 years. In these trials, age was not found to be a prognostic factor for survival. However, in a later secondary analysis for one of these trials, geriatric patients were found to have shorter survival compared with younger patients.

In all four trials, geriatric patients experienced more severe neutropenia than did younger patients. Higher incidences of severe thrombocytopenia and leukopenia were also seen in geriatric patients compared with younger patients, although not in all cisplatin-containing treatment arms. In the two trials where nonhematologic toxicity was evaluated according to age, geriatric patients had a numerically higher incidence of peripheral neuropathy than did younger patients. Other reported clinical experience suggests that geriatric patients may be more susceptible to nephrotoxicity, myelosuppression, and infectious complications than are younger patients [see WARNINGS AND PRECAUTIONS].

Cisplatin is known to be substantially excreted by the kidney. Because elderly patients are more likely to have decreased renal function, care should be taken in dose selection, and renal function should be monitored.

Use In Patients With Renal Impairment

Patients with baseline renal impairment may be more susceptible to nephrotoxicity [see WARNINGS AND PRECAUTIONS]. Ensure adequate hydration before, during, and after cisplatin for injection administration [see DOSAGE AND ADMINISTRATION]. Measure serum creatinine, blood urea nitrogen, creatinine clearance, and serum electrolytes prior to initiating therapy, and as clinically indicated. Consider alternative treatments or reduce the dose of cisplatin for injection for patients with baseline renal impairment or who develop significant reductions in creatinine clearance during treatment with cisplatin for injection according to clinical treatment guidelines [see DOSAGE AND ADMINISTRATION].

Overdose

Acute overdosage with cisplatin for injection may result in renal failure, hepatic failure, hearing loss, ocular toxicity, myelosuppression, nausea and vomiting, and neuritis. In addition, death can occur following overdosage.

Management of overdosage should include general supportive measures to sustain the patient through any period of toxicity that may occur. Important measures include renal protection by intravenous hydration with or without the use of an osmotic diuretic. Hemodialysis is not effective because of the high degree of protein binding of cisplatin for injection. Plasmapheresis has been used to treat cases of cisplatin for injection overdosage, but the optimal treatment regimen has not been established.

For current information on the management of poisoning or overdosage, contact the National Poison Control Center at 1-800-222-1222 or www.poison.org.

Contraindications

Cisplatin for injection is contraindicated in patients with severe hypersensitivity to cisplatin [see WARNINGS AND PRECAUTIONS].

Mechanism Of Action

The main mechanism of the cytotoxic action involves the binding of cisplatin to genomic DNA in the cell nucleus to form interstrand and intrastrand cross-links. This interferes with normal transcription and/or DNA replication mechanisms and triggers cytotoxic processes that lead to cell death.

Pharmacokinetics

Distribution

Cisplatin dose not undergo the instantaneously and reversible binding to plasma protein that is characteristic of normal drug-protein binding. Platinum from cisplatin, but not cisplatin itself, becomes bound to several plasma proteins, including albumin, transferrin, and gamma globulin. Three hours after a bolus injection and 2 hours after the end of a 3-hour infusion, 90% of the plasma platinum is protein bound. The complexes between albumin and the platinum from cisplatin do not dissociate to a significant extent and are slowly eliminated with a minimum half-life of 5 days or more.

Following cisplatin doses of 20 mg/m² to 120 mg/m², platinum is present in tissues for as long as 180 days after the last administration. With the exception of intracerebral tumors, platinum concentrations in tumors are generally somewhat lower than the concentrations in the organ where the tumor is located. Hepatic metastases have the highest platinum concentrations, but these are similar to the platinum concentrations in normal liver. Maximum red blood cell concentrations of platinum are reached within 90 to 150 minutes after a 100 mg/m² dose of cisplatin and decline in a biphasic manner with a terminal half-life of 36 to 47 days.

Metabolism

The chlorine atoms of cisplatin are more subject to chemical displacement reactions by nucleophiles, such as water or sulfhydryl groups, than to enzyme-catalyzed metabolism. At physiological pH, the predominant molecular species are cisplatin and monohydroxymonochloro cis-diamine platinum (II) in nearly equal concentrations. The latter, combined with the possible direct displacement of the chlorine atoms by sulfhydryl groups of amino acids or proteins, accounts for the instability of cisplatin in biological matrices. The ratios of cisplatin to total free (ultrafilterable) platinum in the plasma vary considerably between patients and range from 0.5 to 1.1 after a dose of 100 mg/m².

Elimination

Over a dose range of 40 mg to 140 mg cisplatin per m² given as a bolus injection or as infusions varying in length from 1 hour to 24 hours, from 10% to about 40% of the administered platinum is excreted in the urine in 24 hours. Over 5 days following administration of 40 mg/m² to 100 mg/m² doses given as rapid, 2-to 3-hour or 6-to 8-hour infusions, a mean of 35% to 51% of the dosed platinum is excreted in the urine. Similar mean urinary recoveries of platinum of about 14% to 30% of the dose are found following 5 daily administrations of 20 mg/m² per day, 30 mg/m² per day, or 40 mg/m² per day. Only a small percentage of the administered platinum is excreted beyond 24 hours post-infusion and most of the platinum excreted in the urine in 24 hours is excreted within the first few hours.

The parent compound, cisplatin, is excreted in the urine and accounts for 13% to 17% of the dose excreted within 1 hour after administration of 50 mg/m². The mean renal clearance of cisplatin exceeds creatinine clearance and was 62 mL/min per m² and 50 mL/min per m² following administration of 100 mg/m² as 2-hour or 6-to 7-hour infusions, respectively.

Plasma concentrations of the parent compound, cisplatin, decrease monoexponentially with a half-life of about 20 to 30 minutes following bolus administrations of 50 mg/m² or 100 mg/m² doses. Monoexponential decreases and plasma half-lives of about 0.5 hour are also seen following 2-hour or 7-hour infusions of 100 mg/m². After the latter, the total body clearances and volumes of distribution at steady-state for cisplatin are about 15 Liters per hour per m² to 16 Liters per hour per m² and 11 Liters per m² to 12 Liters per m².

The renal clearance of free (ultrafilterable) platinum also exceeds the glomerular filtration rate, indicating that cisplatin or other platinum-containing molecules are actively secreted by the kidneys. The renal clearance of free platinum is nonlinear and variable and is dependent on dose, urine flow rate, and individual variability in the extent of active secretion and possible tubular reabsorption.

No significant relationships exist between the renal clearance of either free platinum or cisplatin and creatinine clearance.