Pharmacotherapeutic group: Ophthalmologicals/Other ocular vascular disorder agents.
ATC code: S01LA09.
Pharmacology: Pharmacodynamics: Mechanism of Action: Faricimab is a humanized bispecific immunoglobulin G1 (IgG1) antibody that acts through inhibition of two distinct pathways by neutralization of both Ang-2 and vascular endothelial growth factor A (VEGF-A). Ang-2 causes vascular instability by promoting endothelial destabilization, pericyte loss, and pathological angiogenesis, thus potentiating vascular leakage and inflammation. It also sensitizes blood vessels to the activity of VEGF-A resulting in further vascular destabilization. Ang-2 and VEGF-A synergistically increase vascular permeability and stimulate neovascularization. By dual inhibition of Ang-2 and VEGF-A, faricimab reduces vascular permeability and inflammation, inhibits pathological angiogenesis and restores vascular stability.
Pharmacodynamics: In the six phase III studies described in the following, a suppression in the median ocular concentrations of free Ang-2 and free VEGF-A was detected from Day 7 compared to baseline.
nAMD: Similar reductions in the mean thickness of the central region of the fovea (central subfield thickness, CST) to those for aflibercept were observed from baseline through week 48 with Faricimab (Vabysmo). The mean CST reduction from baseline to the primary endpoint visits (mean at weeks 40, 44 and 48) was -137 μm and -137 μm for Faricimab (Vabysmo) dosed at intervals of 8 weeks (q8w), 12 weeks (q12w) or 16 weeks (q16w) versus -129 μm and -131 μm with the use of aflibercept in the TENAYA and LUCERNE studies, respectively. These mean CST reductions were maintained throughout year 2. Faricimab (Vabysmo) and aflibercept had a comparable effect on the reduction of intraretinal fluid (IRF), subretinal fluid (SRF), and pigment epithelial detachment (PED). At the primary endpoint visits, the proportion of patients in the TENAYA and LUCERNE studies, respectively, without IRF was 76%-82% and 78%-85 % under treatment with Faricimab (Vabysmo) vs. 74%-85% and 78%-84% under treatment with aflibercept. The percentage of patients without SRF in the two studies was 70%-79% and 66%-78% under treatment with Faricimab (Vabysmo) vs. 66%-78% and 62%-76% under treatment with aflibercept. The percentage of patients without PED in the two studies was 3%-8% and 3%-6% under treatment with Faricimab (Vabysmo) vs. 8%-10% and 7%-9% under treatment with aflibercept. These reductions in IRF, SRF and PED were maintained in year 2 (weeks 104-108).
Comparable changes from baseline in the total area of lesions due to choroidal neovascularisation (CNV) and comparable reductions in CNV leakage area with excretion of blood and fluid were observed in both studies for patients under treatment with Faricimab (Vabysmo) and aflibercept at week 48.
DME: Reductions in mean CST from baseline observed in both the YOSEMITE study and the RHINE study were numerically greater in patients treated with Faricimab (Vabysmo) every 8 weeks (q8w) and Faricimab (Vabysmo) up to q16w adjustable dosing as compared to aflibercept q8w from week 4 to week 100. Greater proportions of patients in both Faricimab (Vabysmo) arms achieved absence of IRF and absence of DME (defined as reaching CST below 325 μm on OCT) over time in both studies, compared to the aflibercept arm. Comparable reductions in SRF were observed across the respective Faricimab (Vabysmo) and aflibercept treatment arms over time in both studies. The mean reduction of CST from baseline to the primary endpoint visits (averaged at weeks 48, 52 and 56) in the YOSEMITE study was 207 μm and 197 μm in patients treated with Faricimab (Vabysmo) q8w and Faricimab (Vabysmo) up to q16w adjustable dosing compared to 170 μm in patients treated with aflibercept q8w; results were 196 μm, 188 μm and 170 μm, respectively in the RHINE study. These mean CST reductions were maintained through year 2. The proportions of patients with absence of DME at primary endpoint visits (min-max) in the YOSEMITE study were 77%-87% and 80%-82% in patients treated with Faricimab (Vabysmo) q8w and Faricimab (Vabysmo) up to q16w adjustable dosing, respectively, as compared to 64%-71% in patients treated with aflibercept q8w; results were 85%-90%, 83%-87%, and 71%-77%, respectively in the RHINE study. These results were maintained through year 2.
In the YOSEMITE study, the proportions of patients with absence of IRF at primary endpoint visits (averaged at weeks 48, 52 and 56) were 42%-48% and 34%-43% in patients treated with Faricimab (Vabysmo) q8w and Faricimab (Vabysmo) up to q16w adjustable dosing, respectively, as compared to 22%-25% in patients treated with aflibercept q8w; results were 39%-43%, 33%-41%, and 23%-29%, respectively in the RHINE study. These results were maintained through year 2.
BRVO and CRVO: In phase III studies in patients with branch retinal vein occlusion (BRVO; BALATON) and central/hemiretinal vein occlusion (C/HRVO; COMINO), reductions in mean CST were observed from baseline to week 24 with Faricimab (Vabysmo) every 4 weeks (q4w) and were comparable to those seen with aflibercept q4w. The mean CST reduction from baseline to week 24 was 311.4 μm for Faricimab (Vabysmo) q4w versus 304.4 μm for aflibercept q4w, and 461.6 μm for Faricimab (Vabysmo) q4w versus 448.8 μm for aflibercept q4w, in BALATON and COMINO, respectively. CST reductions were maintained through week 72 when patients moved to a Vabysmo up to q16w adjustable dosing regimen.
Comparable proportions of patients in both Faricimab (Vabysmo) and aflibercept arms achieved absence of IRF, absence of SRF and absence of macular edema (defined as reaching CST below 325 μm) over time through week 24, in both studies. These results were maintained through week
72 when patients moved to a Faricimab (Vabysmo) up to q16w adjustable dosing regimen.
In BALATON, at week 24, the proportion of patients with absence of macular edema was 95.3% in patients treated with Faricimab (Vabysmo) q4w versus 93.9% in patients treated with aflibercept q4w; the proportion of patients with absence of IRF was 72.5% in patients treated with Faricimab (Vabysmo) q4w versus 66% in patients treated with aflibercept q4w. The proportion of patients with absence of SRF was 91.3% in patients in the Faricimab (Vabysmo) q4w arm, versus 90.3% in patients in the aflibercept q4w arm.
In COMINO, at week 24, the proportion of patients with absence of macular edema was 93.7% in patients treated with Faricimab (Vabysmo) q4w versus 92% in patients treated with aflibercept q4w. The proportion of patients with absence of IRF was 76.2% in patients treated with Faricimab (Vabysmo) q4w versus 70.8% in patients treated with aflibercept q4w; the proportion of patients with absence of SRF was 96.4% in patients treated with Faricimab (Vabysmo) q4w versus 93.4% in patients treated with aflibercept q4w.
Clinical/Efficacy Studies: Treatment of neovascular (wet) age-related macular degeneration (nAMD): The safety and efficacy of faricimab were evaluated in two 2-arm, randomized (1:1), multicentre, double-masked studies (TENAYA and LUCERNE) in patients with nAMD compared to anti-VEGF treatment. Treatment (faricimab 6 mg or aflibercept 2 mg) was administered by intravitreal injection, initially at 4-week intervals. In the aflibercept arm, the dosing interval after 3 initial aflibercept injections was 8 weeks for the remainder of the study (q8w). In the faricimab arm, the dosing interval was individually adjusted after 4 initial doses. The final (fixed) dosing interval was 8 weeks (q8w), 12 weeks (q12w) or a maximum of 16 weeks (q16w) depending on the change in CST measured using SD-OCT and/or BCVA change measured based on ETDRS letter scores, both defined in the protocol, as well as the treating physician's clinical assessment of the presence/absence of macular hemorrhage at weeks 20 and 24. From week 60 onwards, patients in the Faricimab (Vabysmo) arm were moved to an adjustable dosing regimen, where the dosing interval could be increased by up to 4-week increments (up to q16w) or could be decreased by up to 8 week increments (up to q8w) based on an automated objective assessment of pre-specified visual and anatomical disease activity criteria. Patients in the aflibercept arm remained on q8w dosing throughout the entire study period. Both studies were 112 weeks in duration.
The trials included a total of 1,329 treatment-naïve patients, of whom 1,135 (85%) patients
completing the studies through week 112. A total of 1,326 received at least one dose (including
664 patients in the faricimab arm). The average age [age range] of the population that was
investigated was 75.9 years [50 to 99 years]. The primary efficacy endpoint was the mean change from the baseline in BCVA within the first year (based on the mean over weeks 40, 44 and 48), determined using the Early Treatment Diabetic Retinopathy Study (ETDRS) letter chart at a distance of 4 metres. In both studies, the primary hypothesis (non-inferiority) was confirmed: Patients treated with Faricimab (Vabysmo) at an interval of up to q16w and patients treated with aflibercept q8w exhibited a comparable mean change from their respective baseline at year 1. Meaningful vision gains from baseline were seen through week 112 in both treatment arms. Detailed results for both studies are shown in Tables 1 and 2, as well as in Figure 1 as follows.
The proportion of patients in the personalized treatment interval groups at week 48 in the TENAYA and LUCERNE studies, respectively was: q16w: 46%, 45%; q12w: 34%, 33%; q8w: 20%, 22%.
The proportion of patients in the personalised treatment interval groups at week 112 in the TENAYA and LUCERNE, respectively, was: q16w: 59%, 67%; q12w: 15%, 14%; q8w: 26%, 19%. (See Tables 1, 2 and Figure 1.)
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In both the TENAYA and LUCERNE studies, improvements from baseline in BCVA and CST at
week 60 were comparable across the two treatment arms and consistent with those seen at week 48.
Efficacy outcomes in all evaluable subgroups (e.g. according to age, gender, ethnic origin, baseline visual acuity, lesion type, lesion size) in each study, and in the pooled analysis, were consistent with the outcomes in the overall populations.
In both studies, Faricimab (Vabysmo) administered at intervals of up to q16w demonstrated clinically meaningful improvements from baseline to week 48 in the National Eye Institute Visual Function Questionnaire (NEI VFQ-25) composite score that were comparable to those for aflibercept q8w. Patients in Faricimab (Vabysmo) arms in the TENAYA and LUCERNE studies achieved a ≥4-point improvement from baseline in the NEI VFQ-25 composite score at week 48. This improvement persisted until week 112.
Treatment of diabetic macular edema (DME): The safety and efficacy of faricimab were evaluated in two 3-arm, randomized (1:1:1), multicentre, double-masked studies (YOSEMITE and RHINE) conducted over a period of 2 years in patients with DME in comparison to anti-VEGF treatment. Patients in the three study arms received intravitreal injections of 6 mg faricimab q8w (after 6 monthly injections at the start of the treatment), 6 mg faricimab with a personalised injection interval up to a maximum of q16w (after 4 monthly injections at the start of the treatment or 2 mg aflibercept q8w (after 5 monthly injections at the start of the treatment). In the faricimab arm with extended dosing up to q16w, dosing followed a standardized treat-and-extend approach. Based on changes in CST as measured using OCT and/or changes in BCVA change as measured with the ETDRS letter score, the personalised injection interval in the faricimab group could be extended by 4 weeks or shortened by 4 or 8 weeks at each of the study drug dosing visits (see Dosage & Administration).
The trials included a total of 1,891 patients (of whom approximately 94% had type 2 diabetes
mellitus), with 1,622 (85.8%) patients completing the studies through week 100. A total of 1,887
were treated with at least one dose through week 56 (1,262 with Faricimab (Vabysmo)). The mean age [age range] of the patients studied was 62.2 years [24 to 91 years]. The study population included both anti-VEGF naïve patients (78%) and patients who had undergone previous anti-VEGF therapy (22%).
The primary efficacy endpoint was the mean change in BCVA from baseline to the end of the first year (mean at weeks 48, 52 and 56) determined using the Early Treatment Diabetic Retinopathy Study (ETDRS) letter chart at a distance of 4 metres. In both studies, the primary hypothesis (noninferiority) was confirmed for both treatment arms: patients treated with Faricimab (Vabysmo) q8w or patients treated with Faricimab (Vabysmo) on extended dosing up to q16w and patients treated with aflibercept q8w exhibited a comparable mean change from their respective baselines in BCVA at year 1, and these vision gains were maintained through year 2.
After 4 initial monthly doses, the patients in the Faricimab (Vabysmo) arm with up to q16w adjustable dosing interval could have received a total of at least 6 and a maximum of 21 injections through week 96. At week 52, 74% and 71%, respectively of patients in the respective Faricimab (Vabysmo) arms with up to q16w adjustable dosing in the YOSEMITE and RHINE studies achieved a dosing interval of q16w or q12w (53% and 51% on q16w, 21% and 20% on q12w). Of these patients in the YOSEMITE and RHINE studies, respectively, 75% and 84% maintained ≥q12w dosing without an interval reduction to below q12w through week 96; of the patients on q16w at week 52, 70% and 82% of patients maintained q16w dosing without an interval reduction through week 96. At week 96, 78% of patients in the respective Faricimab (Vabysmo) arm with up to q16w adjustable dosing achieved a q16w or q12w dosing interval in both studies (60% and 65% on q16w, 18% and 14% on q12w). In 4% and 6% of patients in the YOSEMITE and RHINE studies, respectively, the interval was extended to q8w and the patients maintained a dosing interval of ≤q8w through week 96; 3% and 5% were only given a q4w interval up to the end of week 96.
Detailed results from the analyses of the YOSEMITE and RHINE studies are given in Tables 3, 4, 5, 6 and in Figure 2 as follows. (See Tables 3, 4, 5, 6 and Figure 2.)
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Efficacy outcomes in patients who were anti-VEGF treatment naive prior to study participation and in all the other evaluable subgroups (e.g. according to age, gender, ethnic origin, baseline HbA1c, baseline visual acuity) in each study were consistent with the outcomes in the respective overall populations.
The treatment effect was independent of glycemic management, and comparable outcomes were achieved with faricimab treatment in patients whose HbA1c improved or worsened by >0.5% over time, or remained within 0.5% of baseline.
Treatment of Macular Edema Secondary to BRVO and CRVO: The safety and efficacy of faricimab was investigated in two multicentre studies in patients with macular oedema resulting from BRVO (BALATON) or C/HRVO (COMINO). Both studies consisted of an initial 24-week, randomized (1:1), actively controlled (aflibercept) treatment phase. After this, all patients (including those originally treated with aflibercept) were treated with faricimab based on an individually tailored dosage regimen up to week 68 (last visit in week 72). The dosing interval could be extended by 4 weeks up to a maximum of q16w and then shortened again by 4, 8 or 12 weeks, if necessary (deterioration in CST and/or visual acuity), based on disease activity (assessed using an automated objective evaluation of criteria relating to vision and anatomical criteria defined beforehand). The treatment interval was not extended again after stabilisation of disease activity in patients who required a shortening of the interval. This excluded patients with a minimum (4-week) interval between injections.
A total of 1282 patients (553 in BALATON and 729 in COMINO) were enrolled in the two studies, with 1,276 patients treated with at least one dose through week 24 (641 with Faricimab (Vabysmo)).
Both studies showed efficacy in the primary endpoint, defined as the change from baseline in BCVA at week 24, as measured by the ETDRS Letter Score. In both studies, Faricimab (Vabysmo) q4w treated patients had a non-inferior mean change from baseline in BCVA at week 24, compared to patients treated with aflibercept q4w and these vision gains were maintained through week 72 when patients moved to a Vabysmo up to q16w adjustable dosing regimen.
Between week 24 and week 68, 81.5% and 74.0% of the patients receiving Faricimab (Vabysmo) 6 mg up to q16w adjustable dosing regimen achieved a q16w or q12w dosing interval in BALATON and COMINO, respectively. Of these patients, 72.1% and 61.6% completed at least one cycle of q12w, and maintained q16w or q12w dosing interval without an interval reduction below q12w through week 68 in BALATON and COMINO, respectively; 1.2% and 2.5% of the patients received only q4w dosing through week 68 in BALATON and COMINO, respectively.
Detailed results of both studies are shown in Table 7 and 8, Figure 3 and Figure 4 as follows. (See Tables 7 and 8, Figures 3 and 4.)
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Immunogenicity: There is a potential for an immune response in patients treated with Faricimab (Vabysmo) (see Precautions).
After dosing with Faricimab (Vabysmo) for up to 112 (nAMD), 100 (DME) and 72 (BRVO/CRVO)
weeks, treatment-emergent anti-faricimab antibodies were detected in approximately 13.8%, 9.6% and 14.4% of patients with nAMD, DME, and BRVO/ CRVO randomized to faricimab, respectively. The clinical significance of anti-faricimab antibodies regarding safety is unclear at this time. Among patients with anti-faricimab antibodies, a higher incidence of adverse reactions with intraocular inflammation was observed. However, the overall incidence of anti-faricimab antibody positivity and intraocular inflammation in the entire study population is approximately 1%. Anti-faricimab antibodies were not associated with an impact on clinical efficacy or systemic pharmacokinetics.
Pharmacokinetics: Absorption: Faricimab (Vabysmo) is administered intravitreally (IVT) to exert local effects in the eye. There have been no clinical studies performed with other routes of administration.
Based on a population pharmacokinetic analysis (including nAMD and DME N=2,246), maximum free (unbound to VEGF-A and Ang-2) faricimab plasma concentrations (C
max) are estimated to occur approximately 2 days post-dose. Mean (±SD) plasma C
max are estimated 0.23 (0.07) μg/mL and 0.22 (0.07) μg/mL respectively in nAMD and in DME patients. After repeated administrations, mean free plasma faricimab trough concentrations are predicted to be 0.002-0.003 μg/mL for Q8W dosing.
Faricimab exhibited dose-proportional pharmacokinetics (based on C
max and AUC) over the dose range 0.5 mg-6 mg. There was no accumulation of faricimab in the vitreous body or in plasma following monthly dosing based on exposure estimates from the population pharmacokinetic model.
Pharmacokinetic analysis of patients with nAMD, DME, BRVO and CRVO (N=2,977) has shown that the pharmacokinetics of faricimab are comparable in these patients.
Distribution: No information.
Metabolism: The metabolism of faricimab has not been studied directly. Faricimab is assumed to be catabolised into small peptides and amino acids in lysosymes, similar to endogenous lgG molecules.
Elimination: The faricimab plasma concentration-time profile declined in parallel with the concentration-time profiles in the vitreous body and intraocular fluid. The estimated mean ocular half-life and apparent systemic half-life of faricimab are each approximately 7.5 days.
Pharmacokinetics in Special Populations: Pediatric Population: The safety and efficacy of Faricimab (Vabysmo) in pediatric patients have not been established.
Geriatric Population: In the six phase III clinical studies, approximately 58% (1,496/2,571) of patients randomized to treatment with Faricimab (Vabysmo) were aged ≥65 years. Population pharmacokinetic analysis has shown an effect of age on the ocular pharmacokinetics of faricimab, which was not considered clinically meaningful (see Special Dosage Instructions under Dosage & Administration and Use in the Elderly under Precautions).
Renal impairment: No formal pharmacokinetic study has been conducted in patients with renal impairment. Pharmacokinetic analysis of patients in all clinical studies including 1,115 patients with mild, 669 with moderate and 54 with severe renal function disorder revealed no differences with respect to systemic pharmacokinetics of faricimab after intravitreal administration of Faricimab (Vabysmo).
Hepatic impairment: No formal pharmacokinetic study has been conducted in patients with hepatic impairment.
Other demographic factors: The population pharmacokinetic analysis revealed an effect of body weight on the ocular and systemic pharmacokinetics of faricimab. This effect was not considered clinically meaningful, such that, no dose adjustment is required.
A population-kinetic analysis provides no indication for any influences on the systemic pharmacokinetics of Faricimab (Vabysmo) based on ethnic origin or gender.
Toxicology: Nonclinical Safety: Carcinogenicity: No studies have been performed to establish the carcinogenic potential of Faricimab (Vabysmo).
Genotoxicity: No studies have been performed to establish the mutagenic potential of Faricimab (Vabysmo).
Impairment of Fertility: No effects on reproductive organs were observed in a 6-month cynomolgus monkey study at faricimab doses up to 3 mg/eye (8-10x clinical exposures based on AUC).
Reproductive Toxicity: No effects on pregnancy or fetuses were observed in an embryo-fetal development study conducted in pregnant cynomolgus monkeys given 5 weekly intravenous injections of Faricimab (Vabysmo) at 1 mg/kg or 3 mg/kg, starting on day 20 of gestation. Serum exposure (C
max) in monkeys at the no observed adverse effect level (NOAEL) dose of 3 mg/kg was more than 500 times that in humans at a dose of 6 mg given by intravitreal injection once every 4 weeks.