Tremelimumab
Brand names: Imjudo
Drug class:
Antineoplastic Agents
Usage of Tremelimumab
Hepatocellular Carcinoma
Used in combination with durvalumab for the treatment of adults with unresectable hepatocellular carcinoma (uHCC). Designated an orphan drug by FDA for treatment of this cancer in combination with durvalumab.
Current US guidelines do not address use of tremelimumab for treatment of HCC.
Non-small Cell Lung Cancer
Used in combination with durvalumab and platinum-based chemotherapy for the treatment of adults with metastatic non-small cell lung cancer (NSCLC) with no sensitizing epidermal growth factor receptor (EGFR) mutations or anaplastic lymphoma kinase (ALK) genomic tumor aberrations.
Most recent update of the ASCO living guideline states that clinicians may offer durvalumab and tremelimumab plus platinum-based chemotherapy to patients with non-squamous or squamous cell carcinoma, a PD-L1 tumor proportion score of 0%-49%, and performance status of 0-1.
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How to use Tremelimumab
General
Pretreatment Screening
Patient Monitoring
Dispensing and Administration Precautions
Administration
IV Administration
Available as an injection concentrate in single-dose vials containing 25 mg/1.25 mL (20 mg/mL) or 300 mg/15 mL (20 mg/mL). The drug is administered as an IV infusion after dilution.
DilutionPrior to dilution, visually inspect the injection for particulate matter and discoloration; discard vial if the solution is cloudy, discolored, or has visible particles. Do not shake vial.
Withdraw required volume from vial(s) and transfer into an IV bag containing 0.9% sodium chloride or 5% dextrose. Mix diluted solution by gentle inversion; do not shake. The maximum final concentration of the diluted solution should not exceed 10 mg/mL. Discard partially used or empty vials of tremelimumab.
Administer diluted solution immediately once prepared; tremelimumab does not contain a preservative. Do not shake or freeze diluted solution.
Rate of AdministrationAdminister tremelimumab IV over 60 minutes through IV line containing a sterile, low-protein binding 0.2- or 0.22-micron filter.
Use separate infusion bags and filters for each drug. Do not coadminister other drugs through same infusion line.
When tremelimumab is used in combination with durvalumab, infuse tremelimumab over 60 minutes, observe patient for 60 minutes following completion of the infusion, then infuse durvalumab as a separate infusion over 60 minutes on same day of dosing.
When tremelimumab is used in combination with durvalumab plus platinum-based chemotherapy/pemetrexed, infuse tremelimumab first, followed by durvalumab, and then platinum-based chemotherapy/pemetrexed on day of dosing. During cycle 1, first infuse tremelimumab over 60 minutes; then, 1–2 hours after completion of tremelimumab infusion, infuse durvalumab over 60 minutes; and 1–2 hours after completion of durvalumab infusion, infuse platinum-based chemotherapy. For subsequent cycles, if no infusion reactions occur during cycle 1, durvalumab may be infused immediately after tremelimumab, and time between end of durvalumab infusion and start of chemotherapy can be reduced to 30 minutes.
Dosage
Adults
Hepatocellular Carcinoma IVRecommended dosage based on body weight.
Weight <30 kg: Administer tremelimumab 4 mg/kg by IV infusion as a single dose followed by durvalumab 20 mg/kg by IV infusion on day 1 of cycle 1, followed by durvalumab 20 mg/kg by IV infusion as a single agent every 4 weeks until disease progression or unacceptable toxicity.
Weight ≥30 kg: Administer tremelimumab 300 mg by IV infusion as a single dose followed by durvalumab 1,500 mg by IV infusion on day 1 of cycle 1, followed by durvalumab 1,500 mg by IV infusion as a single agent every 4 weeks until disease progression or unacceptable toxicity.
Non-small Cell Lung Cancer IVRecommended dosage of tremelimumab is based on tumor histology and body weight. Weigh patients prior to each infusion. Recommended regimens and dosage schedule are provided in Tables 1 and 2.
Consult the full prescribing information for dosing information.
Table 1. Recommended Regimen and Dosage for Treatment of Metastatic NSCLC1Tumor Histology
Patient Weight
Tremelimumab Dosage
Durvalumab Dosage
Platinum-Based Chemotherapy Regimen
Non-squamous
<30 kg
1 mg/kg
20 mg/kg
Carboplatin and albumin-bound paclitaxel OR Carboplatin or cisplatin and pemetrexed
≥30 kg
75 mg
1500 mg
Squamous
<30 kg
1 mg/kg
20 mg/kg
Carboplatin and albumin-bound paclitaxel OR Carboplatin or cisplatin and gemcitabine
≥30 kg
75 mg
1500 mg
Dosing interval change from every 3 weeks to every 4 weeks starting at cycle 5.
IV infusion over 60 minutes.
If patients receive <4 cycles of platinum-based chemotherapy, administer the remaining cycles of tremelimumab (up to a total of 5) after the platinum-based chemotherapy phase, in combination with durvalumab, every 4 weeks.
Continue durvalumab until disease progression or intolerable toxicity.
In patients with non-squamous disease who received treatment with pemetrexed and carboplatin/cisplatin, optional pemetrexed therapy may be administered from week 12 until disease progression or intolerable toxicity.
Table 2. Recommended Dosage Schedule for Treatment of Metastatic NSCLC1Weeka
0
3
6
9
12
16
20
24
Cycle
1
2
3
4
5
6
7
8
Tremelimumab ,
X
X
X
X
X
Durvalumab ,
X
X
X
X
X
X
X
X
Chemotherapy
X
X
X
X
X
X
X
X
eIn patients with non-squamous disease who received treatment with pemetrexed and carboplatin/cisplatin, optional pemetrexed therapy may be administered from week 12 until disease progression or intolerable toxicity.
Therapy Modification for Toxicity
Immune-mediated Adverse ReactionsDosage reductions not recommended. In general, withhold treatment regimen for severe (grade 3) immune-mediated adverse reactions and administer systemic corticosteroid therapy.
Systemic corticosteroid therapy consists of prednisone 1–2 mg/kg per day or equivalent until improvement to grade 1 or less. Upon improvement to grade 1 or less, initiate corticosteroid taper and continue to taper over ≥1 month. Consider administration of other systemic immunosuppressants if immune-mediated adverse reaction is not controlled with corticosteroid therapy.
Permanently discontinue treatment regimen for life-threatening (grade 4) immune-mediated adverse reactions, recurrent severe (grade 3) immune-mediated reactions that require systemic immunosuppressive treatment, or an inability to reduce corticosteroid dose to ≤10 mg of prednisone per day (or equivalent) within 12 weeks of initiating corticosteroids.
Table 3 summarizes recommended treatment modifications for specific adverse reactions.
Resume in patients with complete or partial resolution (grade 0 to 1) after corticosteroid taper. Permanently discontinue if no complete or partial resolution within 12 weeks of initiating corticosteroids or an inability to reduce corticosteroid dose to ≤10 mg of prednisone per day (or equivalent) within 12 weeks of initiating corticosteroids.
Endocrinopathies include type 1 diabetes, hypophysitis, hypothyroidism, hyperthyroidism, and adrenal insufficiency.
Table 3. Recommended Treatment Modifications for Adverse Reactions1Adverse Reaction
Severity
Treatment Modification
Immune-mediated Adverse Reactions
Colitis
Grade 2
Withhold
Grade 3 or 4
Permanently discontinue
Endocrinopathies
Grade 3 or 4
Withhold until clinically stable or permanently discontinue depending on severity
Exfoliative dermatologic conditions
Suspected Stevens-Johnson syndrome (SJS), toxic epidermal necrolysis (TEN), or Drug Rash with Eosinophilia and Systemic Symptoms (DRESS)
Withhold
Confirmed SJS, TEN, or DRESS
Permanently discontinue
Hepatitis with no tumor involvement of the liver
ALT or AST increases to >3 and up to 8 times ULN, or total bilirubin increases to >1.5 and up to 3 times ULN
Withhold
ALT or AST increases to >8 times ULN or total bilirubin increases to >3 times ULN
Permanently discontinue
Hepatitis with tumor involvement of the liver
AST and ALT less than or equal to ULN at baseline
Withhold or permanently discontinue durvalumab based on recommendations for hepatitis with no liver involvement
AST or ALT >1 and up to 3 times ULN at baseline and increases to >5 and up to 10 times ULN, or AST or ALT >3 and up to 5 times ULN at baseline and increases to >8 and up to 10 times ULN
Withhold
ALT or AST increases to >10 times ULN or total bilirubin increases to >3 times ULN
Permanently discontinue
Intestinal perforation
Any grade
Permanently discontinue
Myocarditis
Grade 2, 3, or 4
Permanently discontinue
Nephritis with renal dysfunction
Grade 2 or 3 increased blood creatinine
Withhold
Grade 4 increased blood creatinine
Permanently discontinue
Neurological toxicities
Grade 2
Withhold
Grade 3 or 4
Permanently discontinue
Pneumonitis
Grade 2
Withhold
Grade 3 or 4
Permanently discontinue
Other Adverse Reactions
Infusion-related reactions
Grade 1 or 2
Interrupt or slow the infusion rate
Grade 3 or 4
Permanently discontinue
Special Populations
Hepatic Impairment
No specific dosage recommendations at this time.
Renal Impairment
No specific dosage recommendations at this time.
Geriatric Use
No specific dosage recommendations at this time.
Warnings
Contraindications
Warnings/Precautions
Severe and Fatal Immune-mediated Adverse Reactions
Tremelimumab has potential for induction of immune-mediated adverse reactions.
Severe or fatal immune-mediated adverse reactions may occur in any organ system or tissue. May occur at any time after starting tremelimumab in combination with durvalumab; such reactions usually manifest during treatment but may also manifest after treatment discontinuation.
Early identification and management of immune-mediated adverse reactions are essential to ensure treatment safety. Monitor for signs and symptoms that may be clinical manifestations of underlying immune-mediated adverse reactions. Assess clinical chemistries, including liver enzymes, creatinine, adrenocorticotropic hormone level, and thyroid function, at baseline and before each dose. Medically manage immune-mediated adverse reactions promptly, and refer for specialty consultation as appropriate
Withhold or permanently discontinue tremelimumab and durvalumab depending on severity; refer to Table 3 for recommended treatment modifications for specific immune-mediated adverse reactions. In general, if treatment interruption or discontinuation is required, administer systemic corticosteroid therapy (prednisone 1 to 2 mg/kg per day or equivalent) until improvement to grade 1 or less. Upon improvement to grade 1 or less, initiate corticosteroid taper and continue to taper over ≥1 month. Consider administration of other systemic immunosuppressants if immune-mediated adverse reactions are not controlled with corticosteroid therapy.
Immune-mediated adverse reactions listed below may not be inclusive of all possible immune-mediated reactions.
Immune-mediated Pneumonitis: Immune-mediated pneumonitis (including grade 3 and fatal events) has been reported in patients receiving tremelimumab in combination with durvalumab and/or platinum-based chemotherapy. All patients received systemic corticosteroids to treat immune-mediated pneumonitis; some required other immunosuppressants. While pneumonitis resolved in most cases, it led to treatment discontinuation in some patients.
Immune-mediated Colitis: Tremelimumab in combination with durvalumab may cause immune-mediated colitis (including grade 3 events) that is frequently associated with diarrhea. In clinical studies, all patients received systemic corticosteroids to manage colitis and most required high-dose corticosteroids (at least 40 mg of prednisone or equivalent daily); some patients also received other immunosuppressants. While events resolved in most patients, they resulted in permanent discontinuation in some patients.
Cytomegalovirus infection/reactivation reported in patients with corticosteroid-refractory immune-mediated colitis. In cases of corticosteroid-refractory colitis, consider repeating infectious workup to exclude alternative etiologies. Intestinal perforation observed in other studies of tremelimumab in combination with durvalumab.
Immune-mediated Hepatitis:Immune-mediated hepatitis (including grade 3 and 4 and fatal events) has occurred with tremelimumab in combination with durvalumab. In clinical studies, systemic corticosteroids were used to manage immune-mediated hepatitis in all patients and all patients required high-dose corticosteroid therapy (at least 40 mg of prednisone or equivalent daily); some patients required other immunosuppressants. Hepatitis resolved in under half of patients but led to permanent discontinuation in some patients.
Immune-mediated Adrenal Insufficiency:Primary or secondary adrenal insufficiency, including grade 3 events, reported with tremelimumab in combination with durvalumab. For grade 2 or higher adrenal insufficiency, initiate symptomatic treatment, including hormone replacement as clinically indicated. In clinical studies, systemic corticosteroids were required in all patients. Events resolved in some patients.
Immune-mediated Hypophysitis: Tremelimumab in combination with durvalumab may cause immune-mediated hypophysitis (including grade 3 events). Hypophysitis may present with acute symptoms associated with mass effect (e.g., headache, photophobia, or visual field cuts). Hypophysitis may lead to hypopituitarism. Initiate symptomatic treatment including hormone replacement as clinically indicated. In clinical studies, most patients with immune-mediated hypophysitis and hypopituitarism required systemic corticosteroids and some patients also required endocrine therapy. These events resolved in some patients.
Thyroid Disorders:Tremelimumab in combination with durvalumab may cause immune-mediated thyroid disorders, including thyroiditis (which can be present with or without endocrinopathy), hyperthyroidism (including grade 3 events), and hypothyroidism (which may follow hyperthyroidism). Initiate hormone replacement therapy for hypothyroidism or institute medical management of hyperthyroidism as clinically indicated. In clinical trials, systemic corticosteroids were required in some patients with hyperthyroidism, hypothyroidism, or thyroiditis; all or most patients required other therapy (e.g., hormone replacement therapy, thiamazole, carbimazole, propylthiouracil, perchlorate, calcium-channel blockers, beta-blockers). Hyperthyroidism resolved in most patients while hypothyroidism and thyroiditis resolved in some patients.
Type 1 Diabetes Mellitus:Type 1 diabetes mellitus can present with diabetic ketoacidosis. Monitor patients for hyperglycemia and other signs and symptoms of diabetes. Initiate treatment with insulin as clinically indicated.
Immune-mediated Nephritis with Renal Dysfunction:Immune-mediated nephritis with renal dysfunction (including grade 3 events) reported with tremelimumab in combination with durvalumab. Systemic corticosteroids were required in all patients. In some patients, events resolved; immune-mediated nephritis resulted in permanent discontinuation in some patients.
Immune-mediated Dermatologic Reactions: Tremelimumab in combination with durvalumab may cause immune-mediated rash or dermatitis, including grade 3 and 4 events. Exfoliative dermatitis, including Stevens-Johnson Syndrome (SJS), drug rash with eosinophilia and systemic symptoms (DRESS), and toxic epidermal necrolysis (TEN), has occurred with immune checkpoint inhibitors. Topical emollients and/or topical corticosteroids may be adequate to treat mild to moderate non-exfoliative rashes. In clinical studies, all patients received systemic corticosteroids to manage immune-mediated rash or dermatitis; other immunosuppressants were required rarely. Dermatologic events resolved in most patients, although permanent discontinuation was required in some cases.
Immune-mediated Pancreatitis: Tremelimumab in combination with durvalumab may cause immune-mediated pancreatitis, including grade 3 or 4 events. In clinical studies, all patients required management with systemic corticosteroids (high-dose corticosteroid therapy was necessary in most patients); pancreatitis resolved in most patients.
Other Immune-mediated Adverse Reactions:The following clinically significant, immune-mediated adverse reactions occurred at an incidence of <1% each in patients who received tremelimumab in combination with durvalumab or were reported with the use of other immune-checkpoint inhibitors.
Cardiac/vascular: Myocarditis, pericarditis, vasculitis.
Nervous system: Meningitis, encephalitis, myelitis and demyelination, myasthenic syndrome/myasthenia gravis (including exacerbation), Guillain-Barré syndrome, nerve paresis, autoimmune neuropathy.
Ocular: Uveitis, iritis, and other ocular inflammatory toxicities observed; some cases can be associated with retinal detachment. Various degrees of visual impairment, including blindness, can occur. If uveitis occurs in combination with other immune-mediated adverse reactions, consider Vogt-Koyanagi-Harada-like syndrome; this condition may require systemic corticosteroid therapy to reduce the risk of permanent vision loss.
GI: Gastritis, duodenitis.
Musculoskeletal and connective tissue disorders: Myositis/polymyositis, rhabdomyolysis and associated sequelae including renal failure, arthritis, polymyalgia rheumatica.
Endocrine: Hypoparathyroidism.
Other (hematologic/immune): Hemolytic anemia, aplastic anemia, hemophagocytic lymphohistiocytosis, systemic inflammatory response syndrome, histiocytic necrotizing lymphadenitis (Kikuchi lymphadenitis), sarcoidosis, immune thrombocytopenia.
Infusion-related Reactions
Severe or life-threatening infusion-related reactions reported with tremelimumab in combination with durvalumab.
Monitor for signs and symptoms of infusion-related reactions. Interrupt, slow the rate of, or permanently discontinue tremelimumab and durvalumab based on severity; refer to Table 3 for specific recommendations. For Grade 1 or 2 infusion-related reactions, consider pre-medications with subsequent doses.
Embryo-fetal Toxicity
Based on findings from animal studies and the mechanism of action of tremelimumab, the drug can cause fetal harm when administered to a pregnant woman. Animal studies have found that CTLA-4 blockade is associated with higher incidence of pregnancy loss.
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 with tremelimumab and for 3 months after the last dose of the drug.
Immunogenicity
There is a potential for immunogenicity with tremelimumab therapy. In the HIMALAYA and POSEIDON studies, anti-tremelimumab antibodies detected in 11 and 14% of patients, respectively. These anti-tremelimumab antibodies did not have a clinically significant effect on pharmacokinetics or safety of tremelimumab; however, the effect of anti-drug antibodies and neutralizing antibodies on the drug's efficacy is unknown.
Specific Populations
PregnancyNo available data on the use of tremelimumab in pregnant women. However, based on findings from animal studies and its mechanism of action, tremelimumab can cause fetal harm when administered to a pregnant woman. In a murine model of pregnancy, CTLA-4 blockade was associated with an increased risk of immune-mediated rejection of the developing fetus and fetal death.
Human IgG2 is known to cross the placental barrier; therefore, tremelimumab may be transmitted from mother to developing fetus. Advise pregnant women and females of reproductive potential of the potential risk tothe fetus.
LactationUnknown whether tremelimumab is distributed into human milk; effects of the drug on breast-fed infants or on milk production also are unknown. Maternal IgG is known to be present in human milk. Effects of local GI exposure and limited systemic exposure to tremelimumab in the breast-fed child are unknown. Because of the potential for serious adverse reactions in the breast-fed child, advise women not to breastfeed during treatment with tremelimumab and for 3 months after the last dose.
Females and Males of Reproductive PotentialTremelimumab can cause fetal harm when administered to a pregnant woman. Perform pregnancy testing in females of reproductive potential before initiating tremelimumab.
Advise females of reproductive potential to use effective contraception during treatment with tremelimumab and for 3 months after the last dose.
Pediatric UseSafety and efficacy of tremelimumab not established in pediatric patients.
Geriatric UseIn clinical studies of patients with unresectable hepatocellular carcinoma or metastatic non-small cell lung cancer treated with tremelimumab in combination with durvalumab, no overall differences in safety or efficacy of tremelimumab observed in patients ≥65 years of age compared to younger adults.
Hepatic ImpairmentNo clinically significant differences in pharmacokinetics observed in patients with mild to moderate hepatic impairment (bilirubin <3 times ULN and any AST). Effect of severe hepatic impairment (bilirubin >3 times ULN and any AST) on pharmacokinetics is unknown.
Renal ImpairmentNo clinically significant differences in pharmacokinetics observed in patients with mild to moderate renal impairment (Clcr 30–89 mL/min). Effect of severe renal impairment (Clcr 15–29 mL/min) on pharmacokinetics is unknown.
Common Adverse Effects
Most common adverse effects (≥20%) in patients with unresectable hepatocellular carcinoma: Rash, diarrhea, fatigue, pruritus, musculoskeletal pain, abdominal pain. Most common laboratory abnormalities (≥40%) of patients with unresectable hepatocellular carcinoma: Increased AST, increased ALT, decreased hemoglobin, decreased sodium, increased bilirubin, increased alkaline phosphatase, decreased lymphocytes.
Most common adverse effects (≥20%) in patients with metastatic NSCLC: Nausea, fatigue, musculoskeletal pain, decreased appetite, rash, diarrhea.
What other drugs will affect Tremelimumab
The manufacturer does not provide any information on drug interactions with tremelimumab in the prescribing information. Consult the prescribing information for drug interactions of the agents administered in combination with tremelimumab.
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