Cathflo Activase Prescribing Information

Drug Detail:Cathflo activase (Alteplase [ al-te-plase ])

Powder for reconstitution for use in central venous access devices

Cathflo Activase Description

Cathflo® Activase® (Alteplase) is a tissue plasminogen activator (t‑PA) produced by recombinant DNA technology. It is a sterile, purified glycoprotein of 527 amino acids. It is synthesized using the complementary DNA (cDNA) for natural human tissue‑type plasminogen activator (t‑PA) obtained from an established human cell line. The manufacturing process involves secretion of the enzyme Alteplase into the culture medium by an established mammalian cell line (Chinese hamster ovary cells) into which the cDNA for Alteplase has been genetically inserted.

Cathflo Activase (Alteplase) for injection is a sterile, white to pale yellow, lyophilized powder for intracatheter instillation for restoration of function to central venous access devices following reconstitution with Sterile Water for Injection, USP.

Each vial of Cathflo Activase contains 2.2 mg of Alteplase (which includes a 10% overfill), 77 mg of L‑arginine, 0.2 mg of polysorbate 80, and phosphoric acid for pH adjustment. Each reconstituted vial will deliver 2 mg of Cathflo Activase, at a pH of approximately 7.3.

Cathflo Activase - Clinical Pharmacology

Alteplase is an enzyme (serine protease) that has the property of fibrin-enhanced conversion of plasminogen to plasmin. It produces limited conversion of plasminogen in the absence of fibrin. Alteplase binds to fibrin in a thrombus and converts the entrapped plasminogen to plasmin, thereby initiating local fibrinolysis (1).

In patients with acute myocardial infarction administered 100 mg of Activase as an accelerated intravenous infusion over 90 minutes, plasma clearance occurred with an initial half‑life of less than 5 minutes and a terminal half‑life of 72 minutes. Clearance is mediated primarily by the liver (2).

When Cathflo Activase is administered for restoration of function to central venous access devices according to the instructions in DOSAGE AND ADMINISTRATION, circulating plasma levels of Alteplase are not expected to reach pharmacologic concentrations. If a 2 mg dose of Alteplase were administered by bolus injection directly into the systemic circulation (rather than instilled into the catheter), the concentration of circulating Alteplase would be expected to return to endogenous circulating levels of 5–10 ng/mL within 30 minutes (1).

Clinical Studies

Three clinical studies were performed in patients with improperly functioning central venous access devices (CVADs).

A placebo‑controlled, double‑blind, randomized trial (Trial 1) and a larger open‑label trial (Trial 2) investigated the use of Alteplase in predominately adult patients who had an indwelling CVAD for administration of chemotherapy, total parenteral nutrition, or long‑term administration of antibiotics or other medications. Both studies enrolled patients whose catheters were not functioning (defined as the inability to withdraw at least 3 mL of blood from the device) but had the ability to instill the necessary volume of study drug. Patients with hemodialysis catheters or a known mechanical occlusion were excluded from both studies. Also excluded were patients considered at high risk for bleeding or embolization (see PRECAUTIONS, Bleeding), as well as patients who were younger than 2 years old or weighed less than 10 kg. Restoration of function was assessed by successful withdrawal of 3 mL of blood and infusion of 5 mL of saline through the catheter.

Trial 1 tested the efficacy of a 2 mg/2 mL Alteplase dose in restoring function to occluded catheters in 150 patients with catheter occlusion up to 24 hours in duration. Patients were randomized to receive either Alteplase or placebo instilled into the lumen of the catheter, and catheter function was assessed at 120 minutes. Restoration of function was assessed by successful withdrawal of 3 mL of blood and infusion of 5 mL of saline through the catheter. All patients whose catheters did not meet these criteria were then administered Alteplase, until function was restored or each patient had received up to two active doses. After the initial dose of study agent, 51 (67%) of 76 patients randomized to Alteplase and 12 (16%) of 74 patients randomized to placebo had catheter function restored. This resulted in a treatment‑associated difference of 51% (95% CI is 37% to 64%). A total of 112 (88%) of 127 Alteplase‑treated patients had restored function after up to two doses.

Trial 2 was an open‑label, single arm trial in 995 patients with catheter dysfunction and included patients with occlusions present for any duration. Patients were treated with Alteplase with up to two doses of 2 mg/2 mL (less for children who weighed less than 30 kg, see DOSAGE AND ADMINISTRATION) instilled into the lumen of the catheter. Assessment for restoration of function was made at 30 minutes after each instillation. If function was not restored, catheter function was re‑assessed at 120 minutes. Thirty minutes after instillation of the first dose, 516 (52%) of 995 patients had restored catheter function. One hundred twenty minutes after the instillation of the first dose, 747 (75%) of 995 patients had restored catheter function. If function was not restored after the first dose, a second dose was administered. Two hundred nine patients received a second dose. Thirty minutes after instillation of the second dose, 70 (33%) of 209 patients had restored catheter function. One hundred twenty minutes after the instillation of the second dose, 97 (46%) of 209 patients had restored catheter function. A total of 844 (85%) of 995 patients had function restored after up to 2 doses.

Across Trials 1 and 2, 796 (68%) of 1043 patients with occlusions present for less than 14 days had restored function after one dose, and 902 (88%) had function restored after up to two doses. Of 53 patients with occlusions present for longer than 14 days, 30 (57%) patients had function restored after a single dose, and a total of 38 patients (72%) had restored function after up to two doses.

Three hundred forty-six patients who had successful treatment outcome were evaluated at 30 days after treatment. The incidence of recurrent catheter dysfunction within this period was 26%.

Trial 3 was an open‑label, single‑arm trial in 310 patients between the ages of 2 weeks and 17 years. All patients had catheter dysfunction defined as the inability to withdraw blood (at least 3 mL for patients ≥ 10 kg or at least 1 mL for patients < 10 kg). Catheter dysfunction could be present for any duration. The indwelling CVADs (single-, double-, and triple‑lumen, and implanted ports) were used for administration of chemotherapy, blood products or fluid replacement, total parenteral nutrition, antibiotics, or other medications. Patients with hemodialysis catheters or known mechanical occlusions were excluded from the study, as were patients considered at high risk for bleeding or embolization. Patients were treated with up to two doses of Cathflo Activase instilled into the catheter lumen. For patients weighing ≥ 30 kg, the dose was 2 mg in 2 mL. For patients weighing < 30 kg, the dose was 110% of the estimated internal lumen volume, not to exceed 2 mg in 2 mL. Restoration of function was assessed at 30 and 120 minutes (if required) after administration of each dose. Restoration of function was defined as the ability to withdraw fluid (3 mL in patients ≥ 10 kg; 1 mL in patients < 10 kg) and infuse saline (5 mL in patients ≥ 10 kg; 3 mL in patients < 10 kg).

The overall rate of catheter function restoration of 83% (257 of 310) was similar to that observed in Trial 2, as were the rates of function restoration at the intermediate assessments.

The three trials had similar rates of catheter function restoration among the catheter types studied (single-, double-, and triple‑lumen, and implanted ports). No gender differences were observed in the rate of catheter function restoration. Results were similar across all age subgroups.

Indications and Usage for Cathflo Activase

Cathflo® Activase® (Alteplase) is indicated for the restoration of function to central venous access devices as assessed by the ability to withdraw blood.

Contraindications

Cathflo Activase should not be administered to patients with known hypersensitivity to Alteplase or any component of the formulation (see DESCRIPTION).

Warnings

None.

Precautions

General

Catheter dysfunction may be caused by a variety of conditions other than thrombus formation, such as catheter malposition, mechanical failure, constriction by a suture, and lipid deposits or drug precipitates within the catheter lumen. These types of conditions should be considered before treatment with Cathflo Activase.

Because of the risk of damage to the vascular wall or collapse of soft‑walled catheters, vigorous suction should not be applied during attempts to determine catheter occlusion.

Excessive pressure should be avoided when Cathflo Activase is instilled into the catheter. Such force could cause rupture of the catheter or expulsion of the clot into the circulation.

Bleeding

The most frequent adverse reaction associated with all thrombolytics in all approved indications is bleeding (3,4). Cathflo Activase has not been studied in patients known to be at risk for bleeding events that may be associated with the use of thrombolytics. Caution should be exercised with patients who have active internal bleeding or who have had any of the following within 48 hours: surgery, obstetrical delivery, percutaneous biopsy of viscera or deep tissues, or puncture of non‑compressible vessels. In addition, caution should be exercised with patients who have thrombocytopenia, other hemostatic defects (including those secondary to severe hepatic or renal disease), or any condition for which bleeding constitutes a significant hazard or would be particularly difficult to manage because of its location, or who are at high risk for embolic complications (e.g., venous thrombosis in the region of the catheter). Death and permanent disability have been reported in patients who have experienced stroke and other serious bleeding episodes when receiving pharmacologic doses of a thrombolytic.

Should serious bleeding in a critical location (e.g., intracranial, gastrointestinal, retroperitoneal, pericardial) occur, treatment with Cathflo Activase should be stopped and the drug should be withdrawn from the catheter.

Infections

Cathflo Activase should be used with caution in the presence of known or suspected infection in the catheter. Using Cathflo Activase in patients with infected catheters may release a localized infection into the systemic circulation (see ADVERSE REACTIONS). As with all catheterization procedures, care should be used to maintain aseptic technique.

Hypersensitivity

Hypersensitivity, including urticaria, angioedema and anaphylaxis, has been reported in association with use of Cathflo Activase. Monitor patients treated with Cathflo Activase for signs of hypersensitivity and treat appropriately if necessary.

Re-Administration

In clinical trials, patients received up to two 2 mg/2 mL doses (4 mg total) of Alteplase. Additional re-administration of Cathflo Activase has not been studied. Antibody formation in patients receiving one or more doses of Cathflo Activase for restoration of function to CVADs has not been studied.

Drug Interactions

The interaction of Cathflo Activase with other drugs has not been formally studied. Concomitant use of drugs affecting coagulation and/or platelet function has not been studied.

Drug/Laboratory Test Interactions

Potential interactions between Cathflo Activase and laboratory tests have not been studied.

Carcinogenesis, Mutagenesis, Impairment of Fertility

Long‑term studies in animals have not been performed to evaluate the carcinogenic potential or the effect on fertility. Short-term studies that evaluated tumorigenicity of Alteplase and effect on tumor metastases were negative in rodents. Studies to determine mutagenicity (Ames test) and chromosomal aberration assays in human lymphocytes were negative at all concentrations tested. Cytotoxicity, as reflected by a decrease in mitotic index, was evidenced only after prolonged exposure at high concentrations exceeding those expected to be achieved with Cathflo Activase.

Pregnancy

Alteplase has been shown to have an embryocidal effect due to an increased postimplantation loss rate in rabbits when administered intravenously during organogenesis at a dose (3 mg/kg) approximately 50 times human exposure (based on AUC) at the dose for restoration of function to occluded CVADs. No maternal or fetal toxicity was evident at a dose (1 mg/kg) approximately 16 times human exposure at the dose for restoration of function to occluded CVADs.

There are no adequate and well‑controlled studies in pregnant women. Cathflo Activase should be used during pregnancy only if the potential benefit justifies the potential risk to the fetus.

Nursing Mothers

It is not known whether Cathflo Activase is excreted in human milk. Because many drugs are excreted in human milk, caution should be exercised when Cathflo Activase is administered to a nursing woman.

Pediatric Use

A total of 432 subjects under age 17 have received Cathflo Activase in the three trials. Rates of serious adverse events were similar in the pediatric and adult patients, as were the rates of catheter function restoration.

Geriatric Use

In 312 patients enrolled who were age 65 years and over, no incidents of intracranial hemorrhage (ICH), embolic events, or major bleeding events were observed. One hundred three of these patients were age 75 years and over, and 12 were age 85 years and over. The effect of Alteplase on common age-related comorbidities has not been studied. In general, caution should be used in geriatric patients with conditions known to increase the risk of bleeding (see PRECAUTIONS, Bleeding).

Adverse Reactions/Side Effects

The following adverse reactions are discussed in greater detail in Section PRECAUTIONS of the label:

Bleeding
Hypersensitivity

In the clinical trials, the most serious adverse events reported after treatment were sepsis (see PRECAUTIONS, Infections), gastrointestinal bleeding, and venous thrombosis.

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 practice.

Trials 1 and 2

The data described for Trials 1 and 2 reflect exposure to Cathflo Activase in 1122 patients, of whom 880 received a single dose and 242 received two sequential doses of Cathflo Activase.

In the Cathflo Activase Trials 1 and 2, only limited, focused types of serious adverse events were recorded, including death, major hemorrhage, intracranial hemorrhage, pulmonary or arterial emboli, and other serious adverse events not thought to be attributed to underlying disease or concurrent illness. Major hemorrhage was defined as severe blood loss ( > 5 mL/kg), blood loss requiring transfusion, or blood loss causing hypotension. Non‑serious adverse events and serious events thought to be due to underlying disease or concurrent illness were not recorded. Patients were observed for serious adverse events until catheter function was deemed to be restored or for a maximum of 4 or 6 hours depending on study. For most patients the observation period was 30 minutes to 2 hours. Spontaneously reported deaths and serious adverse events that were not thought to be related to the patient's underlying disease were also recorded during the 30 days following treatment.

Four catheter-related sepsis events occurred from 15 minutes to 1 day after treatment with Alteplase, and a fifth sepsis event occurred on Day 3 after Alteplase treatment. All 5 patients had positive catheter or peripheral blood cultures within 24 hours after symptom onset.

Three patients had a major hemorrhage from a gastrointestinal source from 2 to 3 days after Alteplase treatment. One case of injection site hemorrhage was observed at 4 hours after treatment in a patient with pre-existing thrombocytopenia. These events may have been related to underlying disease and treatments for malignancy, but a contribution to occurrence of the events from Alteplase cannot be ruled out. There were no reports of intracranial hemorrhage.

Three cases of subclavian and upper extremity deep venous thrombosis were reported 3 to 7 days after treatment. These events may have been related to underlying disease or to the long-term presence of an indwelling catheter, but a contribution to occurrence of the events from Alteplase treatment cannot be ruled out. There were no reports of pulmonary emboli.

There were no gender-related differences observed in the rates of adverse reactions. Adverse reactions profiles were similar across all age subgroups.

Trial 3

In Trial 3 all serious adverse events were recorded with a specific interest in intracranial hemorrhage, major hemorrhage, thrombosis, embolic events, sepsis and catheter related complications. Major hemorrhage was defined as severe blood loss ( > 5 mL/kg), blood loss requiring transfusion, or blood loss causing hypotension. Non-serious adverse events were not recorded. Patients were observed until catheter function was deemed to be restored or for a maximum of 4 hours after the first dose. Additionally, serious adverse events were elicited from patients at 48 hours (up to 96 hours) following completion of treatment.

No pediatric patients in Trial 3 experienced an intracranial hemorrhage, major hemorrhage, thrombosis, or an embolic event.

Three cases of sepsis occurred 2 to 44 hours after treatment with Cathflo Activase. All of these patients had evidence of infection prior to administration of Cathflo Activase. An additional patient developed fever and lethargy within one day of Cathflo Activase administration, which required outpatient intravenous antibiotics. In one subject, the lumen of the catheter, placed 2 years previously, ruptured with infusion of the study drug.

There were no gender-related differences observed in the rates of adverse reactions. Adverse reactions profiles were similar across all age groups.

Cathflo Activase Dosage and Administration

Cathflo® Activase® (Alteplase) is for instillation into the dysfunctional catheter at a concentration of 1 mg/mL.

• Patients weighing ≥30 kg:	2 mg in 2 mL
• Patients weighing <30 kg:	110% of the internal lumen volume of the catheter, not to exceed 2 mg in 2 mL

If catheter function is not restored at 120 minutes after 1 dose of Cathflo Activase, a second dose may be instilled (see Instructions for Administration). There is no efficacy or safety information on dosing in excess of 2 mg per dose for this indication. Studies have not been performed with administration of total doses greater than 4 mg (two 2‑mg doses).

Instructions for Administration

Preparation of Solution

Reconstitute Cathflo Activase to a final concentration of 1 mg/mL:

Aseptically withdraw 2.2 mL of Sterile Water for Injection, USP (diluent is not provided). Do not use Bacteriostatic Water for Injection.
Inject the 2.2 mL of Sterile Water for Injection, USP, into the Cathflo Activase vial, directing the diluent stream into the powder. Slight foaming is not unusual; let the vial stand undisturbed to allow large bubbles to dissipate.
Mix by gently swirling until the contents are completely dissolved. Complete dissolution should occur within 3 minutes. DO NOT SHAKE. The reconstituted preparation results in a colorless to pale yellow transparent solution containing 1 mg/mL Cathflo Activase at a pH of approximately 7.3.
Cathflo Activase contains no antibacterial preservatives and should be reconstituted immediately before use. The solution may be used for intracatheter instillation within 8 hours following reconstitution when stored at 2–30°C (36–86°F).

No other medication should be added to solutions containing Cathflo Activase.

Instillation of Solution into the Catheter

Inspect the product prior to administration for foreign matter and discoloration.
Withdraw 2 mL (2 mg) of solution from the reconstituted vial.
Instill the appropriate dose of Cathflo Activase (see DOSAGE AND ADMINISTRATION) into the occluded catheter.
After 30 minutes of dwell time, assess catheter function by attempting to aspirate blood. If the catheter is functional, go to Step 7. If the catheter is not functional, go to Step 5.
After 120 minutes of dwell time, assess catheter function by attempting to aspirate blood and catheter contents. If the catheter is functional, go to Step 7. If the catheter is not functional, go to Step 6.
If catheter function is not restored after one dose of Cathflo Activase, a second dose of equal amount may be instilled. Repeat the procedure beginning with Step 1 under Preparation of Solution.
If catheter function has been restored, aspirate 4–5 mL of blood in patients ≥10 kg or 3 mL in patients <10 kg to remove Cathflo Activase and residual clot, and gently irrigate the catheter with 0.9% Sodium Chloride Injection, USP.

Any unused solution should be discarded.

Stability and Storage

Store lyophilized Cathflo Activase at refrigerated temperature (2–8°C/36–46°F). Do not use beyond the expiration date on the vial. Protect the lyophilized material during extended storage from excessive exposure to light.

How is Cathflo Activase supplied

Cathflo Activase (Alteplase) for injection is supplied as a sterile, lyophilized powder in 2 mg vials.

Cathflo®Activase® is available in a carton that contains one 2 mg vial of Cathflo® Activase® (Alteplase): NDC 50242‑041‑64 or a carton that contains ten 2 mg vials of Cathflo® Activase® (Alteplase): NDC 50242-041-10.

References

Collen D, Lijnen HR. Fibrinolysis and the control of hemostasis. In: Stamatoyannopoulos G, Nienhui AW, Majerus PW, Varmus H, editors. The molecular basis of blood diseases, 2nd edition. Philadelphia: Saunders, 1994:662–88.
Tanswell P, Tebbe U, Neuhaus K-L, Glasle-Schwarz L, Wojick J, Seifried E. Pharmacokinetics and fibrin specificity of alteplase during accelerated infusions in acute myocardial infarction. J Am Coll Cardiol 1992;19:1071–5.
Califf RM, Topol EJ, George BS, Boswick JM, Abbottsmith C, Sigmon KN, et al., and the Thrombolysis and Angioplasty in Myocardial Infarction Study Group. Hemorrhagic complications associated with the use of intravenous tissue plasminogen activator in treatment of acute myocardial infarction. Am J Med 1988;85:353–9.
Bovill EG, Terrin ML, Stump DC, Berke AD, Frederick M, Collen D, et al. Hemorrhagic events during therapy with recombinant tissue-type plasminogen activator, heparin, and aspirin for acute myocardial infarction: results of the thrombolysis in myocardial infarction (TIMI), phase II trial. Ann Int Med 1991;115:256–65.

Cathflo® Activase® (Alteplase)
Manufactured by: Genentech, Inc. A Member of the Roche Group 1 DNA Way South San Francisco, CA 94080-4990 US License No. 1048	FDA Approval Date January 2005 Revised: 02/2019 Cathflo® Activase® is a trademark of Genentech, Inc. ©2019 Genentech, Inc.

Representative sample of labeling (see the HOW SUPPLIED section for complete listing):

PRINCIPAL DISPLAY PANEL - 2 mg Vial Carton

NDC 50242-041-64

US License No.: 1048

cathflo®
activase®
(ALTEPLASE) 2 mg

For Use in Central Venous Access Devices

Rx only
KEEP REFRIGERATED

10165659

Genentech

Principal Display Panel - 2 mg Vial Carton

CATHFLO ACTIVASE
alteplase injection, powder, lyophilized, for solution

Product Information
Product Type	HUMAN PRESCRIPTION DRUG	Item Code (Source)	NDC:50242-041
Route of Administration	INTRAVENOUS

Ingredient Name	Basis of Strength	Strength
Active Ingredient/Active Moiety
ALTEPLASE (UNII: 1RXS4UE564) (ALTEPLASE - UNII:1RXS4UE564)	ALTEPLASE	2.2 mg in 2 mL

Ingredient Name	Strength
Inactive Ingredients
ARGININE (UNII: 94ZLA3W45F)	77 mg in 2 mL
POLYSORBATE 80 (UNII: 6OZP39ZG8H)	0.2 mg in 2 mL
PHOSPHORIC ACID (UNII: E4GA8884NN)

#	Item Code	Package Description	Marketing Start Date
Packaging
1	NDC:50242-041-64	1 in 1 CARTON	09/04/2001
1		2 mL in 1 VIAL; Type 0: Not a Combination Product
2	NDC:50242-041-10	10 in 1 CARTON	10/14/2019
2		2 mL in 1 VIAL; Type 0: Not a Combination Product

Marketing Category	Application Number or Monograph Citation	Marketing Start Date	Marketing End Date
Marketing Information
BLA	BLA103172	09/04/2001

Labeler - Genentech, Inc. (080129000)

Registrant - Genentech, Inc. (080129000)

Name	Address	ID/FEI	Business Operations
Establishment
Genentech, Inc.		080129000	ANALYSIS(50242-041) , MANUFACTURE(50242-041) , API MANUFACTURE(50242-041) , PACK(50242-041) , LABEL(50242-041)

Name	Address	ID/FEI	Business Operations
Establishment
Genentech, Inc.		004074162	ANALYSIS(50242-041) , API MANUFACTURE(50242-041)

Name	Address	ID/FEI	Business Operations
Establishment
Genentech, Inc.		833220176	MANUFACTURE(50242-041) , PACK(50242-041) , LABEL(50242-041) , ANALYSIS(50242-041)

Name	Address	ID/FEI	Business Operations
Establishment
Roche Singapore Technical Operations Pte. Ltd.		937189173	ANALYSIS(50242-041)

Name	Address	ID/FEI	Business Operations
Establishment
Roche Diagnostics GmbH		323105205	ANALYSIS(50242-041)

Name	Address	ID/FEI	Business Operations
Establishment
Genentech, Inc		146373191	ANALYSIS(50242-041)

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TheMediTary.Com

Cathflo Activase Prescribing Information

General

Bleeding

Infections

Hypersensitivity

Re-Administration

Drug Interactions

Drug/Laboratory Test Interactions

Carcinogenesis, Mutagenesis, Impairment of Fertility

Pregnancy

Nursing Mothers

Pediatric Use

Geriatric Use

Trials 1 and 2

Trial 3

Instructions for Administration

Preparation of Solution

Instillation of Solution into the Catheter

Stability and Storage

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Cathflo Activase Description

Cathflo Activase - Clinical Pharmacology

Related/similar drugs

Clinical Studies

Indications and Usage for Cathflo Activase

Contraindications

Warnings

Precautions

General

Bleeding

Infections

Hypersensitivity

Re-Administration

Drug Interactions

Drug/Laboratory Test Interactions

Carcinogenesis, Mutagenesis, Impairment of Fertility

Pregnancy

Nursing Mothers

Pediatric Use

Geriatric Use

Adverse Reactions/Side Effects

Trials 1 and 2

Trial 3

Cathflo Activase Dosage and Administration

Instructions for Administration

Preparation of Solution

Instillation of Solution into the Catheter

Stability and Storage

How is Cathflo Activase supplied

References

PRINCIPAL DISPLAY PANEL - 2 mg Vial Carton

Latest News

IBD: Does a Mediterranean diet help with symptom relief?

Related Drugs

Categories

About US

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