ACTEMRA Dosing and Administration Calculator


 

ACTEMRA SJIA Dosing Calculator

For the treatment of active systemic juvenile idiopathic arthritis (SJIA) in patients 2 years of age and older.

Select Patient Indication:

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Recommended SJIA dosage every 2 weeks

Patients <30 kg - 12 mg/kg

Patients ≥30 kg - 8 mg/kg

Recommended PJIA dosage every 4 weeks

Patients <30 kg - 10 mg/kg

Patients ≥30 kg - 8 mg/kg

80 mg 4 mL

200 mg 10 mL

400 mg 20 mL

DISCLAIMER:
By using this resource, you agree to the following: This Dosing Calculator is being provided "AS IS" and is intended for use only by qualified healthcare providers. All calculations should be confirmed before use. Genentech makes no claims as to the accuracy of the information contained herein. The information being provided is not a substitute for clinical judgment. Neither Genentech, nor any other party involved in the preparation or publication of this site, shall be liable to you or others for any decisions made or actions taken by you or others in reliance on this information.

  • ACTEMRA should not be infused concomitantly in the same intravenous line with other drugs. No physical or biochemical compatibility studies have been conducted to evaluate the co-administration of ACTEMRA with other drugs
  • The infusion should be administered over 60 minutes, and must be administered with an infusion set
  • Do not administer as an intravenous push or bolus
  • Dosing Calculator should not replace professional judgment or clinical experience
  • For additional dosing information please refer to the Dosing Guide
  • Doses exceeding 800 mg per infusion are not recommended
  • Dosing Calculator is not a substitute for medical examination

Please see Dosing Guide for more information

CONTRAINDICATION

ACTEMRA is contraindicated in patients with known hypersensitivity to ACTEMRA.

WARNINGS AND PRECAUTIONS

Laboratory Parameters

Rheumatoid Arthritis

Neutropenia
Treatment with ACTEMRA was associated with a higher incidence of neutropenia. Infections have been uncommonly reported in association with treatment-related neutropenia in long-term extension studies and postmarketing clinical experience.

  • It is not recommended to initiate ACTEMRA treatment in patients with a low neutrophil count, i.e., absolute neutrophil count (ANC) less than 2000 per mm3. In patients who develop an absolute neutrophil count less than 500 per mm3 treatment is not recommended
  • Monitor neutrophils 4 to 8 weeks after start of therapy and every 3 months thereafter

Thrombocytopenia
Treatment with ACTEMRA was associated with a reduction in platelet counts. Treatment-related reduction in platelets was not associated with serious bleeding events in clinical trials.

  • It is not recommended to initiate ACTEMRA treatment in patients with a platelet count below 100,000 per mm3. In patients who develop a platelet count less than 50,000 per mm3 treatment is not recommended
  • Monitor platelets 4 to 8 weeks after start of therapy and every 3 months thereafter

Elevated Liver Enzymes
Treatment with ACTEMRA was associated with a higher incidence of transaminase elevations. These elevations did not result in apparent permanent or clinically evident hepatic injury in clinical trials. Increased frequency and magnitude of these elevations was observed when potentially hepatotoxic drugs (e.g., MTX) were used in combination with ACTEMRA. In one case, a patient who had received ACTEMRA 8 mg per kg monotherapy without elevations in transaminases experienced elevation in AST to above 10x ULN and elevation in ALT to above 16x ULN when MTX was initiated in combination with ACTEMRA. Transaminases normalized when both treatments were held, but elevations recurred when MTX and ACTEMRA were restarted at lower doses. Elevations resolved when MTX and ACTEMRA were discontinued.

  • It is not recommended to initiate ACTEMRA treatment in patients with elevated transaminases ALT or AST greater than 1.5x ULN. In patients who develop elevated ALT or AST greater than 5x ULN treatment is not recommended
  • Monitor ALT and AST levels 4 to 8 weeks after start of therapy and every 3 months thereafter. When clinically indicated, other liver function tests such as bilirubin should be considered

Lipid Abnormalities
Treatment with ACTEMRA was associated with increases in lipid parameters such as total cholesterol, triglycerides, LDL cholesterol, and/or HDL cholesterol.

  • Assess lipid parameters approximately 4 to 8 weeks following initiation of ACTEMRA therapy, then at approximately 24-week intervals
  • Manage patients according to clinical guidelines [e.g., National Cholesterol Educational Program (NCEP)] for the management of hyperlipidemia

Polyarticular and Systemic Juvenile Idiopathic Arthritis
A similar pattern of liver enzyme elevation, low neutrophil count, low platelet count and lipid elevations is noted with ACTEMRA treatment in the PJIA and SJIA populations. Monitor neutrophils, platelets, ALT and AST at the time of the second infusion and thereafter every 4 to 8 weeks for PJIA and every 2 to 4 weeks for SJIA. Monitor lipids as above for RA.

For your patients with SJIA

ACTEMRA may be used alone or in combination with methotrexate. The recommended dose of ACTEMRA for SJIA patients given once every 2 weeks as a 60-minute single intravenous drip infusion is:

Recommended SJIA dosing every 2 weeks

Patients less than 30 kg weight
12 mg per kg

Patients at or above 30 kg weight
8 mg per kg

ACTEMRA SJIA dosing-related safety information

  • Do not change a dose based solely on a single visit body weight measurement, as weight may fluctuate
  • Dose interruptions of ACTEMRA are recommended for liver enzyme abnormalities, low neutrophil counts, and low platelet counts in patients with SJIA at levels similar to what is outlined above for patients with RA
  • Dose reduction of ACTEMRA has not been studied in the SJIA population
  • If appropriate, dose modify or stop concomitant methotrexate and/or other medications and hold ACTEMRA dosing until the clinical situation has been evaluated
  • In SJIA the decision to discontinue ACTEMRA for a laboratory abnormality should be based on medical assessment of the individual patient
  • Subcutaneous administration is not approved for SJIA

INDICATIONS

ACTEMRA is indicated for the treatment of adult patients with moderately to severely active rheumatoid arthritis (RA) who have had an inadequate response to one or more Disease-Modifying Anti-Rheumatic Drugs (DMARDs).

ACTEMRA is indicated for the treatment of giant cell arteritis (GCA) in adult patients.

ACTEMRA is indicated for the treatment of active polyarticular juvenile idiopathic arthritis in patients 2 years of age and older.

ACTEMRA is indicated for the treatment of active systemic juvenile idiopathic arthritis in patients 2 years of age and older.

IMPORTANT SAFETY INFORMATION

BOXED WARNING

RISK OF SERIOUS INFECTIONS:

Patients treated with ACTEMRA are at increased risk for developing serious infections that may lead to hospitalization or death, including tuberculosis (TB), bacterial, invasive fungal, viral, or other opportunistic infections. If a serious infection develops, interrupt ACTEMRA until the infection is controlled.

Reported infections include:

  • Active tuberculosis, which may present with pulmonary or extrapulmonary disease. Patients should be tested for latent tuberculosis before ACTEMRA use and during therapy. Treatment for latent infection should be initiated prior to ACTEMRA use.
  • Invasive fungal infections, including candidiasis, aspergillosis, and pneumocystis. Patients with invasive fungal infections may present with disseminated, rather than localized, disease.
  • Bacterial, viral and other infections due to opportunistic pathogens.

The risks and benefits of treatment with ACTEMRA should be carefully considered prior to initiating therapy in patients with chronic or recurrent infection.

Patients should be closely monitored for the development of signs and symptoms of infection during and after treatment with ACTEMRA, including the possible development of tuberculosis in patients who tested negative for latent tuberculosis infection prior to initiating therapy.

CONTRAINDICATION

ACTEMRA is contraindicated in patients with known hypersensitivity to ACTEMRA.

WARNINGS AND PRECAUTIONS

Gastrointestinal Perforations

Events of gastrointestinal (GI) perforation have been reported in clinical trials, primarily as complications of diverticulitis in RA patients. Use ACTEMRA with caution in patients who may be at increased risk for GI perforation. Promptly evaluate patients presenting with new-onset abdominal symptoms for early identification of GI perforation.

Laboratory Parameters

Laboratory monitoring is recommended due to potential consequences of treatment-related laboratory abnormalities in neutrophils, platelets, lipids, and liver function tests. Dosage modifications may be required.

Neutropenia: Treatment with ACTEMRA was associated with a higher incidence of neutropenia. It is not recommended to initiate ACTEMRA treatment in patients with a low neutrophil count i.e., absolute neutrophil count (ANC) less than 2000 per mm3. In patients who develop an ANC less than 500 per mm3 treatment is not recommended.

Thrombocytopenia: Treatment with ACTEMRA was associated with a reduction in platelet counts. It is not recommended to initiate ACTEMRA in patients with a platelet count below 100,000 per mm3. In patients who develop a platelet count less than 50,000 per mm3, treatment is not recommended.

Elevated Liver Enzymes: Treatment with ACTEMRA was associated with a higher incidence of transaminase elevations. These elevations did not result in apparent permanent or clinically evident hepatic injury in clinical trials. Increased frequency and magnitude of these elevations was observed when potentially hepatotoxic drugs (e.g., methotrexate) were used in combination with ACTEMRA.
– It is not recommended to initiate ACTEMRA treatment in patients with elevated transaminases ALT or AST >1.5x ULN. In patients who develop elevated ALT or AST >5x ULN, treatment is not recommended.

Lipid Abnormalities: Treatment with ACTEMRA was associated with increases in lipid parameters such as total cholesterol, triglycerides, LDL cholesterols, and/or HDL cholesterol.

Immunosuppression

The impact of treatment with ACTEMRA on the development of malignancies is not known, but malignancies were observed in clinical studies with ACTEMRA. ACTEMRA is an immunosuppressant, and treatment with immunosuppressants may result in an increased risk of malignancies.

Hypersensitivity Reactions

Hypersensitivity reactions, including anaphylaxis, have been reported in association with ACTEMRA and anaphylactic events with a fatal outcome have been reported with intravenous infusion of ACTEMRA. ACTEMRA for intravenous use should only be infused by a healthcare professional with appropriate medical support to manage anaphylaxis. For ACTEMRA subcutaneous injection, advise patients to seek immediate medical attention if they experience any symptoms of a hypersensitivity reaction. If anaphylaxis or other hypersensitivity reaction occurs, stop administration of ACTEMRA immediately and discontinue ACTEMRA permanently. Do not administer ACTEMRA to patients with known hypersensitivity to ACTEMRA.

Anaphylaxis and other hypersensitivity reactions that required treatment discontinuation were reported in 0.1% (3 out of 2644) of patients in the 6-month controlled trials of intravenous ACTEMRA, 0.2% (8 out of 4009) of patients in the intravenous all-exposure RA population, 0.7% (8 out of 1068) in the subcutaneous 6-month controlled RA trials, and in 0.7% (10 out of 1465) of patients in the subcutaneous all-exposure population. In the SJIA controlled trial with intravenous ACTEMRA, 1 out of 112 patients (0.9%) experienced hypersensitivity reactions that required treatment discontinuation. In the PJIA controlled trial with intravenous ACTEMRA, 0 out of 188 patients (0%) in the ACTEMRA all-exposure population experienced hypersensitivity reactions that required treatment discontinuation.

Demyelinating Disorders

The impact of treatment with ACTEMRA on demyelinating disorders is not known, but multiple sclerosis and chronic inflammatory demyelinating polyneuropathy were reported rarely in clinical studies. Monitor patients for signs and symptoms of demyelinating disorders. Prescribers should exercise caution in considering the use of ACTEMRA in patients with preexisting or recent-onset demyelinating disorders.

Active Hepatic Disease and Hepatic Impairment

Treatment with ACTEMRA is not recommended in patients with active hepatic disease or hepatic impairment.

Vaccinations

Avoid use of live vaccines concurrently with ACTEMRA. No data are available on the secondary transmission of infection from persons receiving live vaccines to patients receiving ACTEMRA or on the effectiveness of vaccination in patients receiving ACTEMRA. Patients should be brought up to date on all recommended vaccinations prior to initiation of ACTEMRA therapy.

ADVERSE REACTIONS

RHEUMATOID ARTHRITIS (RA)

The most common serious adverse reactions were serious infections. The most common serious infections included pneumonia, urinary tract infection, cellulitis, herpes zoster, gastroenteritis, diverticulitis, sepsis and bacterial arthritis. In the ACTEMRA-IV monotherapy clinical study, the rate of serious infections was 3.6 per 100 patient-years in the ACTEMRA group and 1.5 per 100 patient-years in the methotrexate group. The rate of serious infections in the 4 mg/kg and 8 mg/kg ACTEMRA plus DMARD groups was 4.4 and 5.3 events per 100 patient-years, respectively, compared to 3.9 events per 100 patient-years in the placebo plus DMARD group.

In the 5 Phase III clinical trials, the most common adverse reactions (≥5% of patients treated with ACTEMRA-IV) through 6 months were:

  ACTEMRA-IV
8 mg/kg
Monotherapy (%)
Methotrexate (%) ACTEMRA-IV
4 mg/kg
+ DMARDs (%)
ACTEMRA-IV
8 mg/kg
+ DMARDs (%)
Placebo
+ DMARDs (%)
URTI 7 5 6 8 6
Nasopharyngitis 7 6 4 6 4
Headache 7 2 6 5 3
Hypertension 6 2 4 4 3
Increased ALT 6 4 3 3 1

The safety observed for ACTEMRA administered subcutaneously was consistent with the known safety profile of intravenous ACTEMRA, with the exception of injection-site reactions, which were more common with ACTEMRA-SC compared with placebo-SC injections (IV-arm).

In the 6-month control period, in SC-I, the frequency of injection-site reactions was 10.1% (64/631) and 2.4% (15/631) for the weekly ACTEMRA-SC and placebo-SC (IV-arm) group, respectively. In SC-II, the frequency of injection-site reactions was 7.1% (31/437) and 4.1% (9/218) for the every other week ACTEMRA-SC and placebo-SC groups, respectively. These injection-site reactions were mild to moderate in severity. The majority resolved without any treatment and none necessitated drug discontinuation.

GIANT CELL ARTERITIS (GCA)

The overall safety profile observed in the ACTEMRA treatment groups was generally consistent with the known safety profile of ACTEMRA. There was an overall higher incidence of infections in GCA patients relative to RA patients.

Infections

The rate of infections was 200.2 per 100 patient-years in the ACTEMRA SC weekly group and 160.2 per 100 patient-years in the ACTEMRA SC every other week group, as compared to 156.0 per 100 patient-years in the placebo + 26 week prednisone taper and 210.2 per 100 patient-years in the placebo + 52 week taper groups.

The rate of serious infections was 9.7 per 100 patient-years in the ACTEMRA SC weekly group and 4.4 per 100 patient-years in the ACTEMRA SC every other week group, as compared to 4.2 per 100 patient-years in the placebo + 26 week prednisone taper and 12.5 per 100 patient-years in the placebo + 52 week prednisone taper groups.

POLYARTICULAR JUVENILE IDIOPATHIC ARTHRITIS (PJIA)

The most common adverse events seen in ACTEMRA-treated patients in the all-exposure population included: upper respiratory tract infections, headache, nasopharyngitis, and diarrhea.

Infections

The rate of infections in the ACTEMRA all-exposure population was 163.7 per 100 patient-years. The most common events observed were nasopharyngitis and upper respiratory tract infections. The rate of serious infections was numerically higher in patients weighing less than 30 kg treated with 10 mg/kg ACTEMRA (12.2 per 100 patient-years) compared to patients weighing at or above 30 kg, treated with 8 mg/kg ACTEMRA (4.0 per 100 patient-years). The incidence of infections leading to dose interruptions was also numerically higher in patients weighing less than 30 kg treated with 10 mg/kg ACTEMRA (21%) compared to patients weighing at or above 30 kg, treated with 8 mg/kg ACTEMRA (8%).

Infusion Reactions

In PJIA patients, infusion-related reactions are defined as all events occurring during or within 24 hours of an infusion. In the ACTEMRA all-exposure population, 11 patients (6%) experienced an event during the infusion, and 38 patients (20.2%) experienced an event within 24 hours of an infusion. The most common events occurring during infusion were headache, nausea and hypotension, and occurring within 24 hours of infusion were dizziness and hypotension. 

SYSTEMIC JUVENILE IDIOPATHIC ARTHRITIS (SJIA)

The most common adverse events (at least 5%) seen in ACTEMRA-treated patients in the 12-week controlled portion of the study were: upper respiratory tract infections, headache, nasopharyngitis, and diarrhea.

Infections

In the 12-week controlled phase, the rate of all infections in the ACTEMRA group was 345 per 100 patient-years and 287 per 100 patient-years in the placebo group. In the open-label extension over an average duration of 73 weeks of treatment, the overall rate of infections was 304 per 100 patient-years.

In the 12-week controlled phase, the rate of serious infections in the ACTEMRA group was 11.5 per 100 patient-years. In the open-label extension over an average duration of 73 weeks of treatment, the overall rate of serious infections was 11.4 per 100 patient-years. The most commonly reported serious infections included pneumonia, gastroenteritis, varicella, and otitis media.

Macrophage Activation Syndrome

In the 12-week controlled study, no patient in any treatment group experienced macrophage activation syndrome (MAS) while on assigned treatment; 3 per 112 (3%) developed MAS during open-label treatment with ACTEMRA. One patient in the placebo group escaped to ACTEMRA 12 mg per kg at Week 2 due to severe disease activity, and ultimately developed MAS at Day 70. Two additional patients developed MAS during the long-term extension. All 3 patients had ACTEMRA dose interrupted (2 patients) or discontinued (1 patient) for the MAS event, received treatment, and the MAS resolved without sequelae. Based on a limited number of cases, the incidence of MAS does not appear to be elevated in the ACTEMRA SJIA clinical development experience; however, no definitive conclusions can be made.

Infusion Reactions

In the 12-week controlled phase, 4% of ACTEMRA and 0% of placebo-treated patients experienced events occurring during infusion.

Within 24 hours after infusion, 16% of patients in the ACTEMRA treatment group and 5% of patients in the placebo group experienced an event. In the ACTEMRA group the events included rash, urticaria, diarrhea, epigastric discomfort, arthralgia, and headache. One of these events, urticaria, was considered serious.

Anaphylaxis

Anaphylaxis was reported in 1 out of 112 patients (less than 1%) treated with ACTEMRA during the controlled and open-label extension study.

DRUG INTERACTIONS

In GCA patients, no effect of concomitant corticosteroid on ACTEMRA exposure was observed.

Cytochrome P450s in the liver are down-regulated by infection and inflammation stimuli including cytokines such as IL-6. Inhibition of IL-6 signaling in RA patients treated with ACTEMRA may restore CYP450 activities to higher levels than those in the absence of ACTEMRA leading to increased metabolism of drugs that are CYP450 substrates.

Exercise caution when coadministering ACTEMRA with CYP3A4 substrate drugs where decrease in effectiveness is undesirable, e.g., oral contraceptives, lovastatin, atorvastatin, etc.

USE IN PREGNANCY

There is a pregnancy exposure registry that monitors pregnancy outcomes in women exposed to ACTEMRA during pregnancy. Physicians are encouraged to register patients and pregnant women are encouraged to register themselves by calling 1-877-311-8972.

The limited available data with ACTEMRA in pregnant women are not sufficient to determine whether there is a drug-associated risk for major birth defects and miscarriage.

You may report side effects to the FDA at (800) FDA-1088 or www.fda.gov/medwatch. You may also report side effects to Genentech at (888) 835-2555.

Please see full Prescribing Information, including Boxed WARNING, for additional important safety information.