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CLARISCAN™
(gadoterate meglumine) Injection
WARNING
NEPHROGENIC SYSTEMIC FIBROSIS (NSF)
Gadolinium-based contrast agents (GBCAs) increase the risk for NSF among patients with impaired elimination of the drugs. Avoid use of GBCAs in these patients unless the diagnostic information is essential and not available with non-contrasted MRI or other modalities. NSF may result in fatal or debilitating fibrosis affecting the skin, muscle, and internal organs.
Clariscan (gadoterate meglumine) is a paramagnetic macrocyclic ionic contrast agent administered for magnetic resonance imaging. The chemical name for gadoterate meglumine is D-glucitol, 1-deoxy-1-(methylamino)-, [1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraaceto(4-)-.kappa.N1, .kappa.N4, .kappa.N7, .kappa.N10, .kappa.O1, .kappa.O4, .kappa.O7, .kappa.O10]gadolinate(1-)(1:1); it has a formula weight of 753.9 g/mol and empirical formula of C23H42O13N5 Gd (anhydrous basis).
The structural formula of gadoterate meglumine in solution is as follows:
 |
CAS Registry No. 92943-93-6
Clariscan Injection is a sterile, nonpyrogenic, clear, colorless to yellow, aqueous solution of 0.5 mmol/mL of gadoterate meglumine. Each vial contains 5 mmol per 10 mL, 7.5 mmol per 15 mL and 10 mmol per 20 mL. No preservative is added. Each mL of Clariscan contains 376.9 mg of gadoterate meglumine, 0.25 mg of DOTA and water for injection. Clariscan has a pH of 6.5 to 8.0.
The main physiochemical properties of Clariscan are provided below:
Table 4: Physicochemical Properties
| Parameter | Value |
| Density @ 20°C | 1.1753 g/cm³ |
| Viscosity @ 20 °C | 3.4 mPa.s |
| Viscosity @ 37°C | 2.4 mPa.s |
| Osmolality | 1350 mOsm/kg water |
The thermodynamic stability constants for gadoterate (log Ktherm and log Kcond at pH 7.4) are 25.6 and 19.3, respectively.
Clariscan is a gadolinium-based contrast agent indicated for intravenous use with magnetic resonance imaging (MRI) in brain (intracranial), spine and associated tissues in adult and pediatric patients to detect and visualize areas with disruption of the blood brain barrier (BBB) and/or abnormal vascularity.
Additional pediatric use information is approved for Guerbet, LLC's Dotarem (gadoterate meglumine injection). However, due to Guerbet LLC's marketing exclusivity, this drug product is not labeled with that pediatric information.
For adult and pediatric patients, the recommended dose of Clariscan is 0.2 mL/kg (0.1 mmol/kg) body weight administered as an intravenous bolus injection, manually or by power injector, at a flow rate of approximately 2 mL/second for adults and 1-2 mL/second for pediatric patients. Table 1 provides weight-adjusted dose volumes.
Table 1: Volumes of Clariscan Injection by Body Weight
| Body Weight | Volume Milliliters (mL) | |
| Pounds (lb) | Kilograms (kg) | |
| 22 | 10 | 2 |
| 44 | 20 | 4 |
| 66 | 30 | 6 |
| 88 | 40 | 8 |
| 110 | 50 | 10 |
| 132 | 60 | 12 |
| 154 | 70 | 14 |
| 176 | 80 | 16 |
| 198 | 90 | 18 |
| 220 | 100 | 20 |
| 242 | 110 | 22 |
| 264 | 120 | 24 |
| 286 | 130 | 26 |
| 308 | 140 | 28 |
| 330 | 150 | 30 |
To ensure complete injection of Clariscan, the injection may be followed by normal saline flush. Contrast MRI can begin immediately following Clariscan injection.
Additional pediatric use information is approved for Guerbet, LLC's Dotarem (gadoterate meglumine injection). However, due to Guerbet LLC's marketing exclusivity, this drug product is not labeled with that pediatric information.
Glass vial
Aseptically draw up the contrast medium into a disposable syringe and use immediately.
Clariscan 0.5 mmol/mL is a sterile, clear, colorless to yellow, aqueous solution for intravenous injection containing 376.9 mg/mL gadoterate meglumine and is available in vials.
Clariscan Injection is a clear, colorless to yellow solution containing 0.5 mmol/mL of gadoterate meglumine. It is supplied in vials.
Each single-dose vial is closed with a rubber stopper and sealed with an aluminum cap and the contents are sterile. Vials are individually packaged in a package of 10, in the following configurations:
5 mmol per 10 mL (0.5 mmol per mL) in glass vial (NDC 0407-2943-01)
7.5 mmol per 15 mL (0.5 mmol per mL) in glass vial (NDC 0407-2943-02)
10 mmol per 20 mL (0.5 mmol per mL) in glass vial (NDC 0407-2943-05)
Store at 25°C (77°F); excursions permitted to 15°C to 30°C (59°F to 86°F) [see USP, Controlled Room Temperature].
Should solidification occur in the vial because of exposure to the cold, bring Clariscan to room temperature before use. If allowed to stand at room temperature for a minimum of 90 minutes, Clariscan should return to a clear, colorless to yellow solution. Before use, examine the product to assure that all solids are dissolved and that the container and closure have not been damaged. Discard the vial if solids persist.
Distributed by : GE Healthcare Inc., Marlborough, MA 01752 U.S.A. Revised : Nov 2019
GBCAs have been associated with a risk for NSF [see WARNINGS AND PRECAUTIONS]. Confirmed diagnosis of NSF has not been reported in patients with a clear history of exposure to Clariscan alone.
Hypersensitivity reactions and acute kidney injury are described in other sections of the labeling [ see WARNINGS AND PRECAUTIONS].
Because clinical trials are conducted under 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 data described below reflect Clariscan exposure in 2822 patients, representing 2682 adults and 140 pediatric patients. Overall, 55% of the patients were men. In clinical trials where ethnicity was recorded, the ethnic distribution was 74% Caucasian, 12% Asian, 4% Black, and 10% others. The average age was 53 years (range from < 1 week to 97 years).
Overall, 4% of patients reported at least one adverse reaction, primarily occurring immediately or within 24 hours following Clariscan administration. Most adverse reactions were mild or moderate in intensity and transient in nature.
Table 2 lists adverse reactions that occurred in ≥ 0.2% patients who received Clariscan.
Table 2: Adverse Reactions in Clinical Trials
| Reaction | Rate (%) n= 2867 |
| Nausea | 0.6% |
| Headache | 0.4% |
| Injection Site Pain | 0.4% |
| Injection Site Coldness | 0.2% |
| Rash | 0.2% |
Adverse reactions that occurred with a frequency < 0.2% in patients who received Clariscan include: feeling cold, feeling hot, burning sensation, somnolence, pain, dizziness, dysgeusia, blood creatinine increased, hypotension, hypertension, asthenia, fatigue, injection site reactions (inflammation, extravasation, pruritus, swelling, warmth), paresthesia, pruritus, laryngeal discomfort, pain in extremity, vomiting, anxiety and palpitations.
During clinical trials, 140 pediatric patients (7 aged < 24 months, 33 aged 2 - 5 years, 57 aged 6 - 11 years and 43 aged 12 - 17 years) received Clariscan. Overall, 6 pediatric patients (4.3%) reported at least one adverse reaction following Clariscan administration. The most frequently reported adverse reaction was headache (1.1%). Most adverse events were mild in intensity and transient in nature.
Additional pediatric use information is approved for Guerbet, LLC's Dotarem (gadoterate meglumine injection). However, due to Guerbet LLC's marketing exclusivity, this drug product is not labeled with that pediatric information.
The following additional adverse reactions have been identified during postmarketing use of Clariscan. 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.
Table 3: Adverse Reactions in the Postmarketing
Experience
| System Organ Class | Adverse Reaction |
| Cardiac Disorders | bradycardia, tachycardia, arrhythmia |
| Immune System Disorders | hypersensitivity / anaphylactoid reactions including cardiac arrest, respiratory arrest, cyanosis, pharyngeal edema, laryngospasm, bronchospasm, angioedema, conjunctivitis, ocular hyperemia, eyelid edema, lacrimation increased, hyperhidrosis, urticaria |
| Nervous System Disorders | coma, convulsion, syncope, presyncope, parosmia, tremor |
| Musculoskeletal and Connective Tissue Disorders | muscle contracture, muscle weakness |
| Gastrointestinal Disorders | diarrhea, salivary hypersecretion |
| General Disorders and Administration Site Conditions | malaise, fever Adverse events with variable onset and duration have been reported after GBCA administration [ see WARNINGS AND PRECAUTIONS] . These include fatigue, asthenia, pain syndromes, and heterogeneous clusters of symptoms in the neurological, cutaneous, and musculoskeletal systems. |
| Skin and Subcutaneous Tissue Disorders | NSF, in patients whose reports were confounded by the receipt of other GBCAs or in situations where receipt of other GBCAs could not be ruled out. No unconfounded cases of NSF have been reported with Clariscan. Gadolinium-associated plaques. |
| Vascular Disorders | superficial phlebitis |
Gadoterate does not interfere with serum and plasma calcium measurements determined by colorimetric assays. Specific drug interaction studies with Clariscan have not been conducted.
Included as part of the PRECAUTIONS section.
Gadolinium-based contrast agents (GBCAs) increase the risk for nephrogenic systemic fibrosis (NSF) among patients with impaired elimination of the drugs. Avoid use of GBCAs among these patients unless the diagnostic information is essential and not available with non-contrast MRI or other modalities. The GBCA-associated NSF risk appears highest for patients with chronic, severe kidney disease (GFR < 30 mL/min/1.73 m²) as well as patients with acute kidney injury. The risk appears lower for patients with chronic, moderate kidney disease (GFR 30 - 59 mL/min/1.73 m²) and little, if any, for patients with chronic, mild kidney disease (GFR 60 - 89 mL/min/1.73 m²). NSF may result in fatal or debilitating fibrosis affecting the skin, muscle, and internal organs.
Report any diagnosis of NSF following Clariscan administration to GE Healthcare at (1-800-654-0118) or FDA at (1-800-FDA-1088 or www.fda.gov/medwatch ) .
Screen patients for acute kidney injury and other conditions that may reduce renal function. Features of acute kidney injury consist of rapid (over hours to days), and usually reversible, decrease in kidney function, commonly in the setting of surgery, severe infection, injury or drug-induced kidney toxicity. Serum creatinine levels and estimated GFR may not reliably assess renal function in the setting of acute kidney injury. For patients at risk for chronically reduced renal function (e.g., age > 60 years, diabetes mellitus or chronic hypertension), estimate the GFR through laboratory testing.
The factors that may increase the risk for NSF are repeated or higher than recommended doses of a GBCA, and the degree of renal impairment at the time of exposure. Record the specific GBCA and the dose administered to a patient. For patients at highest risk for NSF, do not exceed the recommended Clariscan dose and allow a sufficient period of time for elimination of the drug prior to re-administration. For patients receiving hemodialysis, physicians may consider the prompt initiation of hemodialysis following the administration of a GBCA in order to enhance the contrast agent's elimination. The usefulness of hemodialysis in the prevention of NSF is unknown [see DOSAGE AND ADMINISTRATION and CLINICAL PHARMACOLOGY].
Anaphylactic and anaphylactoid reactions have been reported with Clariscan, involving cardiovascular, respiratory, and/or cutaneous manifestations. Some patients experienced circulatory collapse and died. In most cases, initial symptoms occurred within minutes of Clariscan administration and resolved with prompt emergency treatment [see ADVERSE REACTIONS].
Gadolinium is retained for months or years in several organs. The highest concentrations (nanomoles per gram of tissue) have been identified in the bone, followed by other organs (e.g. brain, skin, kidney, liver and spleen). The duration of retention also varies by tissue and is longest in bone. Linear GBCAs cause more retention than macrocyclic GBCAs. At equivalent doses, gadolinium retention varies among the linear agents with Omniscan (gadodiamide) and Optimark (gadoversetamide) causing greater retention than other linear agents [Eovist (gadoxetate disodium), Magnevist (gadopentetate dimeglumine), MultiHance (gadobenate dimeglumine)]. Retention is lowest and similar among the macrocyclic GBCAs [Clariscan (gadoterate meglumine), Dotarem (gadoterate meglumine), Gadavist (gadobutrol), ProHance (gadoteridol)].
Consequences of gadolinium retention in the brain have not been established. Pathologic and clinical consequences of GBCA administration and retention in skin and other organs have been established in patients with impaired renal function [see Nephrogenic Systemic Fibrosis]. There are rare reports of pathologic skin changes in patients with normal renal function. Adverse events involving multiple organ systems have been reported in patients with normal renal function without an established causal link to gadolinium retention [see ADVERSE REACTIONS].
While clinical consequences of gadolinium retention have not been established in patients with normal renal function, certain patients might be at higher risk. These include patients requiring multiple lifetime doses, pregnant and pediatric patients, and patients with inflammatory conditions. Consider the retention characteristics of the agent when choosing a GBCA for these patients. Minimize repetitive GBCA imaging studies, particularly closely spaced studies when possible.
In patients with chronically reduced renal function, acute kidney injury requiring dialysis has occurred with the use of GBCAs. The risk of acute kidney injury may increase with increasing dose of the contrast agent; administer the lowest dose necessary for adequate imaging. Screen all patients for renal impairment by obtaining a history and/or laboratory tests. Consider follow-up renal function assessments for patients with a history of renal dysfunction.
Ensure catheter and venous patency before the injection of Clariscan. Extravasation into tissues during Clariscan administration may result in tissue irritation [see Nonclinical Toxicology].
Instruct patients to inform their healthcare provider if they:
GBCAs increase the risk for NSF among patients with impaired elimination of the drugs. To counsel patients at risk for NSF:
Instruct the patients to contact their physician if they develop signs or symptoms of NSF following Clariscan administration, such as burning, itching, swelling, scaling, hardening and tightening of the skin; red or dark patches on the skin; stiffness in joints with trouble moving, bending or straightening the arms, hands, legs or feet; pain in the hip bones or ribs; or muscle weakness.
Inform patients that they may experience:
Long-term animal studies have not been performed to evaluate the carcinogenic potential of gadoterate meglumine.
Gadoterate meglumine did not demonstrate mutagenic potential in in vitro bacterial reverse mutation assays (Ames test) using Salmonella typhimurium, in an in vitro chromosome aberration assay in Chinese hamster ovary cells, in an in vitro gene mutation assay in Chinese hamster lung cells, nor in an in vivo mouse micronucleus assay.
No impairment of male or female fertility and reproductive performance was observed in rats after intravenous administration of gadoterate meglumine at the maximum tested dose of 10 mmol/kg/day (16 times the maximum human dose based on surface area), given during more than 9 weeks in males and more than 4 weeks in females. Sperm counts and sperm motility were not adversely affected by treatment with the drug.
GBCAs cross the human placenta and result in fetal exposure and gadolinium retention. The human data on the association between GBCAs and adverse fetal outcomes are limited and inconclusive (see Data) . In animal reproduction studies, there were no adverse developmental effects observed in rats or rabbits with intravenous administration of gadoterate meglumine during organogenesis at doses up to 16 and 10 times, respectively, the recommended human dose (see Data). Because of the potential risks of gadolinium to the fetus, use Clariscan only if imaging is essential during pregnancy and cannot be delayed.
The estimated background risk of major birth defects and miscarriage for the indicated population(s) are 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.
Human Data
Contrast enhancement is visualized in the placenta and fetal tissues after maternal GBCA administration.
Cohort studies and case reports on exposure to GBCAs during pregnancy have not reported a clear association between GBCAs and adverse effects in the exposed neonates. However, a retrospective cohort study, comparing pregnant women who had a GBCA MRI to pregnant women who did not have an MRI, reported a higher occurrence of stillbirths and neonatal deaths in the group receiving GBCA MRI. Limitations of this study include a lack of comparison with non-contrast MRI and lack of information about the material indication for MRI. Overall, these data preclude a reliable evaluation of the potential risk of adverse fetal outcomes with the use of GBCAs in pregnancy.
Animal Data
Gadolinium Retention
GBCAs administered to pregnant non-human primates (0.1 mmol/kg on gestational days 85 and 135) result in measurable gadolinium concentration in the offspring in bone, brain, skin, liver, kidney, and spleen for at least 7 months. GBCAs administered to pregnant mice (2 mmol/kg daily on gestational days 16 through 19) result in measurable gadolinium concentrations in the pups in bone, brain, kidney, liver, blood, muscle, and spleen at one-month postnatal age.
Reproductive Toxicology
Gadoterate meglumine was administered in intravenous doses of 0, 2, 4 and 10 mmol/kg/day [3, 7 and 16 times the recommended human dose (RHD) based on body surface area (BSA)] to female rats for 14 days before mating, throughout the mating period and until gestation day (GD) 17. Pregnant rabbits were administered gadoterate meglumine in intravenous doses levels of 0, 1, 3 and 7 mmol/kg/day (3, 10 and 23 times the RHD based on BSA) from GD6 to GD19. No effects on embryo-fetal development were observed at doses up to 10 mmol/kg/day in rats or 3 mmol/kg/day in rabbits. Maternal toxicity was observed in rats at 10 mmol/kg/day and in rabbits at 7 mmol/kg/day. This maternal toxicity was characterized in rats by a slightly lower litter size and gravid uterus weight compared to the control group, and in rabbits by a reduction in body weight and food consumption.
There are no data on the presence of gadoterate in human milk, the effects on the breastfed infant, or the effects on milk production. However, published lactation data on other GBCAs indicate that 0.01 to 0.04% of the maternal gadolinium dose is present in breast milk. Additionally, there is limited GBCA gastrointestinal absorption in the breastfed infant. Gadoterate is present in goat milk ( see Data). The developmental and health benefits of breastfeeding should be considered along with the mother's clinical need for Clariscan and any potential adverse effects on the breastfed infant from Clariscan or from the underlying maternal condition.
Nonclinical data demonstrate that gadoterate is detected in goat milk in amounts < 0.1% of the dose intravenously administered. Furthermore, in rats, absorption of gadoterate via the gastrointestinal tract is poor (1.2% of the administered dose was absorbed and eliminated in urine).
The safety and efficacy of Clariscan at a single dose of 0.1 mmol/kg have been established in pediatric patients from 2 to 17 years of age based on clinical data in 133 pediatric patients 2 years of age and older. Adverse reactions in pediatric patients were similar to those reported in adults [see ADVERSE REACTIONS] . No dosage adjustment according to age is necessary in pediatric patients [See DOSAGE AND ADMINISTRATION, Pharmacokinetics] . The safety of Clariscan has not been established in preterm neonates.
No cases of NSF associated with Clariscan or any other GBCA have been identified in pediatric patients age 6 years and younger [see WARNINGS AND PRECAUTIONS] . Normal estimated GFR (eGFR) is approximately 30 mL/minute/1.73 m² at birth and increases to adult values by 2 years of age.
Single and repeat-dose toxicity studies in neonatal and juvenile rats did not reveal findings suggestive of a specific risk for use in pediatric patients.
Additional pediatric use information is approved for Guerbet, LLC's Dotarem (gadoterate meglumine injection). However, due to Guerbet LLC's marketing exclusivity, this drug product is not labeled with that pediatric information.
In clinical studies of Clariscan, 900 patients were 65 years of age and over, and 304 patients were 75 years of age and over. No overall differences in safety or efficacy were observed between these subjects and younger subjects. In general, use of Clariscan in elderly patients should be cautious, reflecting the greater frequency of impaired renal function and concomitant disease or other drug therapy. No age-related dosage adjustment is necessary.
No Clariscan dosage adjustment is recommended for patients with renal impairment. Gadoterate meglumine can be removed from the body by hemodialysis [see WARNINGS AND PRECAUTIONS and CLINICAL PHARMACOLOGY].
Clariscan administered to healthy volunteers and to adult patients at cumulative doses up to 0.3 mmol/kg was tolerated in a manner similar to lower doses. Adverse reactions to overdosage with Clariscan have not been reported. Gadoterate meglumine can be removed from the body by hemodialysis [See CLINICAL PHARMACOLOGY].
History of clinically important hypersensitivity reactions to Clariscan [see WARNINGS AND PRECAUTIONS].
Gadoterate is a paramagnetic molecule that develops a magnetic moment when placed in a magnetic field. The magnetic moment enhances the relaxation rates of water protons in its vicinity, leading to an increase in signal intensity (brightness) of tissues.
In magnetic resonance imaging (MRI), visualization of normal and pathological tissue depends in part on variations in the radiofrequency signal intensity that occurs with:
When placed in a magnetic field, gadoterate shortens the T1 and T2 relaxation times in target tissues. At recommended doses, the effect is observed with greatest sensitivity in the T1-weighted sequences.
Gadoterate affects proton relaxation times and consequently the MR signal, and the contrast obtained is characterized by the relaxivity of the gadoterate molecule. The relaxivity values for gadoterate are similar across the spectrum of magnetic field strengths used in clinical MRI (0.2-1.5 T).
Disruption of the blood-brain barrier or abnormal vascularity allows distribution of gadoterate in lesions such as neoplasms, abscesses, and infarcts.
The pharmacokinetics of total gadolinium assessed up to 48 hours following an intravenously administered 0.1 mmol/kg dose of Clariscan in healthy adult subjects demonstrated a mean elimination half-life (reported as mean ± SD) of about 1.4 ± 0.2 hours and 2.0 ± 0.7 hours in female and male subjects, respectively. Similar pharmacokinetic profile and elimination half-life values were observed after intravenous injection of 0.1 mmol/kg of Clariscan followed 20 minutes later by a second injection of 0.2 mmol/kg (1.7 ± 0.3 hours and 1.9 ± 0.2 hours in female and male subjects, respectively).
The volume of distribution at steady state of total gadolinium in normal subjects is 179 ± 26 and 211 ± 35 mL/kg in female and male subjects respectively, roughly equivalent to that of extracellular water. Gadoterate does not undergo protein binding in vitro . The extent of blood cell partitioning of gadoterate is not known.
Following GBCA administration, gadolinium is present for months or years in brain, bone, skin, and other organs [see WARNINGS AND PRECAUTIONS].
Metabolism
Gadoterate is not known to be metabolized.
Elimination
Following a 0.1 mmol/kg dose of Clariscan, total gadolinium is excreted primarily in the urine with 72.9 ± 17.0% and 85.4 ± 9.7% (mean ± SD) eliminated within 48 hours, in female and male subjects, respectively. Similar values were achieved after a cumulative dose of 0.3 mmol/kg (0.1 + 0.2 mmol/kg, 20 minutes later), with 85.5 ± 13.2% and 92.0 ± 12.0% recovered in urine within 48 hours in female and male subjects, respectively.
In healthy subjects, the renal and total clearance rates of total gadolinium are comparable (1.27 ± 0.32 and 1.74 ± 0.12 mL/min/kg in females; and 1.40 ± 0.31 and 1.64 ± 0.35 mL/min/kg in males, respectively) indicating that the drug is primarily cleared through the kidneys. Within the studied dose range (0.1 to 0.3 mmol/kg), the kinetics of total gadolinium appear to be linear.
A single intravenous dose of 0.1 mmol/kg of Clariscan was administered to 8 patients (5 men and 3 women) with impaired renal function (mean serum creatinine of 498 ± 98 μmol/L in the 10-30 mL/min creatinine clearance group and 192 ± 62 μmol/L in the 30-60 mL/min creatinine clearance group). Renal impairment delayed the elimination of total gadolinium. Total clearance decreased as a function of the degree of renal impairment. The distribution volume was unaffected by the severity of renal impairment (Table 5). No changes in renal function test parameters were observed after Clariscan injection. The mean cumulative urinary excretion of total gadolinium was approximately 76.9 ± 4.5% in 48 hours in patients with moderate renal impairment, 68.4 ± 3.5% in 72 hours in patients with severe renal impairment and 93.3 ± 4.7% in 24 hours for subjects with normal renal function.
Table 5: Pharmacokinetic Profile of Total Gadolinium
in Normal and Renally Impaired Patients
| Population | Elimination Half-life (hr) | Plasma Clearance (L/h/kg) | Distribution Volume (L/kg) |
| Healthy volunteers | 1.6 ± 0.2 | 0.10 ± 0.01 | 0.246 ± 0.03 |
| Patients with moderate renal impairment | 5.1 ± 1.0 | 0.036 ± 0.007 | 0.236 ± 0.01 |
| Patients with severe renal impairment | 13.9 ± 1.2 | 0.012 ± 0.001 | 0.234 ± 0.01 |
Gadoterate was shown to be dialyzable after an IV injection of Clariscan in 10 patients with end-stage renal failure who required hemodialysis treatment. Gd serum concentration decreased over time by 88%, 93% and 97% at 0.5 hours, 1.5 hours, and 4 hours after start of dialysis, respectively. A second and third hemodialysis session further removed Gd. After the third dialysis, Gd serum concentration decreased by 99.7%.
Additional pediatric use information is approved for Guerbet, LLC's Dotarem (gadoterate meglumine injection). However, due to Guerbet LLC's marketing exclusivity, this drug product is not labeled with that pediatric information.
Local intolerance reactions, including moderate irritation associated with infiltration of inflammatory cells were observed after perivenous injection in rabbits suggesting the possibility of local irritation if the contrast medium leaks around the veins in a clinical setting [see WARNINGS AND PRECAUTIONS].
Toxicity of gadoterate meglumine was evaluated in neonatal and juvenile (pre- and post-weaning) rats following a single or repeated intravenous administration at doses 1, 2, and 4 times the MHD based on BSA. Gadoterate meglumine was well tolerated at all dose levels tested and had no effect on growth, pre-weaning development, behavior and sexual maturation.
Efficacy and safety of Clariscan were evaluated in a multi-center clinical trial (Study A) that enrolled 364 adult and 38 pediatric patients (aged ≥ 2 years) with known or suspected CNS lesions. Adults were randomized 2 to 1 to receive either Clariscan or gadopentetate dimeglumine, each administered at a dose of 0.1 mmol/kg. All pediatric patients received Clariscan, also at a dose of 0.1 mmol/kg. In the trial, patients first underwent a baseline (pre-contrast) MRI examination followed by the assigned GBCA administration and a post-contrast MR examination. The images (pre-contrast, post-contrast and “paired pre- and post-contrast”) were interpreted by three independent off-site readers blinded to clinical information. The primary efficacy analysis compared three patient-level visualization scores (paired images) to baseline MRI (pre-contrast images) for adults who received Clariscan. The three primary visualization components were: contrast enhancement, border delineation and internal morphology. For each of these components there was a pre-defined scoring scale. Lesion counting (up to five per patient) was also reflected within each component's patient-level visualization score.
Among the adult patients, 245 received Clariscan and their data comprised the primary efficacy population. There were 114 (47%) men and 131 (53%) women with a mean age of 53 years (range 18 to 85 years), the racial and ethnic representations were 84% Caucasian, 11% Asian, 4% Black, and 1% other.
Table 6 displays a comparison of paired images (pre-and post-contrast) to pre-contrast images with respect to the proportion of patients who had paired image scores that were greater “better”, or same/worse “not better” than the pre- contrast scores and with respect to the difference in the mean patient level visualization score. Across the three readers 56% to 94% of patients had improved lesion visualization for paired images compared to pre-contrast images. Clariscan provided a statistically significant improvement for all three primary visualization components. More lesions were seen on the paired images than the pre-contrast images.
Table 6: Study A. Improvement in Patient-level Lesion
Visualization Scores, Paired versus Pre-contrast Images*
| Lesion Scores | Reader 1 | Reader 2 | Reader 3 |
| n = 231 | n = 232 | n = 237 | |
| Border Delineation | |||
| Better | 195 (84%) | 215 (93%) | 132 (56%) |
| Not Better | 28 (12%) | 7 (3%) | 88 (37%) |
| Missing | 8 (4%) | 10 (4%) | 17 (7%) |
| Difference in Mean Score† | 2.26‡ | 2.89‡ | 1.17‡ |
| Internal Morphology | |||
| Better | 218 (94%) | 214 (93%) | 187 (79%) |
| Not Better | 5 (2%) | 8 (3%) | 33 (14%) |
| Missing | 8 (4%) | 10 (4%) | 17 (7%) |
| Difference in Mean Score† | 2.74‡ | 2.75‡ | 1.54‡ |
| Contrast Enhancement | |||
| Better | 208 (90%) | 216 (93%) | 208 (88%) |
| Not Better | 15 (6%) | 6 (3%) | 12 (5%) |
| Missing | 8 (4%) | 10 (4%) | 17 (7%) |
| Difference in Mean Score† | 3.09‡ | 3.69‡ | 2.92‡ |
| *Better: number of patients with paired (pre-and
post-contrast) score greater than the pre-contrast score Not better: number of
patients with paired score same as or worse than the pre-contrast score Missing:
number of patients with missing score †Difference = paired mean score minus pre-contrast mean score ‡Statistically significant improvement by paired t-test |
|||
In secondary analyses, post-contrast images were improved in comparison to pre-contrast images. Clariscan lesion visualization scores were similar to those for gadopentetate dimeglumine. Clariscan imaging results in the pediatric patients were also similar to those seen in adults.
In a second clinical trial (Study B), MR images were reread from 150 adult patients with known CNS lesions who had participated in a previously conducted clinical trial. Clariscan administration and image interpretation was performed in the same manner as in Study A. Similar to Study A, this trial also demonstrated improved lesion visualization with Clariscan.
Additional pediatric use information is approved for Guerbet, LLC's Dotarem (gadoterate meglumine injection). However, due to Guerbet LLC's marketing exclusivity, this drug product is not labeled with that pediatric information.
CLARISCAN™
(kla-ri'-skan)
(gadoterate meglumine) injection for intravenous use
What is Clariscan?
What is the most important information I should know about Clariscan?
Do not receive Clariscan if you have had a severe allergic reaction to Clariscan.
Before receiving Clariscan, tell your healthcare provider about all your medical conditions, including if you:
What are possible side effects of Clariscan?
The most common side effects of Clariscan include: nausea, headache, pain, or cold feeling at the injection site, and rash.
These are not all the possible side effects of Clariscan.
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 uses of Clariscan.
Medicines are sometimes prescribed for purposes other than those listed in a Medication Guide. You can ask your healthcare provider for information about Clariscan that is written for health professionals.
What are the ingredients in Clariscan?
Active ingredient: gadoterate meglumine
Inactive ingredients: DOTA, water for injection
This Medication Guide has been approved by the U.S. Food and Drug Administration.
