Medical Editor: John P. Cunha, DO, FACOEP
What Is Remicade?
Remicade (infliximab) is a chimeric IgG1k monoclonal antibody used to treat rheumatoid arthritis, psoriatic arthritis, ulcerative colitis, Crohn's disease, and ankylosing spondylitis. Remicade is also used to treat severe or disabling plaque psoriasis (raised, silvery flaking of the skin). Remicade is often used when other medicines have not been effective. Remicade blocks the action of a protein in your body called tumor necrosis factor-alpha (TNF-alpha).
What Are Side Effects of Remicade?
Common side effects of Remicade include:
- stomach pain,
- stuffy nose,
- sinus pain,
- skin rash, or
- flushing (warmth, redness, or tingly feeling).
Tell your doctor if you experience serious side effects of Remicade including:
- pain or swelling at injection site,
- joint or muscle pain,
- swelling of ankles or feet,
- easy bruising or bleeding,
- vision changes,
- muscle weakness,
- numbness and tingling of arms or legs,
- butterfly-shaped facial rash,
- chest pain,
- pain/redness/swelling of arms or legs,
- shortness of breath, or
- fast/slow/irregular heartbeat.
Dosage for Remicade
The dosing of Remicade varies, and depends on the condition being treated.
What Drugs, Substances, or Supplements Interact with Remicade?
Other drugs may interact with Remicade. Tell your doctor all prescription and over-the-counter medications and supplements you use.
Remicade During Pregnancy and Breastfeeding
During pregnancy, Remicade should be used only when prescribed. It is unknown if this medication passes into breast milk. It is unlikely to harm a nursing infant. Consult your doctor before breastfeeding.
Our Remicade (infliximab) Side Effects Drug Center provides a comprehensive view of available drug information on the potential side effects when taking this medication.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
Get emergency medical help if you have signs of an allergic reaction: hives; chest pain, difficult breathing; fever, chills, severe dizziness; swelling of your face, lips, tongue, or throat.
Some side effects may occur during the injection. Tell your caregiver if you feel dizzy, nauseated, light-headed, itchy or tingly, short of breath, or have a headache, fever, chills, muscle or joint pain, pain or tightness in your throat, chest pain, or trouble swallowing during the injection. Infusion reactions may also occur within 1 or 2 hours after injection.
Serious and sometimes fatal infections may occur during treatment with infliximab. Call your doctor right away if you have signs of infection such as: fever, extreme tiredness, flu symptoms, cough, or skin symptoms (pain, warmth, or redness).
Also call your doctor if you have:
- skin changes, new growths on the skin;
- pale skin, easy bruising or bleeding;
- delayed allergic reaction (up to 12 days after receiving infliximab)--fever, sore throat, trouble swallowing, headache, joint or muscle pain, skin rash, or swelling in your face or hands;
- liver problems--right-sided upper stomach pain, loss of appetite, yellowing of your skin or eyes, and not feeling well;
- lupus-like syndrome--joint pain or swelling, chest discomfort, feeling short of breath, skin rash on your cheeks or arms (worsens in sunlight);
- nerve problems--numbness or tingling, problems with vision, weakness in your arms or legs, seizure;
- new or worsening psoriasis--skin redness or scaly patches, raised bumps filled with pus;
- signs of heart failure--shortness of breath with swelling of your ankles or feet, rapid weight gain;
- signs of a stroke--sudden numbness or weakness, trouble speaking or understanding what is said to you, problems with vision or balance, severe headache;
- signs of lymphoma--fever, night sweats, weight loss, stomach pain or swelling, chest pain, cough, trouble breathing, swollen glands (in your neck, armpits, or groin); or
- signs of tuberculosis--fever, cough, night sweats, loss of appetite, weight loss, feeling constantly tired.
Serious infections may be more likely in adults who are 65 years or older.
Common side effects may include:
- stuffy nose, sinus pain;
- fever, chills, sore throat;
- cough, chest pain, shortness of breath;
- high or low blood pressure;
- headache, feeling light-headed;
- rash, itching; or
- stomach pain.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
Clinical Trials Experience
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.
Adverse Reactions In Adults
The data described herein reflect exposure to Infliximab in 4779 adult patients (1304 patients with RA, 1106 patients with CD, 202 with AS, 293 with PsA, 484 with UC, 1373 with Ps, and 17 patients with other conditions), including 2625 patients exposed beyond 30 weeks and 374 exposed beyond 1 year. [For information on adverse reactions in pediatric patients see ADVERSE REACTIONS]. One of the most-common reasons for discontinuation of treatment was infusion-related reactions (e.g., dyspnea, flushing, headache and rash).
Adverse Reactions During Or Shortly After Infusion
An infusion reaction was defined in clinical trials as any adverse event occurring during an infusion or within 1 hour after an infusion. In all the clinical studies, approximately 20% of Infliximab-treated patients experienced an infusion reaction compared with 10% of placebo-treated patients. Of Infliximab-treated patients who had an infusion reaction during the induction period, 27% experienced an infusion reaction during the maintenance period. Of patients who did not have an infusion reaction during the induction period, 9% experienced an infusion reaction during the maintenance period.
Among all Infliximab infusions, 3% were accompanied by nonspecific symptoms such as fever or chills, 1% were accompanied by cardiopulmonary reactions (primarily chest pain, hypotension, hypertension or dyspnea), and <1% were accompanied by pruritus, urticaria, or the combined symptoms of pruritus/urticaria and cardiopulmonary reactions. Serious infusion reactions occurred in <1% of patients and included anaphylaxis, convulsions, erythematous rash and hypotension. Approximately 3% of patients discontinued Infliximab because of infusion reactions, and all patients recovered with treatment and/or discontinuation of the infusion. Infliximab infusions beyond the initial infusion were not associated with a higher incidence of reactions. The infusion reaction rates remained stable in Ps through 1 year in Ps Study I. In psoriasis Study II, the rates were variable over time and somewhat higher following the final infusion than after the initial infusion. Across the 3 Ps studies, the percent of total infusions resulting in infusion reactions (i.e., an adverse event occurring within 1 hour) was 7% in the 3 mg/kg group, 4% in the 5 mg/kg group, and 1% in the placebo group.
Patients who became positive for antibodies to infliximab were more likely (approximately two-to three-fold) to have an infusion reaction than were those who were negative. Use of concomitant immunosuppressant agents appeared to reduce the frequency of both antibodies to infliximab and infusion reactions [see ADVERSE REACTIONS and DRUG INTERACTIONS].
Infusion Reactions Following Re-administration
In a clinical trial of patients with moderate to severe Ps designed to assess the efficacy of long-term maintenance therapy versus re-treatment with an induction regimen of Infliximab following disease flare, 4% (8/219) of patients in the re-treatment induction therapy arm experienced serious infusion reactions versus <1% (1/222) in the maintenance therapy arm. Patients enrolled in this trial did not receive any concomitant immunosuppressant therapy. In this study, the majority of serious infusion reactions occurred during the second infusion at Week 2. Symptoms included, but were not limited to, dyspnea, urticaria, facial edema, and hypotension. In all cases, Infliximab treatment was discontinued and/or other treatment instituted with complete resolution of signs and symptoms.
Delayed Reactions/Reactions Following Re-administration
In Ps studies, approximately 1% of Infliximab-treated patients experienced a possible delayed hypersensitivity reaction, generally reported as serum sickness or a combination of arthralgia and/or myalgia with fever and/or rash. These reactions generally occurred within 2 weeks after repeat infusion.
In Infliximab clinical studies, treated infections were reported in 36% of Infliximab-treated patients (average of 51 weeks of follow-up) and in 25% of placebo-treated patients (average of 37 weeks of follow-up). The infections most frequently reported were respiratory tract infections (including sinusitis, pharyngitis, and bronchitis) and urinary tract infections. Among Infliximab-treated patients, serious infections included pneumonia, cellulitis, abscess, skin ulceration, sepsis, and bacterial infection. In clinical trials, 7 opportunistic infections were reported; 2 cases each of coccidioidomycosis (1 case was fatal) and histoplasmosis (1 case was fatal), and 1 case each of pneumocystosis, nocardiosis and cytomegalovirus. Tuberculosis (TB) was reported in 14 patients, 4 of whom died due to miliary tuberculosis. Other cases of TB, including disseminated TB, also have been reported post-marketing. Most of these cases of TB occurred within the first 2 months after initiation of therapy with Infliximab and may reflect recrudescence of latent disease [see WARNINGS AND PRECAUTIONS]. In the 1-year placebo-controlled studies RA I and RA II, 5.3% of patients receiving Infliximab every 8 weeks with MTX developed serious infections as compared to 3.4% of placebo patients receiving MTX. Of 924 patients receiving Infliximab, 1.7% developed pneumonia and 0.4% developed TB, when compared to 0.3% and 0.0% in the placebo arm respectively. In a shorter (22-week) placebo-controlled study of 1082 RA patients randomized to receive placebo, 3 mg/kg or 10 mg/kg Infliximab infusions at 0, 2, and 6 weeks, followed by every 8 weeks with MTX, serious infections were more frequent in the 10 mg/kg Infliximab group (5.3%) than the 3 mg/kg or placebo groups (1.7% in both). During the 54-week Crohn's II Study, 15% of patients with fistulizing CD developed a new fistula-related abscess.
In Infliximab clinical studies in patients with UC, infections treated with antimicrobials were reported in 27% of Infliximab-treated patients (average of 41 weeks of follow-up) and in 18% of placebo-treated patients (average 32 weeks of follow-up). The types of infections, including serious infections, reported in patients with UC were similar to those reported in other clinical studies.
The onset of serious infections may be preceded by constitutional symptoms such as fever, chills, weight loss, and fatigue. The majority of serious infections, however, may also be preceded by signs or symptoms localized to the site of the infection.
Approximately half of Infliximab-treated patients in clinical trials who were antinuclear antibody (ANA) negative at baseline developed a positive ANA during the trial compared with approximately one-fifth of placebo-treated patients. Anti-dsDNA antibodies were newly detected in approximately one-fifth of Infliximab-treated patients compared with 0% of placebo-treated patients. Reports of lupus and lupus-like syndromes, however, remain uncommon.
In controlled trials, more Infliximab-treated patients developed malignancies than placebo-treated patients [see WARNINGS AND PRECAUTIONS].
In a randomized controlled clinical trial exploring the use of Infliximab in patients with moderate to severe COPD who were either current smokers or ex-smokers, 157 patients were treated with Infliximab at doses similar to those used in RA and CD. Of these Infliximab- treated patients, 9 developed a malignancy, including 1 lymphoma, for a rate of 7.67 cases per 100 patient-years of follow-up (median duration of follow-up 0.8 years; 95% CI 3.51 - 14.56). There was 1 reported malignancy among 77 control patients for a rate of 1.63 cases per 100 patient-years of follow-up (median duration of follow-up 0.8 years; 95% CI 0.04 - 9.10). The majority of the malignancies developed in the lung or head and neck [see WARNINGS AND PRECAUTIONS].
Adverse Reactions In Patients With NYHA Class III/IV Heart Failure
In a randomized, double-blind study evaluating Infliximab in moderate or severe heart failure (NYHA Class III/IV; left ventricular ejection fraction ≤35%), 150 patients were randomized to receive treatment with 3 infusions of Infliximab 10 mg/kg, 5 mg/kg, or placebo, at 0, 2, and 6 weeks. Higher incidences of mortality and hospitalization due to worsening heart failure were observed in patients receiving the 10 mg/kg Infliximab dose. At 1 year, 8 patients in the 10 mg/kg Infliximab group had died compared with 4 deaths each in the 5 mg/kg Infliximab and the placebo groups. There were trends toward increased dyspnea, hypotension, angina, and dizziness in both the 10 mg/kg and 5 mg/kg Infliximab treatment groups, versus placebo. Infliximab has not been studied in patients with mild heart failure (NYHA Class I/II) [see CONTRAINDICATIONS and WARNINGS AND PRECAUTIONS].
Severe liver injury, including acute liver failure and autoimmune hepatitis, has been reported in patients receiving Infliximab [see WARNINGS AND PRECAUTIONS]. Reactivation of hepatitis B virus has occurred in patients receiving TNF blockers, including Infliximab, who are chronic carriers of this virus [see WARNINGS AND PRECAUTIONS].
In clinical trials in RA, CD, UC, AS, Ps, and PsA, elevations of aminotransferases were observed (ALT more common than AST) in a greater proportion of patients receiving Infliximab than in controls (Table 1), both when Infliximab was given as monotherapy and when it was used in combination with other immunosuppressive agents. In general, patients who developed ALT and AST elevations were asymptomatic, and the abnormalities decreased or resolved with either continuation or discontinuation of Infliximab, or modification of concomitant medications.
Table 1: Proportion of Patients with Elevated ALT in Clinical Trials in Adults
|Proportion of patients with elevated ALT|
|>1 to <3 x ULN||≥3 x ULN||≥5 x ULN|
|a Placebo patients received methotrexate while Infliximab patients received both Infliximab and methotrexate. Median follow-up was 58 weeks.
b Placebo patients in the 2 Phase 3 trials in CD received an initial dose of 5 mg/kg Infliximab at study start and were on placebo in the maintenance phase. Patients who were randomized to the placebo maintenance group and then later crossed over to Infliximab are included in the Infliximab group in ALT analysis. Median follow-up was 54 weeks.
c Median follow-up was 30 weeks. Specifically, the median duration of follow-up was 30 weeks for placebo and 31 weeks for Infliximab.
d Median follow-up was 24 weeks for the placebo group and 102 weeks for the Infliximab group.
e Median follow-up was 39 weeks for the Infliximab group and 18 weeks for the placebo group.
f ALT values are obtained in 2 Phase 3 Ps studies with median follow-up of 50 weeks for Infliximab and 16 weeks for placebo.
Adverse Reactions In Psoriasis Studies
During the placebo-controlled portion across the 3 clinical trials up to Week 16, the proportion of patients who experienced at least 1 serious adverse reaction (SAE; defined as resulting in death, life threatening, requires hospitalization, or persistent or significant disability/incapacity) was 0.5% in the 3 mg/kg Infliximab group, 1.9% in the placebo group, and 1.6% in the 5 mg/kg Infliximab group.
Among patients in the 2 Phase 3 studies, 12.4% of patients receiving Infliximab 5 mg/kg every 8 weeks through 1 year of maintenance treatment experienced at least 1 SAE in Study I. In Study II, 4.1% and 4.7% of patients receiving Infliximab 3 mg/kg and 5 mg/kg every 8 weeks, respectively, through 1 year of maintenance treatment experienced at least 1 SAE.
One death due to bacterial sepsis occurred 25 days after the second infusion of 5 mg/kg Infliximab. Serious infections included sepsis, and abscesses. In Study I, 2.7% of patients receiving Infliximab 5 mg/kg every 8 weeks through 1 year of maintenance treatment experienced at least 1 serious infection. In Study II, 1.0% and 1.3% of patients receiving Infliximab 3 mg/kg and 5 mg/kg, respectively, through 1 year of treatment experienced at least 1 serious infection. The most common serious infection (requiring hospitalization) was abscess (skin, throat, and peri-rectal) reported by 5 (0.7%) patients in the 5 mg/kg Infliximab group. Two active cases of tuberculosis were reported: 6 weeks and 34 weeks after starting Infliximab.
In the placebo-controlled portion of the Ps studies, 7 of 1123 patients who received Infliximab at any dose were diagnosed with at least one NMSC compared to 0 of 334 patients who received placebo.
In the Ps studies, 1% (15/1373) of patients experienced serum sickness or a combination of arthralgia and/or myalgia with fever, and/or rash, usually early in the treatment course. Of these patients, 6 required hospitalization due to fever, severe myalgia, arthralgia, swollen joints, and immobility.
Other Adverse Reactions In Adults
Safety data are available from 4779 Infliximab-treated adult patients, including 1304 with RA, 1106 with CD, 484 with UC, 202 with AS, 293 with PsA, 1373 with Ps and 17 with other conditions. [For information on other adverse reactions in pediatric patients, see ADVERSE REACTIONS]. Adverse reactions reported in ≥5% of all patients with RA receiving 4 or more infusions are in Table 2. The types and frequencies of adverse reactions observed were similar in Infliximab-treated RA, AS, PsA, Ps, and CD patients except for abdominal pain, which occurred in 26% of Infliximab-treated patients with CD. In the CD studies, there were insufficient numbers and duration of follow-up for patients who never received Infliximab to provide meaningful comparisons.
Table 2: Adverse Reactions that Occurred in ≥ 5% of Patients who Received ≥ 4 Infliximab Infusions for RA
|Average weeks of follow-up||59 weeks||66 weeks|
|Upper respiratory tract infection||25%||32%|
|Urinary tract infection||6%||8%|
The most common serious adverse reactions observed in clinical trials were infections [see ADVERSE REACTIONS]. Other serious, medically relevant adverse reactions ≥0.2% or clinically significant adverse reactions by body system were as follows:
- Body as a whole: allergic reaction, edema
- Blood: pancytopenia
- Cardiovascular: hypotension
- Gastrointestinal: constipation, intestinal obstruction
- Central and Peripheral Nervous: dizziness
- Heart Rate and Rhythm: bradycardia
- Liver and Biliary: hepatitis
- Metabolic and Nutritional: dehydration
- Platelet, Bleeding and Clotting: thrombocytopenia
- Neoplasms: lymphoma
- Red Blood Cell: anemia, hemolytic anemia
- Resistance Mechanism: cellulitis, sepsis, serum sickness, sarcoidosis
- Respiratory: lower respiratory tract infection (including pneumonia), pleurisy, pulmonary edema
- Skin and Appendages: increased sweating
- Vascular (Extracardiac): thrombophlebitis
- White Cell and Reticuloendothelial: leukopenia, lymphadenopathy
Adverse Reactions In Pediatric Patients
Adverse Reactions In Pediatric Patients With Crohn's Disease
There were some differences in the adverse reactions observed in the pediatric patients receiving Infliximab compared to those observed in adults with CD. These differences are discussed in the following paragraphs.
The following adverse reactions were reported more commonly in 103 randomized pediatric CD patients administered 5 mg/kg Infliximab through 54 weeks than in 385 adult CD patients receiving a similar treatment regimen: anemia (11%), leukopenia (9%), flushing (9%), viral infection (8%), neutropenia (7%), bone fracture (7%), bacterial infection (6%), and respiratory tract allergic reaction (6%).
Infections were reported in 56% of randomized pediatric patients in Study Peds Crohn's and in 50% of adult patients in Study Crohn's I. In Study Peds Crohn's, infections were reported more frequently for patients who received every 8-week as opposed to every 12-week infusions (74% and 38%, respectively), while serious infections were reported for 3 patients in the every 8-week and 4 patients in the every 12-week maintenance treatment group. The most commonly reported infections were upper respiratory tract infection and pharyngitis, and the most commonly reported serious infection was abscess. Pneumonia was reported for 3 patients, (2 in the every 8-week and 1 in the every 12-week maintenance treatment groups). Herpes zoster was reported for 2 patients in the every 8-week maintenance treatment group.
In Study Peds Crohn's, 18% of randomized patients experienced 1 or more infusion reactions, with no notable difference between treatment groups. Of the 112 patients in Study Peds Crohn's, there were no serious infusion reactions, and 2 patients had non-serious anaphylactoid reactions.
Elevations of ALT up to 3 times the upper limit of normal (ULN) were seen in 18% of pediatric patients in CD clinical trials; 4% had ALT elevations ≥3 × ULN, and 1% had elevations ≥5 × ULN. (Median follow-up was 53 weeks).
Adverse Reactions In Pediatric Patients With Ulcerative Colitis
Overall, the adverse reactions reported in the pediatric UC trial and adult UC (Study UC I and Study UC II) studies were generally consistent. In a pediatric UC trial, the most common adverse reactions were upper respiratory tract infection, pharyngitis, abdominal pain, fever, and headache.
Infections were reported in 31 (52%) of 60 treated patients in the pediatric UC trial and 22 (37%) required oral or parenteral antimicrobial treatment. The proportion of patients with infections in the pediatric UC trial was similar to that in the pediatric CD study (Study Peds Crohn's) but higher than the proportion in the adults' UC studies (Study UC I and Study UC II). The overall incidence of infections in the pediatric UC trial was 13/22 (59%) in the every 8 week maintenance treatment group. Upper respiratory tract infection (7/60 [12%]) and pharyngitis (5/60 [8%]) were the most frequently reported respiratory system infections. Serious infections were reported in 12% (7/60) of all treated patients.
Elevations of ALT up to 3 times the upper limit of normal (ULN) were seen in 17% (10/60) of pediatric patients in the pediatric UC trial; 7% (4/60) had ALT elevations ≥3 × ULN, and 2% (1/60) had elevations ≥5 × ULN (median follow-up was 49 weeks).
Overall, 8 of 60 (13%) treated patients experienced one or more infusion reactions, including 4 of 22 (18%) patients in the every 8-week treatment maintenance group. No serious infusion reactions were reported.
In the pediatric UC trial, 45 patients were in the 12 to 17 year age group and 15 in the 6 to 11 year age group. The numbers of patients in each subgroup are too small to make any definitive conclusions about the effect of age on safety events. There were higher proportions of patients with serious adverse events (40% vs. 18%) and discontinuation due to adverse events (40% vs. 16%) in the younger age group than in the older age group. While the proportion of patients with infections was also higher in the younger age group (60% vs. 49%), for serious infections, the proportions were similar in the two age groups (13% in the 6 to 11 year age group vs. 11% in the 12 to 17 year age group). Overall proportions of adverse reactions, including infusion reactions, were similar between the 6 to 11 and 12 to 17 year age groups (13%).
As with all therapeutic proteins, there is potential for immunogenicity. The detection of antibody formation is highly dependent on the sensitivity and specificity of the assay. Additionally, the observed incidence of antibody (including neutralizing antibody) positivity in an assay may be influenced by several factors, including assay methodology, sample handling, timing of sample collection, concomitant medications, and underlying disease. For these reasons, comparison of the incidence of antibodies in the studies described below with the incidence of antibodies in other studies or to other infliximab products may be misleading.
Treatment with Infliximab can be associated with the development of antibodies to infliximab. An enzyme immunoassay (EIA) method was originally used to measure anti- infliximab antibodies in clinical studies of Infliximab. The EIA method is subject to interference by serum infliximab, possibly resulting in an underestimation of the rate of patient antibody formation. A separate, drug-tolerant electrochemiluminescence immunoassay (ECLIA) method for detecting antibodies to infliximab was subsequently developed and validated. This method is 60-fold more sensitive than the original EIA. With the ECLIA method, all clinical samples can be classified as either positive or negative for antibodies to infliximab without the need for the inconclusive category.
The incidence of antibodies to infliximab was based on the original EIA method in all clinical studies of Infliximab except for the Phase 3 study in pediatric patients with UC where the incidence of antibodies to infliximab was detected using both the EIA and ECLIA methods.
Immunogenicity In Adult Patients
The incidence of antibodies to infliximab in patients with RA and CD given a 3-dose induction regimen followed by maintenance dosing was approximately 10% as assessed through 1 to 2 years of Infliximab treatment. A higher incidence of antibodies to infliximab was observed in CD patients receiving Infliximab after drug-free intervals >16 weeks. In a PsA study in which 191 patients received 5 mg/kg with or without MTX, antibodies to infliximab occurred in 15% of patients. The majority of antibody-positive patients had low titers. Antibody development was lower among RA and CD patients receiving immunosuppressant therapies such as 6-MP/AZA or MTX. Patients who were antibody-positive were more likely to have higher rates of clearance, have reduced efficacy, and to experience an infusion reaction than were patients who were antibody negative [see ADVERSE REACTIONS]. In the Ps Study II, which included both the 5 mg/kg and 3 mg/kg doses, antibodies were observed in 36% of patients treated with 5 mg/kg every 8 weeks for 1 year, and in 51% of patients treated with 3 mg/kg every 8 weeks for 1 year.
In the Ps Study III, which also included both the 5 mg/kg and 3 mg/kg doses, antibodies were observed in 20% of patients treated with 5 mg/kg induction (weeks 0, 2 and 6), and in 27% of patients treated with 3 mg/kg induction. Despite the increase in antibody formation, the infusion reaction rates in Studies I and II in patients treated with 5 mg/kg induction followed by every 8 week maintenance for 1 year and in Study III in patients treated with 5 mg/kg induction (14.1%-23.0%) and serious infusion reaction rates (<1%) were similar to those observed in other study populations. The clinical significance of apparent increased immunogenicity on efficacy and infusion reactions in Ps patients as compared to patients with other diseases treated with Infliximab over the long term is not known.
Immunogenicity In Pediatric Patients With Crohn's Disease
In Study Peds Crohn's, in which all patients received stable doses of 6-MP, AZA, or MTX, excluding inconclusive samples, 3 of 24 patients had antibodies to infliximab. Although 105 patients were tested for antibodies to infliximab, 81 patients were classified as inconclusive because they could not be ruled as negative due to assay interference by the presence of infliximab in the sample.
Immunogenicity In Pediatric Patients With Ulcerative Colitis
In the pediatric UC trial, 58 patients were evaluated for antibodies to infliximab using the EIA as well as the drug-tolerant ECLIA. With the EIA, 4 of 58 (7%) patients had antibodies to infliximab. With the ECLIA, 30 of 58 (52%) patients had antibodies to infliximab. The higher incidence of antibodies to infliximab by the ECLIA method was due to the 60-fold higher sensitivity compared to the EIA method. While EIA-positive patients generally had undetectable trough infliximab concentrations, ECLIA-positive patients could have detectable trough concentrations of infliximab because the ECLIA assay is more sensitive and drug-tolerant.
Adverse reactions, some with fatal outcomes, have been identified during post approval use of Infliximab in adult and pediatric patients. 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.
Postmarketing Adverse Reactions In Adults And Pediatric Patients
- Neutropenia [see WARNINGS AND PRECAUTIONS], agranulocytosis (including infants exposed in utero to infliximab), idiopathic thrombocytopenic purpura, thrombotic thrombocytopenic purpura.
- Interstitial lung disease (including pulmonary fibrosis/interstitial pneumonitis and rapidly progressive disease).
- Pericardial effusion, systemic and cutaneous vasculitis.
- Erythema multiforme, Stevens-Johnson Syndrome, toxic epidermal necrolysis, linear IgA bullous dermatosis (LABD), acute generalized exanthematous pustulosis (AGEP), new onset and worsening psoriasis (all subtypes including pustular, primarily palmoplantar), lichenoid reactions.
- Peripheral demyelinating disorders (such as Guillain-Barré syndrome, chronic inflammatory demyelinating polyneuropathy, and multifocal motor neuropathy) transverse myelitis, and neuropathies (additional neurologic reactions have also been observed) [see WARNINGS AND PRECAUTIONS].
- Acute liver failure, jaundice, hepatitis, and cholestasis [see WARNINGS AND PRECAUTIONS].
- Serious infections [see WARNINGS AND PRECAUTIONS] and vaccine breakthrough infection including bovine tuberculosis (disseminated BCG infection) following vaccination in an infant exposed in utero to infliximab [see WARNINGS AND PRECAUTIONS].
- Malignancies, including leukemia, melanoma, Merkel cell carcinoma, and cervical cancer [see WARNINGS AND PRECAUTIONS].
- Anaphylactic reactions, including anaphylactic shock, laryngeal/pharyngeal edema and severe bronchospasm, and seizure have been associated with Infliximab administration.
- Transient visual loss have been reported in association with Infliximab during or within 2 hours of infusion. Cerebrovascular accidents, myocardial ischemia/infarction (some fatal), and arrhythmia occurring within 24 hours of initiation of infusion have also been reported [see WARNINGS AND PRECAUTIONS].
Postmarketing Serious Adverse Reactions In Pediatric Patients
The following serious adverse reactions have been reported in the post-marketing experience in pediatric patients: infections (some fatal) including opportunistic infections and tuberculosis, infusion reactions, hypersensitivity reactions, malignancies, including hepatosplenic T-cell lymphomas [see BOXED WARNING and WARNINGS AND PRECAUTIONS], transient hepatic enzyme abnormalities, lupus-like syndromes, and the development of autoantibodies.
Other Biological Products
The combination of Infliximab with other biological products used to treat the same conditions as Infliximab is not recommended [see WARNINGS AND PRECAUTIONS].
An increased risk of serious infections was seen in clinical studies of other TNF blockers used in combination with anakinra or abatacept, with no added clinical benefit. Because of the nature of the adverse reactions seen with these combinations with TNF blocker therapy, similar toxicities may also result from the combination of anakinra or abatacept with other TNF blockers. Therefore, the combination of Infliximab and anakinra or abatacept is not recommended [see WARNINGS AND PRECAUTIONS].
The concomitant use of tocilizumab with biological DMARDs such as TNF antagonists, including Infliximab, should be avoided because of the possibility of increased immunosuppression and increased risk of infection.
Methotrexate And Other Concomitant Medications
Specific drug interaction studies, including interactions with methotrexate (MTX), have not been conducted. The majority of patients in RA or CD clinical studies received one or more concomitant medications. In RA, concomitant medications besides MTX were nonsteroidal anti-inflammatory agents (NSAIDs), folic acid, corticosteroids and/or narcotics. Concomitant CD medications were antibiotics, antivirals, corticosteroids, 6-MP/AZA and aminosalicylates. In PsA clinical trials, concomitant medications included MTX in approximately half of the patients as well as NSAIDs, folic acid and corticosteroids. Concomitant MTX use may decrease the incidence of anti-infliximab antibody production and increase infliximab concentrations.
Patients with CD who received immunosuppressants tended to experience fewer infusion reactions compared to patients on no immunosuppressants [see ADVERSE REACTIONS ]. Serum infliximab concentrations appeared to be unaffected by baseline use of medications for the treatment of CD including corticosteroids, antibiotics (metronidazole or ciprofloxacin) and aminosalicylates.
Cytochrome P450 Substrates
The formation of CYP450 enzymes may be suppressed by increased levels of cytokines (e.g., TNFα, IL-1, IL-6, IL-10, IFN) during chronic inflammation. Therefore, it is expected that for a molecule that antagonizes cytokine activity, such as infliximab, the formation of CYP450 enzymes could be normalized. Upon initiation or discontinuation of Infliximab in patients being treated with CYP450 substrates with a narrow therapeutic index, monitoring of the effect (e.g., warfarin) or drug concentration (e.g., cyclosporine or theophylline) is recommended and the individual dose of the drug product may be adjusted as needed.
Live Vaccines/Therapeutic Infectious Agents
It is recommended that live vaccines not be given concurrently with Infliximab. It is also recommended that live vaccines not be given to infants after in utero exposure to infliximab for at least 6 months following birth [see WARNINGS AND PRECAUTIONS].
It is recommended that therapeutic infectious agents not be given concurrently with Infliximab [see WARNINGS AND PRECAUTIONS].
Read the entire FDA prescribing information for Remicade (Infliximab)
© Remicade Patient Information is supplied by Cerner Multum, Inc. and Remicade Consumer information is supplied by First Databank, Inc., used under license and subject to their respective copyrights.
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