| Pharmacotherapeutic group: Selective immunosuppressive agents. ATC code: L04AB04Mechanism of actionAdalimumab binds specifically to TNF and neutralizes the biological function of TNF by blocking its interaction with the p55 and p75 cell surface TNF receptors. Adalimumab also modulates biological responses that are induced or regulated by TNF, including changes in the levels of adhesion molecules responsible for leukocyte migration (ELAM-1, VCAM-1, and ICAM-1 with an IC50 of 0.1-0.2 nM). Pharmacodynamic effectsAfter treatment with Humira, a rapid decrease in levels of acute phase reactants of inflammation (C-reactive protein (CRP) and erythrocyte sedimentation rate (ESR)) and serum cytokines (IL-6) was observed, compared to baseline in patients with rheumatoid arthritis. Serum levels of matrix metalloproteinases (MMP-1 and MMP-3) that produce tissue remodelling responsible for cartilage destruction were also decreased after Humira administration. Patients treated with Humira usually experienced improvement in haematological signs of chronic inflammation.A rapid decrease in CRP levels was also observed in patients with polyarticular juvenile idiopathic arthritis, Crohn's disease and ulcerative colitis after treatment with Humira. In patients with Crohn's disease, a reduction of the number of cells expressing inflammatory markers in the colon including a significant reduction of expression of TNF was seen. Endoscopic studies in intestinal mucosa have shown evidence of mucosal healing in adalimumab treated patients.Clinical efficacy and safetyAdults with Rheumatoid arthritis Humira was evaluated in over 3000 patients in all rheumatoid arthritis clinical trials. Some patients were treated for up to 60 months duration. The efficacy and safety of Humira for the treatment of rheumatoid arthritis were assessed in five randomised, double-blind and well-controlled studies. RA study I evaluated 271 patients with moderately to severely active rheumatoid arthritis who were ≥ 18 years old, had failed therapy with at least one disease-modifying, anti rheumatic drug and had insufficient efficacy with methotrexate at doses of 12.5 to 25 mg (10 mg if methotrexate-intolerant) every week and whose methotrexate dose remained constant at 10 to 25 mg every week. Doses of 20, 40 or 80 mg of Humira or placebo were given every other week for 24 weeks. RA study II evaluated 544 patients with moderately to severely active rheumatoid arthritis who were ≥ 18 years old and had failed therapy with at least one disease-modifying, anti-rheumatic drugs. Doses of 20 or 40 mg of Humira were given by subcutaneous injection every other week with placebo on alternative weeks or every week for 26 weeks; placebo was given every week for the same duration. No other disease-modifying anti-rheumatic drugs were allowed.RA study III evaluated 619 patients with moderately to severely active rheumatoid arthritis who were ≥ 18 years old, and who had an ineffective response to methotrexate at doses of 12.5 to 25 mg or have been intolerant to 10 mg of methotrexate every week. There were three groups in this study. The first received placebo injections every week for 52 weeks. The second received 20 mg of Humira every week for 52 weeks. The third group received 40 mg of Humira every other week with placebo injections on alternate weeks. Thereafter, patients enrolled in an open-label extension phase in which 40 mg of Humira was administered every other week up to 10 years.RA study IV primarily assessed safety in 636 patients with moderately to severely active rheumatoid arthritis who were ≥ 18 years old. Patients were permitted to be either disease-modifying, anti-rheumatic drug-naïve or to remain on their pre-existing rheumatologic therapy provided that therapy was stable for a minimum of 28 days. These therapies include methotrexate, leflunomide, hydroxychloroquine, sulfasalazine and/or gold salts. Patients were randomised to 40 mg of Humira or placebo every other week for 24 weeks. RA study V evaluated 799 methotrexate-naïve, adult patients with moderate to severely active early rheumatoid arthritis (mean disease duration less than 9 months). This study evaluated the efficacy of Humira 40 mg every other week/methotrexate combination therapy, Humira 40 mg every other week monotherapy and methotrexate monotherapy in reducing the signs and symptoms and rate of progression of joint damage in rheumatoid arthritis for 104 weeks.The primary end point in RA studies I, II and III and the secondary endpoint in RA study IV was the percent of patients who achieved an ACR 20 response at Week 24 or 26. The primary endpoint in RA study V was the percent of patients who achieved an ACR 50 response at Week 52. RA studies III and V had an additional primary endpoint at 52 weeks of retardation of disease progression (as detected by X-ray results). RA study III also had a primary endpoint of changes in quality of life.ACR responseThe percent of Humira-treated patients achieving ACR 20, 50 and 70 responses was consistent across RA studies I, II and III. The results for the 40 mg every other week dose are summarised in Table 3. Table 3 ACR Responses in Placebo-Controlled Trials(Percent of Patients)| Response
| RA Study Ia**
| RA Study IIa**
| RA Study IIIa**
| | Placebo/ MTXc | Humirab/ MTXc | Placebo
| Humirab | Placebo/ MTXc | Humirab/ MTXc | | n=60
| n=63
| n=110
| n=113
| n=200
| n=207
| | ACR 20
| | | | | | | | 6 months
| 13.3%
| 65.1%
| 19.1%
| 46.0%
| 29.5%
| 63.3%
| | 12 months
| NA
| NA
| NA
| NA
| 24.0%
| 58.9%
| | ACR 50
| | | | | | | | 6 months
| 6.7%
| 52.4%
| 8.2%
| 22.1%
| 9.5%
| 39.1%
| | 12 months
| NA
| NA
| NA
| NA
| 9.5%
| 41.5%
| | ACR 70
| | | | | | | | 6 months
| 3.3%
| 23.8%
| 1.8%
| 12.4%
| 2.5%
| 20.8%
| | 12 months
| NA
| NA
| NA
| NA
| 4.5%
| 23.2%
| a
RA study I at 24 weeks, RA study II at 26 weeks , and RA study III at 24 and 52 weeks
b
40 mg Humira administered every other week
c
MTX = methotrexate
**p < 0.01, Humira versus
placeboIn RA studies I-IV, all individual components of the ACR response criteria (number of tender and swollen joints, physician and patient assessment of disease activity and pain, disability index (HAQ) scores and CRP (mg/dl) values) improved at 24 or 26 weeks compared to placebo. In RA study III, these improvements were maintained throughout 52 weeks. In the open-label extension for RA study III, most patients who were ACR responders maintained response when followed for up to 10 years. Of 207 patients, 114 patients continued on Humira 40 mg every other week for 5 years. Among those, 86 patients (75.4%) had ACR 20 responses; 72 patients (63.2%) had ACR 50 responses; and 41 patients (36%) had ACR 70 responses. Of 207 patients, 81 patients continued on Humira 40 mg every other week for 10 years. Among those, 64 patients (79.0%) had ACR 20 responses; 56 patients (69.1%) had ACR 50 responses; and 43 patients (53.1%) had ACR 70 responses.In RA study IV, the ACR 20 response of patients treated with Humira plus standard of care was statistically significantly better than patients treated with placebo plus standard of care (p < 0.001). In RA studies I-IV, Humira-treated patients achieved statistically significant ACR 20 and 50 responses compared to placebo as early as one to two weeks after initiation of treatment.In RA study V with early rheumatoid arthritis patients who were methotrexate naïve, combination therapy with Humira and methotrexate led to faster and significantly greater ACR responses than methotrexate monotherapy and Humira monotherapy at Week 52 and responses were sustained at Week 104 (see Table 4).Table 4ACR Responses in RA Study V(percent of patients)| Response | MTXn=257 | Humiran=274 | Humira/MTXn=268 | p-valuea | p-valueb | p-valuec | | ACR 20
| | | | | | | | Week 52
| 62.6%
| 54.4%
| 72.8%
| 0.013
| < 0.001
| 0.043
| | Week 104
| 56.0%
| 49.3%
| 69.4%
| 0.002
| < 0.001
| 0.140
| | ACR 50
| | | | | | | | Week 52
| 45.9%
| 41.2%
| 61.6%
| < 0.001
| < 0.001
| 0.317
| | Week 104
| 42.8%
| 36.9%
| 59.0%
| < 0.001
| < 0.001
| 0.162
| | ACR 70
| | | | | | | | Week 52
| 27.2%
| 25.9%
| 45.5%
| < 0.001
| < 0.001
| 0.656
| | Week 104
| 28.4%
| 28.1%
| 46.6%
| < 0.001
| < 0.001
| 0.864
| | a. p-value is from the pairwise comparison of methotrexate monotherapy and Humira/methotrexate combination therapy using the Mann-Whitney U test.
b. p-value is from the pairwise comparison of Humira monotherapy and Humira/methotrexate combination therapy using the Mann-Whitney U test
c. p-value is from the pairwise comparison of Humira monotherapy and methotrexate monotherapy using the Mann-Whitney U test |
At Week 52, 42.9% of patients who received Humira/methotrexate combination therapy achieved clinical remission (DAS28 < 2.6) compared to 20.6% of patients receiving methotrexate monotherapy and 23.4% of patients receiving Humira monotherapy. Humira/methotrexate combination therapy was clinically and statistically superior to methotrexate (p < 0.001) and Humira monotherapy (p < 0.001) in achieving a low disease state in patients with recently diagnosed moderate to severe rheumatoid arthritis. The response for the two monotherapy arms was similar (p = 0.447).Radiographic responseIn RA study III, where Humira treated patients had a mean duration of rheumatoid arthritis of approximately 11 years, structural joint damage was assessed radiographically and expressed as change in modified Total Sharp Score (TSS) and its components, the erosion score and joint space narrowing score. Humira/methotrexate patients demonstrated significantly less radiographic progression than patients receiving methotrexate alone at 6 and 12 months (see Table 6). Data from the open-label extension phase indicate that the reduction in rate of progression of structural damage is maintained for8 and 10 years in a subset of patients. At 8 years, 81 of 207 patients originally treated with 40 mg Humira every other week were evaluated radiographically. Among those, 48 patients showed no progression of structural damage defined by a change from baseline in the mTSS of 0.5 or less. At 10 years, 79 of 207 patients originally treated with 40 mg Humira every other week were evaluated radiographically. Among those, 40 patients showed no progression of structural damage defined by a change from baseline in the mTSS of 0.5 or less.Table 5Radiographic Mean Changes Over 12 Months in RA Study III| | Placebo/MTXa | Humira/MTX 40 mg every other week
| Placebo/MTX-Humira/MTX (95% Confidence Intervalb)
| p-value
| | Total Sharp Score
| 2.7
| 0.1
| 2.6 (1.4, 3.8)
| < 0.001c | | Erosion score
| 1.6
| 0.0
| 1.6 (0.9, 2.2)
| < 0.001
| | JSNd
score
| 1.0
| 0.1
| 0.9 (0.3, 1.4)
| 0.002
| amethotrexateb95% confidence intervals for the differences in change scores between methotrexate and Humira. cBased on rank analysis dJoint Space NarrowingIn RA study V, structural joint damage was assessed radiographically and expressed as change in modified Total Sharp Score (see Table 6).Table 6 Radiographic Mean Changes at Week 52 in RA Study V| | MTX
n=257
(95% confidence interval)
| Humira
n=274
(95% confidence interval)
| Humira/MTX
n=268
(95% confidence interval)
| p-valuea | p-valueb | p-valuec | | Total Sharp Score
| 5.7 (4.2-7.3)
| 3.0 (1.7-4.3)
| 1.3 (0.5-2.1)
| < 0.001
| 0.0020
| < 0.001
| | Erosion score
| 3.7 (2.7-4.7)
| 1.7 (1.0-2.4)
| 0.8 (0.4-1.2)
| < 0.001
| 0.0082
| < 0.001
| | JSN score
| 2.0 (1.2-2.8)
| 1.3 (0.5-2.1)
| 0.5 (0-1.0)
| < 0.001
| 0.0037
| 0.151
| a
p-value is from the pairwise comparison of methotrexate monotherapy and Humira/methotrexate combination therapy using the Mann-Whitney U test.
b
p-value is from the pairwise comparison of Humira monotherapy and Humira/methotrexate combination therapy using the Mann-Whitney U test
c
p-value is from the pairwise comparison of Humira monotherapy and methotrexate monotherapy using the Mann-Whitney U testFollowing 52 weeks and 104 weeks of treatment, the percentage of patients without progression (change from baseline in modified Total Sharp Score ≤ 0.5) was significantly higher with Humira/methotrexate combination therapy (63.8% and 61.2% respectively) compared to methotrexate monotherapy (37.4% and 33.5% respectively, p < 0.001) and Humira monotherapy (50.7%, p < 0.002 and 44.5%, p < 0.001 respectively).Quality of life and physical functionHealth-related quality of life and physical function were assessed using the disability index of the Health Assessment Questionnaire (HAQ) in the four original adequate and well-controlled trials, which was a pre-specified primary endpoint at Week 52 in RA study III. All doses/schedules of Humira in all four studies showed statistically significantly greater improvement in the disability index of the HAQ from baseline to Month 6 compared to placebo and in RA study III the same was seen at Week 52. Results from the Short Form Health Survey (SF 36) for all doses/schedules of Humira in all four studies support these findings, with statistically significant physical component summary (PCS) scores, as well as statistically significant pain and vitality domain scores for the 40 mg every other week dose. A statistically significant decrease in fatigue as measured by functional assessment of chronic illness therapy (FACIT) scores was seen in all three studies in which it was assessed (RA studies I, III, IV).In RA study III, most subjects who achieved improvement in physical function and continued treatment maintained improvement through Week 520(120 months) of open-label treatment. Improvement in quality of life was measured up to Week 156 (36 months) and improvement was maintained through that time.In RA study V, the improvement in the HAQ disability index and the physical component of the SF 36 showed greater improvement (p < 0.001) for Humira/methotrexate combination therapy versus methotrexate monotherapy and Humira monotherapy at Week 52, which was maintained through Week 104.Polyarticular juvenile idiopathic arthritis (JIA) The safety and efficacy of Humira was assessed in two studies (JIA I and II) in children with active polyarticular or polyarticular course juvenile idiopathic arthritis, who had a variety of JIA onset types (most frequently rheumatoid-factor negative or positive polyarthritis and extended oligoarthritis).JIA IThe safety and efficacy of Humira were assessed in a multicentre, randomised, double-blind, parallel − group study in 171 children (4-17 years old) with polyarticular JIA. In the open-label lead in phase (OL LI) patients were stratified into two groups, MTX (methotrexate)-treated or non-MTX-treated. Patients who were in the non-MTX stratum were either naïve to or had been withdrawn from MTX at least two weeks prior to study drug administration. Patients remained on stable doses of NSAIDs and or prednisone (≤ 0.2 mg /kg/day or 10 mg/day maximum). In the OL LI phase all patients received 24 mg/m2 up to a maximum of 40 mg Humira every other week for 16 weeks. The distribution of patients by age and minimum, median and maximum dose received during the OL LI phase is presented in Table 7.Table 7.Distribution of patients by age and adalimumab dose received during the OL LI phase| Age Group
| Number of patients at Baseline n (%)
| Minimum, median and maximum dose
| | 4 to 7 years
| 31 (18.1)
| 10, 20 and 25 mg
| | 8 to 12 years
| 71 (41.5)
| 20, 25 and 40 mg
| | 13 to 17 years
| 69 (40.4)
| 25, 40 and 40 mg
| Patients demonstrating a Pediatric ACR 30 response at Week 16 were eligible to be randomised into the double blind (DB) phase and received either Humira 24 mg/m2 up to a maximum of 40 mg, or placebo every other week for an additional 32 weeks or until disease flare. Disease flare criteria were defined as a worsening of ≥ 30% from baseline in ≥ 3 of 6 Pediatric ACR core criteria, ≥ 2 active joints, and improvement of > 30% in no more than 1 of the 6 criteria. After 32 weeks or at disease flare, patients were eligible to enroll into the open label extension phase Table 8Ped ACR 30 Responses in the JIA study| Stratum
| MTX
| Without MTX
| | Phase
| | | | OL-LI 16 weeks
| | | | Ped ACR 30 response (n/N)
| 94.1% (80/85)
| 74.4% (64/86)
| | Efficacy Outcomes
| | Double Blind 32 week
| Humira /MTX
(N = 38)
| Placebo/ MTX
(N = 37)
| Humira
(N = 30)
| Placebo
(N = 28)
| | Disease flares at the end of 32 weeksa
(n/N)
| 36.8% (14/38)
| 64.9% (24/37)b | 43.3% (13/30)
| 71.4% (20/28)c | | Median time to disease flare
| >32 weeks
| 20 weeks
| >32 weeks
| 14 weeks
| a Ped ACR 30/50/70 responses Week 48 significantly greater than those of placebo treated patients b p = 0.015c p = 0.031Amongst those who responded at Week 16 (n=144), the Pediatric ACR 30/50/70/90 responses were maintained for up to six years in the OLE phase in patients who received Humira throughout the study. Over all 19 subjects, of which 11 of the baseline age group 4 to 12 and 8 of the baseline age group 13 to 17 years were treated 6 years or longer.Overall responses were generally better and, fewer patients developed antibodies when treated with the combination of Humira and MTX compared to Humira alone. Taking these results into consideration, Humira is recommended for use in combination with MTX and for use as monotherapy in patients for whom MTX use is not appropriate (see section 4.2).JIA IIThe safety and efficacy of Humira was assessed in an open-label, multicenter study in 32 children (2 - <4 years old or aged 4 and above weighing < 15 kg) with moderately to severely active polyarticular JIA. The patients received 24 mg/m2 body surface area (BSA) of Humira up to a maximum of 20 mg every other week as a single dose via SC injection for at least 24 weeks. During the study, most subjects used concomitant MTX, with fewer reporting use of corticosteroids or NSAIDs.At Week 12 and Week 24, PedACR30 response was 93.5% and 90.0%, respectively, using the observed data approach. The proportions of subjects with PedACR50/70/90 at Week 12 and Week 24 were 90.3%/61.3%/38.7% and 83.3%/73.3%/36.7%, respectively. Amongst those who responded (Pediatric ACR 30) at Week 24 (n=27 out of 30 patients), the Pediatric ACR 30 responses were maintained for up to 60 weeks in the OLE phase in patients who received Humira throughout this time period. Overall, 20 subjects were treated for 60 weeks or longer.Axial Spondyloarthritis Ankylosing spondylitis (AS)Humira 40 mg every other week was assessed in 393 patients in two randomised, 24 week double − blind, placebo − controlled studies in patients with active ankylosing spondylitis (mean baseline score of disease activity [Bath Ankylosing Spondylitis Disease Activity Index (BASDAI)] was 6.3 in all groups) who have had an inadequate response to conventional therapy. Seventy-nine (20.1%) patients were treated concomitantly with disease modifying anti − rheumatic drugs, and 37 (9.4%) patients with glucocorticoids. The blinded period was followed by an open − label period during which patients received Humira 40 mg every other week subcutaneously for up to an additional 28 weeks. Subjects (n=215, 54.7%) who failed to achieve ASAS 20 at Weeks 12, or 16 or 20 received early escape open-label adalimumab 40 mg every other week subcutaneously and were subsequently treated as non-responders in the double-blind statistical analyses.In the larger AS study I with 315 patients, results showed statistically significant improvement of the signs and symptoms of ankylosing spondylitis in patients treated with Humira compared to placebo. Significant response was first observed at Week 2 and maintained through 24 weeks (Table 9).Table 9 Efficacy Responses in Placebo-Controlled AS Study Study I Reduction of Signs and Symptoms | Response | PlaceboN=107 | HumiraN=208 | | ASASa
20
| | | | Week 2
| 16%
| 42%***
| | Week 12
| 21%
| 58%***
| | Week 24
| 19%
| 51%***
| | ASAS 50
| | | | Week 2
| 3%
| 16%***
| | Week 12
| 10%
| 38%***
| | Week 24
| 11%
| 35%***
| | ASAS 70
| | | | Week 2
| 0%
| 7%**
| | Week 12
| 5%
| 23%***
| | Week 24
| 8%
| 24%***
| | BASDAIb
50
| | | | Week 2
| 4%
| 20%***
| | Week 12
| 16%
| 45%***
| | Week 24
| 15%
| 42%***
| ***,** Statistically significant at p < 0.001, < 0.01 for all comparisons between Humira and placebo at Weeks 2, 12 and 24a ASsessments in Ankylosing Spondylitisb Bath Ankylosing Spondylitis Disease Activity IndexHumira treated patients had significantly greater improvement at Week 12 which was maintained through Week 24 in both the SF36 and Ankylosing Spondylitis Quality of Life Questionnaire (ASQoL).Similar trends (not all statistically significant) were seen in the smaller randomised, double − blind, placebo controlled AS study II of 82 adult patients with active ankylosing spondylitis.Axial spondyloarthritis without radiographic evidence of AS Humira 40mg every other week was assessed in 185 patients in one randomized, 12 week double - blind, placebo - controlled study in patients with active non-radiographic axial spondyloarthitis (mean baseline score of disease activity [Bath Ankylosing Spondylitis Disease Activity Index (BASDAI)] was 6.4 for patients treated with Humira and 6.5 for those on placebo) who have had an inadequate response to or intolerance to ≥ 1 NSAIDs, or a contraindication for NSAIDs.Thirty-three (18%) of patients were treated concomitantly with disease modifying anti-rheumatic drugs, and 145 (78%) patients with NSAIDs at baseline. The double-blind period was followed by an open-label period during which patients receive Humira 40 mg every other week subcutaneously for up to an additional 144 weeks. Week 12 results showed statistically significant improvement of the signs and symptoms of active non-radiographic axial spondyloarthritis in patients treated with Humira compared to placebo (Table 9).Table 10 Efficacy Response in Placebo-Controlled Axial SpA Study - Reduction of signs and symptoms | Double-BlindResponse at Week 12 | PlaceboN=94 | HumiraN=91 | | ASASa
40
| 15%
| 36%***
| | ASAS 20
| 31%
| 52%**
| | ASAS 5/6
| 6%
| 31%***
| | ASAS partial remission
| 5%
| 16%***
| | BASDAIb
50
| 15%
| 35%**
| a
ASAS = Assessments in Spondyloarthritis International Society
a
ASAS = Assessments in Spondyloarthritis International Society
b
Bath Ankylosing Spondylitis Disease Activity Index
***, **, * Statistically significant at p < 0.001, < 0.01, and
< 0.05, respectively, for all comparisons between Humira and placebo.Health-related quality of life and physical function were assessed using the HAQ-S and the SF-36 questionnaires. Humira showed statistically significantly greater improvement in the HAQ-S total score and the SF-36 Physical Component Score (PCS) from baseline to week 12 compared to placebo.Psoriatic arthritis Humira, 40 mg every other week, was studied in patients with moderately to severely active psoriatic arthritis in two placebo-controlled studies, PsA studies I and II. PsA study I with 24 week duration, treated 313 adult patients who had an inadequate response to non-steroidal anti-inflammatory drug therapy and of these, approximately 50% were taking methotrexate. PsA study II with 12-week duration, treated 100 patients who had an inadequate response to DMARD therapy. Upon completion of both studies, 383 patients enrolled in an open-label extension study, in which 40 mg Humira was administered eow.There is insufficient evidence of the efficacy of Humira in patients with ankylosing spondylitis-like psoriatic arthropathy due to the small number of patients studied. Table 11 ACR Response in Placebo-Controlled Psoriatic Arthritis Studies(Percent of Patients)| | PsA Study I
| PsA Study II
| | Response
| Placebo
N=162
| Humira
N=151
| Placebo
N=49
| Humira
N=51
| | ACR 20
| | | | | | Week 12
| 14%
| 58%*** | 16%
| 39%* | | Week 24
| 15%
| 57%*** | N/A
| N/A
| | ACR 50
| | | | | | Week 12
| 4%
| 36%*** | 2%
| 25%*** | | Week 24
| 6%
| 39%*** | N/A
| N/A
| | ACR 70
| | | | | | Week 12
| 1%
| 20%*** | 0%
| 14% * | | Week 24
| 1%
| 23%*** | N/A
| N/A
| *** p < 0.001 for all comparisons between Humira and placebo
* p < 0.05 for all comparisons between Humira and placebo
N/A not applicableACR responses in PsA study I were similar with and without concomitant methotrexate therapy.ACR responses were maintained in the open-label extension study for up to 136 weeks.Radiographic changes were assessed in the psoriatic arthritis studies. Radiographs of hands, wrists, and feet were obtained at baseline and Week 24 during the double-blind period when patients were on Humira or placebo and at Week 48 when all patients were on open-label Humira. A modified Total Sharp Score (mTSS), which included distal interphalangeal joints (i.e., not identical to the TSS used for rheumatoid arthritis), was used.Humira treatment reduced the rate of progression of peripheral joint damage compared with placebo treatment as measured by change from baseline in mTSS (mean ± SD) 0.8 ± 2.5 in the placebo group (at Week 24) compared with 0.0 ± 1.9; (p< 0.001) in the Humira group (at Week 48).In subjects treated with Humira with no radiographic progression from baseline to Week 48 (n=102), 84% continued to show no radiographic progression through 144 weeks of treatment.Humira treated patients demonstrated statistically significant improvement in physical function as assessed by HAQ and Short Form Health Survey (SF 36) compared to placebo at Week 24. Improved physical function continued during the open label extension up to Week 136.Psoriasis The safety and efficacy of Humira were studied in adult patients with chronic plaque psoriasis (≥ 10% BSA involvement and Psoriasis Area and Severity Index (PASI) ≥ 12 or ≥ 10) who were candidates for systemic therapy or phototherapy in randomised, double-blind studies. 73% of patients enrolled in Psoriasis Studies I and II had received prior systemic therapy or phototherapy.Psoriasis Study I (REVEAL) evaluated 1,212 patients within three treatment periods. In period A, patients received placebo or Humira at an initial dose of 80 mg followed by 40 mg every other week starting one week after the initial dose. After 16 weeks of therapy, patients who achieved at least a PASI 75 response (PASI score improvement of at least 75% relative to baseline), entered period B and received open-label 40 mg Humira every other week. Patients who maintained ≥PASI 75 response at Week 33 and were originally randomised to active therapy in Period A, were re-randomised in period C to receive 40 mg Humira every other week or placebo for an additional 19 weeks. Across all treatment groups, the mean baseline PASI score was 18.9 and the baseline Physician's Global Assessment (PGA) score ranged from moderate (53% of subjects included) to severe (41%) to very severe (6%).Psoriasis Study II (CHAMPION) compared the efficacy and safety of Humira versus methotrexate and placebo in 271 patients. Patients received placebo, an initial dose of MTX 7.5 mg and thereafter dose increases up to Week 12, with a maximum dose of 25 mg or an initial dose of 80 mg Humira followed by 40 mg every other week (starting one week after the initial dose) for 16 weeks. There are no data available comparing Humira and MTX beyond 16 weeks of therapy. Patients receiving MTX who achieved a ≥PASI 50 response at Week 8 and/or 12 did not receive further dose increases. Across all treatment groups, the mean baseline PASI score was 19.7 and the baseline PGA score ranged from mild (<1%) to moderate (48%) to severe (46%) to very severe (6%).Patients participating in all Phase 2 and Phase 3 psoriasis studies were eligible to enroll into an open-label extension trial, where Humira was given for at least an additional 108 weeks.In Psoriasis Studies I and II, a primary endpoint was the proportion of patients who achieved a PASI 75 response from baseline at Week 16 (see Tables 12 and 13).| Table 12Ps Study I (REVEAL) - Efficacy Results at 16 Weeks | | | PlaceboN=398n (%) | Humira 40 mg eowN=814n (%) | | ≥ PASI 75a | 26 (6.5)
| 578 (70.9)b | | PASI 100 | 3 (0.8)
| 163 (20.0)b | | PGA: Clear/minimal | 17 (4.3)
| 506 (62.2)b | | a
Percent of patients achieving PASI75 response was calculated as center-adjusted rate
b
p<0.001, Humira vs. placebo
| Table 13 Ps Study II (CHAMPION) Efficacy Results at 16 Weeks| | PlaceboN=53n (%) | MTXN=110n (%) | Humira 40 mg eowN=108n (%) | | ≥ PASI 75 | 10 (18.9)
| 39 (35.5)
| 86 (79.6) a, b | | PASI 100 | 1 (1.9)
| 8 (7.3)
| 18 (16.7) c, d | | PGA: Clear/minimal | 6 (11.3)
| 33 (30.0)
| 79 (73.1) a, b | | a
p<0.001 Humira vs. placebo
b
p<0.001 Humira vs. methotrexate
c
p<0.01 Humira vs. placebo
d
p<0.05 Humira vs. methotrexate
| In Psoriasis Study I, 28% of patients who were PASI 75 responders and were re-randomised to placebo at Week 33 compared to 5% continuing on Humira, p<0.001, experienced loss of adequate response (PASI score after Week 33 and on or before Week 52 that resulted in a <PASI 50 response relative to baseline with a minimum of a 6-point increase in PASI score relative to Week 33). Of the patients who lost adequate response after re-randomization to placebo who then enrolled into the open-label extension trial, 38% (25/66) and 55% (36/66) regained PASI 75 response after 12 and 24 weeks of re-treatment, respectively.A total of 233 PASI 75 responders at Week 16 and Week 33 received continuous Humira therapy for 52 weeks in Psoriasis Study I, and continued Humira in the open-label extension trial. PASI 75 and PGA of clear or minimal response rates in these patients were 74.7% and 59.0%, respectively, after an additional 108 weeks of open-label therapy (total of 160 weeks). In an analysis in which all patients who dropped out of the study for adverse events or lack of efficacy, or who dose-escalated, were considered non-responders, PASI 75 and PGA of clear or minimal response rates in these patients were 69.6% and 55.7%, respectively, after an additional 108 weeks of open-label therapy (total of 160 weeks).A total of 347 stable responders participated in a withdrawal and retreatment evaluation in an open-label extension study. During the withdrawal period, symptoms of psoriasis returned over time with a median time to relapse (decline to PGA moderate or worse) of approximately 5 months. None of these patients experienced rebound during the withdrawal period. A total of 76.5% (218/285) of patients who entered the retreatment period had a response of PGA clear or minimal after 16 weeks of retreatment, irrespective of whether they relapsed during withdrawal (69.1%[123/178] and 88.8% [95/107] for patients who relapsed and who did not relapse during the withdrawal period, respectively). A similar safety profile was observed during retreatment as before withdrawal.Significant improvements at Week 16 from baseline compared to placebo (Studies I and II) and MTX (Study II) were demonstrated in the DLQI (Dermatology Life Quality Index). In Study I, improvements in the physical and mental component summary scores of the SF-36 were also significant compared to placebo.In an open-label extension study, for patients who dose escalated from 40 mg every other week to 40 mg weekly due to a PASI response below 50% and were evaluated at 12 weeks after dose escalation, 93/349 (26.6%) of patients acheived PASI 75 response.Crohn's diseaseThe safety and efficacy of Humira were assessed in over 1500 patients with moderately to severely active Crohn's disease (Crohn's Disease Activity Index (CDAI) ≥ 220 and ≤ 450) in randomised, double-blind, placebo-controlled studies.Concomitant stable doses of aminosalicylates, corticosteroids, and/or immunomodulatory agents were permitted and 80% of patients continued to receive at least one of these medications. Induction of clinical remission (defined as CDAI < 150) was evaluated in two studies, CD Study I (CLASSIC I) and CD Study II (GAIN). In CD Study I, 299 TNF-antagonist naive patients were randomised to one of four treatment groups; placebo at Weeks 0 and 2, 160 mg Humira at Week 0 and 80 mg at Week 2, 80 mg at Week 0 and 40 mg at Week 2, and 40 mg at Week 0 and 20 mg at Week 2. In CD Study II, 325 patients who had lost response or were intolerant to infliximab were randomised to receive either 160 mg Humira at Week 0 and 80 mg at Week 2 or placebo at Weeks 0 and 2. The primary non-responders were excluded from the studies and therefore these patients were not further evaluated.Maintenance of clinical remission was evaluated in CD study III (CHARM). In CD Study III, 854 patients received open-label 80 mg at Week 0 and 40 mg at Week 2. At Week 4 patients were randomised to 40 mg every other Week, 40 mg every Week, or placebo with a total study duration of 56 Weeks. Patients in clinical response (decrease in CDAI ≥ 70) at Week 4 were stratified and analysed separately from those not in clinical response at Week 4. Corticosteroid taper was permitted after Week 8. CD study I and CD study II induction of remission and response rates are presented in Table 14.Table 14Induction of Clinical Remission and Response(Percent of Patients)| | CDStudy I: Infliximab Naive Patients | CD Study II: Infliximab Experienced Patients | | | PlaceboN=74 | Humira80/40 mgN = 75 | Humira 160/80 mg N=76 | PlaceboN=166 | Humira 160/80 mgN=159 | | Week 4
| | | | | | | Clinical remission
| 12%
| 24%
| 36%* | 7%
| 21%* | | Clinical response (CR-100)
| 24%
| 37%
| 49%** | 25%
| 38%** | | All p-values are pairwise comparisons of proportions for Humira versus
placebo
*
p < 0.001
**
p < 0.01
| Similar remission rates were observed for the 160/80 mg and 80/40 mg induction regimens by Week 8 and adverse events were more frequently noted in the 160/80 mg group.In CD Study III, at Week 4, 58% (499/854) of patients were in clinical response and were assessed in the primary analysis. Of those in clinical response at Week 4, 48% had been previously exposed to other TNF-antagonists. Maintenance of remission and response rates are presented in Table 15. Clinical remission results remained relatively constant irrespective of previous TNF-antagonist exposure.Disease-related hospitalisations and surgeries were statistically significantly reduced with adalimumab compared with placebo at Week 56.Table 15Maintenance of Clinical Remission and Response(Percent of Patients)| | Placebo | 40 mg Humira every other week
| 40 mg Humira every week
| | Week 26 | N=170 | N=172 | N=157 | | Clinical remission
| 17%
| 40%*
| 47%*
| | Clinical response (CR-100)
| 27%
| 52%*
| 52%*
| | Patients in steroid-free remission for >=90 daysa | 3% (2/66)
| 19% (11/58)**
| 15% (11/74)**
| | Week 56 | N=170 | N=172 | N=157 | | Clinical remission
| 12%
| 36%*
| 41%*
| | Clinical response (CR-100)
| 17%
| 41%*
| 48%*
| | Patients in steroid-free remission for >=90 daysa | 5% (3/66)
| 29% (17/58)*
| 20% (15/74)**
| | * p < 0.001 for Humira versus
placebo pairwise comparisons of proportions
** p < 0.02 for Humira versus
placebo pairwise comparisons of proportions
a
Of those receiving corticosteroids at baseline
| Among patients who were not in response at Week 4, 43% of Humira maintenance patients responded by Week 12 compared to 30% of placebo maintenance patients. These results suggest that some patients who have not responded by Week 4 benefit from continued maintenance therapy through Week 12. Therapy continued beyond 12 Weeks did not result in significantly more responses (see section 4.2). 117/276 patients from CD study I and 272/777 patients from CD studies II and III were followed through at least 3 years of open-label adalimumab therapy. 88 and 189 paients, respectively, continued to be in clinical remission. Clinical response (CR-100) was maintained in 102 and 233 patients, respectively. Quality of LifeIn CD Study I and CD Study II, statistically significant improvement in the disease-specific inflammatory bowel disease questionnaire (IBDQ) total score was achieved at Week 4 in patients randomised to Humira 80/40 mg and 160/80 mg compared to placebo and was seen at Weeks 26 and 56 in CD Study III as well among the adalimumab treatment groups compared to the placebo group.Paediatric Crohn's disease Humira was assessed in a multicenter, randomized, double-blind clinical trial designed to evaluate the efficacy and safety of induction and maintenance treatment with doses dependent on body weight (< 40 kg or ≥ 40 kg) in 192 paediatric subjects between the ages of 6 and 17 (inclusive) years, with moderate to severe Crohn´s disease (CD) defined as Paediatric Crohn's Disease Activity Index (PCDAI) score > 30. Subjects had to have failed conventional therapy (including a corticosteroid and/or an immunomodulator) for CD. Subjects may also have previously lost response or been intolerant to infliximab. All subjects received open-label induction therapy at a dose based on their Baseline body weight: 160 mg at Week 0 and 80 mg at Week 2 for subjects ≥ 40 kg, and 80 mg and 40 mg, respectively, for subjects < 40 kg.At Week 4, subjects were randomized 1:1 based on their body weight at the time to either the Low Dose or Standard Dose maintenance regimens as shown in Table 16.| Table 16Maintenance regimen | | Patient Weight | Low dose | Standard dose | | < 40 kg
| 10 mg eow
| 20 mg eow
| | ≥ 40 kg
| 20 mg eow
| 40 mg eow
|
Efficacy Results The primary endpoint of the study was clinical remission at Week 26, defined as PCDAI score ≤ 10.Clinical remission and clinical response (defined as reduction in PCDAI score of at least 15 points from Baseline) rates are presented in Table 17. Rates of discontinuation of corticosteroids or immunomodulators are presented in Table 18.| Table 17Paediatric CD StudyPCDAI Clinical Remission and Response | | | Standard Dose40/20 mg eow N = 93 | Low Dose20/10 mg eow N = 95 | P value*
| | Week 26 | | | | | Clinical remission
| 38.7%
| 28.4%
| 0.075
| | Clinical response
| 59.1%
| 48.4%
| 0.073
| | Week 52 | | | | | Clinical remission
| 33.3%
| 23.2%
| 0.100
| | Clinical response
| 41.9%
| 28.4%
| 0.038
| | * p value for Standard Dose versus
Low Dose comparison.
|
| Table 18Paediatric CD StudyDiscontinuation of Corticosteroids or Immunomodulators and Fistula Remission | | | Standard Dose40/20 mg eow | Low Dose20/10 mg eow | P value1 | | Discontinued corticosteroids | N= 33 | N=38 | | | Week 26
| 84.8%
| 65.8%
| 0.066
| | Week 52
| 69.7%
| 60.5%
| 0.420
| | Discontinuation of Immunomodulators2 | N=60 | N=57 | | | Week 52
| 30.0%
| 29.8%
| 0.983
| | Fistula remission3 | N=15 | N=21 | | | Week 26
| 46.7%
| 38.1%
| 0.608
| | Week 52
| 40.0%
| 23.8%
| 0.303
| | 1
p value for Standard Dose versus
Low Dose comparison.
2
Immunosuppressant therapy could only be discontinued at or after Week 26 at the investigator's discretion if the subject met the clinical response criterion
3
defined as a closure of all fistulas that were draining at Baseline for at least 2 consecutive post-Baseline visits
| Statistically significant increases (improvement) from Baseline to Week 26 and 52 in Body Mass Index and height velocity were observed for both treatment groups.Statistically and clinically significant improvements from Baseline were also observed in both treatment groups for quality of life parameters (including IMPACT III).Ulcerative Colitis The safety and efficacy of multiple doses of Humira were assessed in adult patients with moderately to severely active ulcerative colitis (Mayo score 6 to 12 with endoscopy subscore of 2 to 3) in randomised, double-blind, placebo-controlled studies. In Study UC-I, 390 TNF-antagonist naïve patients were randomised to receive either placebo at Weeks 0 and 2, 160 mg Humira at Week 0 followed by 80 mg at Week 2, or 80 mg Humira at Week 0 followed by 40 mg at Week 2. After Week 2, patients in both adalimumab arms received 40 mg eow. Clinical remission (defined as Mayo score ≤ 2 with no subscore > 1) was assessed at Week 8. In study UC-II, 248 patients received 160 mg of Humira at Week 0, 80 mg at Week 2 and 40 mg eow thereafter, and 246 patients received placebo. Clinical results were assessed for induction of remission at Week 8 and for maintenance of remission at Week 52. Subjects induced with 160/80 mg Humira achieved clinical remission versus placebo at Week 8 in statistically significantly greater percentages in study UC-I (18% vs. 9% respectively, p=0.031) and study UC-II (17% vs. 9% respectively, p=0.019). In study UC-II, among those treated with Humira who were in remission at Week 8, 21/41 (51%) were in remission at Week 52.Results from the overall UC-II study population are shown in Table 19.Table19 Response, Remission and Mucosal Healing in Study UC-II (Percent of Patients) | | Placebo | HUMIRA 40 mg
every other week | | Week 52
| N=246 | N=248 | | Clinical Response
| 18%
| 30%*
| | Clinical Remission
| 9%
| 17%*
| | Mucosal Healing
| 15%
| 25%*
| | Steroid-free remission for ≥ 90 days a | 6%
(N=140)
| 13% *
(N=150)
| | Week 8 and 52
| | | | Sustained Response
| 12%
| 24%**
| | Sustained Remission
| 4%
| 8%*
| | Sustained Mucosal Healing
| 11%
| 19%*
| | Clinical remission is Mayo score ≤ 2 with no subscore > 1;
*
p<0.05 for HUMIRA vs. placebo pairwise comparison of proportions
**p<0.001 for HUMIRA vs.
placebo pairwise comparison of proportions
a
Of those receiving corticosteroids at baseline | Approximately 40% of patients in study UC-II had failed prior anti-TNF treatment with infliximab. The efficacy of adalimumab in those patients was reduced compared to that in anti-TNF naïve patients. Among patients who had failed prior anti-TNF treatment, Week 52 remission was achieved by 3% on placebo and 10% on adalimumab.Patients from UC studies I and II had the option to roll over into an open-label long-term extension study. Patients, who lost response after one year of treatment or beyond, could benefit from an increase of dosing frequency to 40 mg weekly (see 4.2). ImmunogenicityFormation of anti-adalimumab antibodies is associated with increased clearance and reduced efficacy of adalimumab. There is no apparent correlation between the presence of anti-adalimumab antibodies and the occurrence of adverse events.Patients in RA Studies I, II and III were tested at multiple time points for anti-adalimumab antibodies during the 6 to 12 month period. In the pivotal trials, anti-adalimumab antibodies were identified in 58/1053 (5.5%) patients treated with adalimumab, compared to 2/370 (0.5%) on placebo. In patients not given concomitant methotrexate, the incidence was 12.4%, compared to 0.6% when adalimumab was used as add-on to methotrexate. In patients with polyarticular juvenile idiopathic arthritis, adalimumab antibodies were identified in 27/171 subjects (15.8%) treated with adalimumab. In patients not given concomitant methotrexate, the incidence was 22/86 (25.6%), compared to 5/85 (5.9%) when adalimumab was used as add-on to methotrexate.In patients with psoriatic arthritis, anti-adalimumab antibodies were identified in 38/376 subjects (10%) treated with adalimumab. In patients not given concomitant methotrexate, the incidence was 13.5% (24/178 subjects), compared to 7% (14 of 198 subjects) when adalimumab was used as add-on to methotrexate.In patients with ankylosing spondylitis anti-adalimumab antibodies were identified in 17/204 subjects (8.3%) treated with adalimumab. In patients not given concomitant methotrexate, the incidence was 16/185 (8.6%), compared to 1/19 (5.3%) when adalimumab was used as add-on to methotrexate.In patients with Crohn's disease, anti-adalimumab antibodies were identified in 7/269 subjects (2.6%) and in 19/487 subjects (3.9%) with ulcerative colitis.In patients with psoriasis, anti-adalimumab antibodies were identified in 77/920 subjects (8.4%) treated with adalimumab monotherapy.In plaque psoriasis patients on long term adalimumab monotherapy who participated in a withdrawal and retreatment study, the rate of antibodies to adalimumab after retreatment (11 of 482 subjects, 2.3%) was similar to the rate observed prior to withdrawal (11 of 590 subjects, 1.9%).Because immunogenicity analyses are product-specific, comparison of antibody rates with those from other products is not appropriate.Paediatric population The European Medicines Agency has waived the obligation to submit the results of studies with Humira in all subsets of the paediatric population rheumatoid arthritis, psoriatic arthritis and ankylosing spondylitis, see section 4.2 for information on paediatric use.The European Medicines Agency has deferred the obligation to submit the results of the studies with Humira in one or more subsets of the paediatric population ulcerative colitis, see section 4.2 for information on paediatric use.
| |