Pharmacotherapeutic group: analgesics, calcitonin gene-related peptide (CGRP) antagonists. ATCcode: N02CD03.
Mechanism of actionFremanezumab is a humanised IgG2Δa/kappa monoclonal antibody derived from a murine precursor.
Fremanezumab selectively binds the calcitonin gene-related peptide (CGRP) ligand and blocks both
CGRP isoforms (α-and β-CGRP) from binding to the CGRP receptor. While the precise mechanism ofaction by which fremanezumab prevents migraine attacks is unknown, it is believed that prevention ofmigraine is obtained by its effect modulating the trigeminal system. CGRP levels have been shown toincrease significantly during migraine and return to normal with headache relief.
Fremanezumab is highly specific for CGRP and does not bind to closely related family members (e.g.,amylin, calcitonin, intermedin and adrenomedullin).
Clinical efficacy and safetyThe efficacy of fremanezumab was assessed in two randomised, 12-week, double-blind, placebo-controlled phase III studies in adult patients with episodic (Study 1) and chronic migraine (Study 2).
The patients enrolled had at least a 12-month history of migraine (with and without aura) according tothe International Classification of Headache Disorders (ICHD-III) diagnostic criteria. Elderly patients(>70 years), patients using opioids or barbiturates on more than 4 days per month, and patients withpre-existing myocardial infarction, cerebrovascular accident, and thromboembolic events wereexcluded.
Episodic migraine study (Study 1)
The efficacy of fremanezumab was evaluated in episodic migraine in a randomised, multicentre,12-week, placebo-controlled, double-blind study (Study 1). Adults with a history of episodic migraine(less than 15 headache days per month) were included in the study. A total of 875 patients(742 females, 133 males) were randomised into one of three arms: 675 mg fremanezumab every threemonths (quarterly, n=291), 225 mg fremanezumab once a month (monthly, n=290), or monthlyadministration of placebo (n=294) administered via subcutaneous injection. Demographics andbaseline disease characteristics were balanced and comparable between the study arms. Patients had amedian age of 42 years (range: 18 to 70 years), 85% were female, and 80% were white. The meanmigraine frequency at baseline was approximately 9 migraine days per month. Patients were allowedto use acute headache treatments during the study. A sub-set of patients (21%) was also allowed to useone commonly used concomitant, preventive medicinal product (beta-blockers, calcium channelblocker/benzocycloheptene, antidepressants, anticonvulsants). Overall, 19% of the patients hadpreviously used topiramate. A total of 791 patients completed the 12-week double-blind treatmentperiod.
The primary efficacy endpoint was the mean change from baseline in the monthly average number ofmigraine days during the 12-week treatment period. Key secondary endpoints were the achievement ofat least 50% reduction from baseline in monthly migraine days (50% responder rate), mean changefrom baseline in the patient reported MIDAS score, and change from baseline in monthly averagenumber of days of acute headache medicinal product use. Both monthly and quarterly dosing regimensof fremanezumab demonstrated statistically significant and clinically meaningful improvement frombaseline compared to placebo for key endpoints (see Table 2). The effect also occurred from as earlyas the first month and sustained over the treatment period (see Figure 1).
Figure 1: Mean Change from Baseline in the Monthly Average Number of Migraine Days for
Study 1
Placebo AJOVY Quarterly AJOVY Monthly0.0
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Visit: Baseline Week 1 Week 2 Week 3 Month 1 Month 2 Month 3
AJOVY Monthly <0.0001 <0.0001 <0.0001 <0.0001 <0.0001 0.0002
AJOVY Quarterly <0.0001 <0.0001 0.0003 <0.0001 0.0009 0.0013
Mean at baseline (monthly average number of migraine days): Placebo: 9.1, AJOVY Quarterly: 9.2, AJOVY
Monthly: 8.9.
Table 2: Key Efficacy Outcomes in Study 1 in Episodic Migraine
Efficacy Endpoint Placebo Fremanezumab Fremanezumab(n=290) 675 mg quarterly 225 mg monthly(n=288) (n=287)
MMD
Mean changea (95% -2.2 (-2.68, -1.71) -3.4 (-3.94, -2.96) -3.7 (-4.15, -3.18)
CI) - -1.2 (-1.74, -0.69) -1.4 (-1.96, -0.90)
TD (95% CI)b 9.1 (2.65) 9.2 (2.62) 8.9 (2.63)
Baseline (SD)
P-value (vs. placebo)a - p<0.0001 p<0.0001
MHD
Mean changea (95% -1.5 (-1.88, -1.06) -3.0 (-3.39, -2.55) -2.9 (-3.34, -2.51)
CI) - -1.5 (-1.95, -1.02) -1.5 (-1.92, -0.99)
TD (95% CI)b 6.9 (3.13) 7.2 (3.14) 6.8 (2.90)
Baseline (SD)
P-value (vs. placebo)a - p<0.0001 p<0.000150% Responder Rate
MMD
Percentage [%] 27.9% 44.4% 47.7%
P-value (vs. placebo) - p<0.0001 p<0.000175% Responder Rate
MMD
Percentage [%] 9.7% 18.4% 18.5%
P-value (vs. placebo) - p=0.0025 p=0.0023
MIDAS total
Mean changea (95% -17.5 (-20.62, -14.47) -23.0 (-26.10, -19.82) -24.6 (-27.68, -21.45)
CI) 37.3 (27.75) 41.7 (33.09) 38 (33.30)
Baseline (SD)
P-value (vs. placebo)a - p=0.0023 p<0.0001
MAHMD
Mean changea (95% -1.6 (-2.04, -1.20) -2.9 (-3.34, -2.48) -3.0 (-3.41, -2.56)
CI) - -1.3 (-1.73, -0.78) -1.3 (-1.81, -0.86)
LS Mean (+/- SE) Change from Baseline
TD (95% CI)b 7.7 (3.60) 7.7 (3.70) 7.7 (3.37)
Baseline (SD)
P-value (vs. placebo)a - p<0.0001 p<0.0001
CI = confidence interval; MAHMD = monthly acute headache medicinal products days; MHD = monthlyheadache days of at least moderate severity; MIDAS = Migraine Disability Assessment; MMD = monthlymigraine days; SD = standard deviation; TD = treatment differencea For all endpoints mean change and CIs are based on the ANCOVA model that included treatment, gender,region, and baseline preventive medication use (yes/no) as fixed effects and corresponding baseline value andyears since onset of migraine as covariates.b Treatment difference is based on the MMRM analysis with treatment, gender, region, and baseline preventivemedication use (yes/no), month, and treatment month as fixed effects and corresponding baseline value and yearssince onset of migraine as covariates.
In patients on one other concomitant, migraine preventive medicinal product, the treatment differencefor the reduction of monthly migraine days (MMD) observed between fremanezumab 675 mgquarterly and placebo was -1.8 days (95% CI: -2.95, -0.55) and between fremanezumab 225 mgmonthly and placebo -2.0 days (95% CI: -3.21, -0.86).
In patients who had previously used topiramate the treatment difference for the reduction of monthlymigraine days (MMD) observed between fremanezumab 675 mg quarterly and placebo was -2.3 days(95% CI: -3.64, -1.00) and between fremanezumab 225 mg monthly and placebo -2.4 days(95% CI: -3.61, -1.13).
Chronic migraine study (Study 2)
Fremanezumab was evaluated in chronic migraine in a randomised, multicentre, 12-week, placebo-controlled, double-blind study (Study 2). The study population included adults with a history ofchronic migraine (15 headache days or higher per month). A total of 1,130 patients (991 females,139 males) were randomised into one of three arms: 675 mg fremanezumab starting dose followed by225 mg fremanezumab once a month (monthly, n=379), 675 mg fremanezumab every three months(quarterly, n=376), or monthly administration of placebo (n=375) administered via subcutaneousinjection. Demographics and baseline disease characteristics were balanced and comparable betweenthe study arms. Patients had a median age of 41 years (range: 18 to 70 years), 88% were female, and79% were white. The mean headache frequency at baseline was approximately 21 headache days permonth (of which 13 headache days were of at least moderate severity). Patients were allowed to useacute headache treatments during the study. A sub-set of patients (21%) was also allowed to use onecommonly used concomitant, preventive medicinal product (beta-blockers, calcium channelblocker/benzocycloheptene, antidepressants, anticonvulsants). Overall, 30% of the patients hadpreviously used topiramate and 15% onabotulinumtoxin A. A total of 1,034 patients completed the12-week double-blind treatment period.
The primary efficacy endpoint was the mean change from baseline in the monthly average number ofheadache days of at least moderate severity during the 12-week treatment period. Key secondaryendpoints were the achievement of at least 50% reduction from baseline in monthly headache days ofat least moderate severity (50% responder rate), mean change from baseline in the patient reported
HIT-6 score, and change from baseline in monthly average number of days of acute headachemedicinal product use. Both monthly and quarterly dosing regimens of fremanezumab demonstratedstatistically significant and clinically meaningful improvement from baseline compared to placebo forkey endpoints (see Table 3). The effect also occurred from as early as the first month and sustainedover the treatment period (see Figure 2).
Figure 2: Mean Change from Baseline in the Monthly Average Number of Headache Days of At
Least Moderate Severity for Study 2
Placebo AJOVY Quarterly AJOVY Monthly0.0
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Visit: Baseline Week 1 Week 2 Week 3 Month 1 Month 2 Month 3
AJOVY Monthly <0.0001 <0.0001 <0.0001 <0.0001 <0.0001 <0.0001
AJOVY Quarterly <0.0001 <0.0001 <0.0001 <0.0001 <0.0001 0.0007
Mean at baseline (monthly average number of headache days of at least moderate severity): Placebo: 13.3,
AJOVY Quarterly: 13.2, AJOVY Monthly: 12.8.
Table 3: Key Efficacy Outcomes in Study 2 in Chronic Migraine
Efficacy Endpoint Placebo Fremanezumab Fremanezumab(n=371) 675 mg quarterly 225 mg monthly with(n=375) 675 mg starting dose(n=375)
MHD
Mean changea (95% -2.5 (-3.06, -1.85) -4.3 (-4.87, -3.66) -4.6 (-5.16, -3.97)
CI) - -1.8 (-2.45, -1.13) -2.1 (-2.77, -1.46)
TD (95% CI)b 13.3 (5.80) 13.2 (5.45) 12.8 (5.79)
Baseline (SD)
P-value (vs. placebo)a - p<0.0001 p<0.0001
MMD
Mean changea (95% -3.2 (-3.86, -2.47) -4.9 (-5.59, -4.20) -5.0 (-5.70, -4.33)
CI) - -1.7 (-2.44, -0.92) -1.9 (-2.61, -1.09)
TD (95% CI)b 16.3 (5.13) 16.2 (4.87) 16.0 (5.20)
Baseline (SD)
P-value (vs. placebo)a - p<0.0001 p<0.000150% Responder Rate
MHD
Percentage [%] 18.1% 37.6% 40.8%
P-value (vs. placebo) - p<0.0001 p<0.000175% Responder Rate
MHD
Percentage [%] 7.0% 14.7% 15.2%
P-value (vs. placebo) - p=0.0008 p=0.0003
HIT-6 total
Mean changea (95% -4.5 (-5.38, -3.60) -6.4 (-7.31, -5.52) -6.7 (-7.71, -5.97)
CI) 64.1 (4.79) 64.3 (4.75) 64.6 (4.43)
Baseline (SD)
P-value (vs. placebo)a - p=0.0001 p<0.0001
MAHMD
Mean changea (95% -1.9 (-2.48, -1.28) -3.7 (-4.25, -3.06) -4.2 (-4.79, -3.61)
CI) - -1.7 (-2.40, -1.09) -2.3 (-2.95, -1.64)
LS Mean (+/- SE) Change from Baseline
TD (95% CI)b 13.0 (6.89) 13.1 (6.79) 13.1 (7.22)
Baseline (SD)
P-value (vs. placebo)a - p<0.0001 p<0.0001
CI = confidence interval; HIT-6 = Headache Impact Test; MAHMD = monthly acute headache medication days;
MHD = monthly headache days of at least moderate severity; MMD = monthly migraine days; SD = standarddeviation; TD = treatment differencea For all endpoints mean change and CIs are based on the ANCOVA model that included treatment, gender,region, and baseline preventive medication use (yes/no) as fixed effects and corresponding baseline value andyears since onset of migraine as covariates.b Treatment difference is based on the MMRM analysis with treatment, gender, region, and baseline preventivemedication use (yes/no), month, and treatment month as fixed effects and corresponding baseline value and yearssince onset of migraine as covariates.
In patients on one other concomitant, migraine preventive medicinal product, the treatment differencefor the reduction of monthly headache days (MHD) of at least moderate severity observed betweenfremanezumab 675 mg quarterly and placebo was -1.3 days (95% CI: -2.66, 0.03) and betweenfremanezumab 225 mg monthly with 675 mg starting dose and placebo -2.0 days(95% CI: -3.27, -0.67).
In patients who had previously used topiramate the treatment difference for the reduction of monthlyheadache days (MHD) of at least moderate severity observed between fremanezumab 675 mgquarterly and placebo was -2.7 days (95% CI: -3.88, -1.51) and between fremanezumab 225 mgmonthly with 675 mg starting dose and placebo -2.9 days (95% CI: -4.10, -1.78). In patients who hadpreviously used onabotulinumtoxin A the treatment difference for the reduction of monthly headachedays (MHD) of at least moderate severity observed between fremanezumab 675 mg quarterly andplacebo was -1.3 days (95% CI: -3.01, -0.37) and between fremanezumab 225 mg monthly with675 mg starting dose and placebo -2.0 days (95% CI: -3.84, -0.22).
Approximately 52% of the patients in the study had acute headache medication overuse. The observedtreatment difference for the reduction of monthly headache days (MHD) of at least moderate severitybetween fremanezumab 675 mg quarterly and placebo in these patients was -2.2 days (95% CI: -3.14,
- 1.22) and between fremanezumab 225 mg monthly with 675 mg starting dose and placebo -2.7 days(95% CI: -3.71, -1.78).
Long-term study (Study 3)
For all episodic and chronic migraine patients, efficacy was sustained for up to 12 additional months inthe long-term study (Study 3), in which patients received 225 mg fremanezumab monthly or 675 mgquarterly. 79% of patients completed the 12-month treatment period of Study 3. Pooled across the twodosing regimens, a reduction of 6.6 monthly migraine days was observed after 15 months relative to
Study 1 and Study 2 baseline. 61% of patients completing Study 3 achieved a 50% response in the lastmonth of the study. No safety signal was observed during the 15-month combined treatment period.
Intrinsic and extrinsic factors
The efficacy and safety of fremanezumab was demonstrated regardless of age, gender, race, use ofconcomitant preventive medicinal products (beta-blockers, calcium channelblocker/benzocycloheptene, antidepressants, anticonvulsants), use of topiramate oronabotulinumtoxin A for migraine in the past, and acute headache medication overuse.
There is limited data available on the use of fremanezumab in patients ≥65 years of age (2% of thepatients).
Difficult to treat migraine
The efficacy and safety of fremanezumab in a total of 838 episodic and chronic migraine patients withdocumented inadequate response to two to four classes of prior migraine preventive medicinalproducts was assessed in a randomised study (Study 4), which was composed of a 12-week double-blind, placebo-controlled treatment period followed by a 12-week open-label period.
The primary efficacy endpoint was the mean change from baseline in the monthly average number ofmigraine days during the 12-week double-blind treatment period. Key secondary endpoints were theachievement of at least 50% reduction from baseline in monthly migraine days, the mean change frombaseline in the monthly average number of headache days of at least moderate severity and changefrom baseline in monthly average number of days of acute headache medicinal product use. Bothmonthly and quarterly dosing regimens of fremanezumab demonstrated statistically significant andclinically meaningful improvement from baseline compared to placebo for key endpoints. Therefore,the results of Study 4 are consistent with the main findings of the previous efficacy studies and inaddition demonstrate efficacy in difficult to treat migraine, including mean reduction in monthlymigraine days (MMD) of -3.7 (95% CI: -4.38, -3.05) with fremanezumab quarterly and -4.1 (95% CI:
- 4.73, -3.41) with fremanezumab monthly compared to -0.6 (95% CI: -1.25, 0.07) in placebo-treatedpatients. 34% of the patients treated with fremanezumab quarterly and 34% of the patients treated withfremanezumab monthly achieved at least 50% reduction in MMD, compared to 9% in placebo-treatedpatients (p<0.0001) during the 12-week treatment period. The effect also occurred from as early as thefirst month and was sustained over the treatment period (see Figure 3). No safety signal was observedduring the 6-month treatment period.
Figure 3: Mean Change from Baseline in Monthly Average Number of Migraine Days for
Study 4
Placebo AJOVY Quarterly AJOVY Monthly0.0
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Visit: Baseline Month 1 Month 2 Month 3
AJOVY Monthly <0.0001 <0.0001 <0.0001
AJOVY Quarterly <0.0001 <0.0001 <0.0001
Mean at baseline (monthly average number of migraine days): Placebo: 14.4, AJOVY Quarterly: 14.1, AJOVY
Monthly: 14.1.
Paediatric populationThe European Medicines Agency has deferred the obligation to submit the results of studies with
AJOVY in one or more subsets of the paediatric population in prevention of migraine headaches (seesection 4.2 for information on paediatric use).