The primary objective of the study is to evaluate the efficacy of BIIB074 in treating pain experienced by participants with trigeminal neuralgia (TN). Secondary objectives of this study are to investigate the safety and tolerability of BIIB074 in participants with TN and to evaluate the population pharmacokinetics (PK) of BIIB074.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Percentage of Participants Classified as Responders at Week 12 of the Double-Blind Period
A participant who meets all of the following criteria will be classified as a responder: (1)Has a reduction of \>=30% in mean pain score compared with baseline (2)Has not discontinued randomized treatment before the end of Week 12 of the double-blind period (3)Has not taken prohibited pain medication before the end of Week 12 of the double-blind period.
Time frame: Week 12
Number of Participants Experiencing Adverse Events (AEs) and Serious Adverse Events (SAEs) During the Long Term Extension (LTE) Period
An AE is any untoward medical occurrence in a participant or clinical investigation participant administered a pharmaceutical product and that does not necessarily have a causal relationship with this treatment. An AE can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease temporally associated with the use of a medicinal (investigational) product, whether or not related to the medicinal (investigational) product. An SAE was defined as any untoward medical occurrence that at any dose: results in death; in the view of the Investigator, places the participant at immediate risk of death (a life-threatening event; however, this does not include an event that, had it occurred in a more severe form, might have caused death); requires inpatient hospitalization or prolongation of existing hospitalization; results in persistent or significant disability/incapacity; or results in a congenital anomaly/birth defect.
Time frame: Baseline up to Week 52
Percentage of Participants Classified as Responders Achieving Patient Global Impression of Change (PGIC) Response at Week 12 of the Double- Blind Period
A participant who meets all of the following criteria will be classified as a responder: (1) Achieving Patient Global Impression of Change (PGIC) response of "Much Improved" or "Very Much Improved" at Week 12 of the double-blind period (2) has not discontinued randomized study treatment before the end of Week 12 of the double-blind period, (3)has not taken prohibited pain medication before the end of Week 12 of the double-blind period. PGIC is a 7-point self-report scale depicting a participant's rating of overall improvement. Participants rate their change as "very much improved," "much improved," "minimally improved," "no change," "minimally worse," "much worse," or "very much worse."
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Time frame: Week 12
Percentage of Participants Classified as Responders Achieving >=50 Percent Reduction From Baseline Mean Number of Paroxysms at Week 12
A participant who meets all of the following criteria will be classified as a responder: (1) Achieving \>=50 percent reduction from baseline mean number of paroxysms at Week 12 (2) has not discontinued randomized study treatment before the end of Week 12 of the double-blind period, (3)has not taken prohibited pain medication before the end of Week 12 of the double-blind period. A paroxysm is a trigeminal neuralgia pain attack.
Time frame: Week 12
Percentage of Participants Classified as Responders Achieving >=50 Percent Reduction From Baseline Mean Pain Score at Week 12
A participant who meets all of the following criteria will be classified as a responder: (1) Achieving \>=50 percent reduction from baseline mean pain score at Week 12 (2) has not discontinued randomized study treatment before the end of Week 12 of the double-blind period, (3)has not taken prohibited pain medication before the end of Week 12 of the double-blind period. Pain score is a 11-point numerical rating scale where 0 = no pain; 10 = maximum pain imaginable. Higher scores representing more pain.
Time frame: Week 12
Number of Participants Experiencing Adverse Events (AEs) and Serious Adverse Events (SAEs) During Double Blind Period
An AE is any untoward medical occurrence in a participant or clinical investigation participant administered a pharmaceutical product and that does not necessarily have a causal relationship with this treatment. An AE can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease temporally associated with the use of a medicinal (investigational) product, whether or not related to the medicinal (investigational) product. An SAE was defined as any untoward medical occurrence that at any dose: results in death; in the view of the Investigator, places the participant at immediate risk of death (a life-threatening event; however, this does not include an event that, had it occurred in a more severe form, might have caused death); requires inpatient hospitalization or prolongation of existing hospitalization; results in persistent or significant disability/incapacity; or results in a congenital anomaly/birth defect.
Time frame: Up to Week 14 of Double blind period
Area Under the Plasma Concentration- Time Curve at Steady State (AUC,ss)
AUC,ss= Area under the plasma concentration versus time curve (AUC) at steady state.
Time frame: Day 15, 29, 43, 57, 71, 85, 99, 113, 127, 141, premature treatment discontinuation (if occurred)
Maximum Observed Plasma Concentration at Steady State (Cmax,ss)
Cmax,ss= Maximum Observed Plasma Concentration at Steady State
Time frame: Day 15, 29, 43, 57, 71, 85, 99, 113, 127, 141, premature treatment discontinuation (if occurred)
Percentage of Participants with >=30% Reduction From Baseline in Mean Pain Score During the Long Term Extension (LTE) Period
Pain score is a 11-point numerical rating scale where 0 = no pain; 10 = maximum pain imaginable. Higher scores representing more pain.
Time frame: Week 1 through Week 52
Change From Baseline in Mean Pain Score During the Long Term Extension (LTE) Period
Pain score is a 11-point numerical rating scale where 0 = no pain; 10 = maximum pain imaginable. Higher scores representing more pain.
Time frame: Baseline, Week 1 through Week 52
Change From Baseline In Mean Worst Pain Score During the Long Term Extension (LTE) Period
Pain score is a 11-point numerical rating scale where 0 = no pain; 10 = maximum pain imaginable. Higher scores representing more pain.
Time frame: Baseline, Week 1 through Week 52
Percentage of Participants with >=50% Reduction From Baseline in Mean Number of Paroxysms During Long Term Extension (LTE) Period
Paroxysms are trigeminal neuralgia pain attacks. They are short, severe, and sharp, shooting, stabbing, or shock-like.
Time frame: Week 1 through Week 52
Change From Baseline in Mean Number of Paroxysms During Long Term Extension (LTE) Period
Paroxysms are trigeminal neuralgia pain attacks. They are short, severe, and sharp, shooting, stabbing, or shock-like.
Time frame: Baseline, Week 1 through Week 52
Percentage of Participants With a PGIC Response of "Much Improved or "Very Much Improved" by Visit During the Long Term Extension (LTE) Period
PGIC is a 7-point self-report scale depicting a participant's rating of overall improvement. Participants rate their change as "very much improved," "much improved," "minimally improved," "no change," "minimally worse," "much worse," or "very much worse." Participants having response "Much Improved or Very Much Improved" will be reported.
Time frame: Day 1, Week 2, 4, 6, 8, every 12 weeks up to Week 52
Change From Baseline in the Penn Facial Pain Scale-Revised (PENN-FPS-R) Score by Visit During the Long Term Extension (LTE) Period
The Penn-FPS-R is a new 12-item Health-Related Quality of Life outcome measure with content validity that can be used to assess and monitor the impact of Trigeminal Neuralgia and facial pain treatment interventions in both clinical practice and research. This scale uses the 0-10 numeric rating scale (NRS) to quantify the pain impact different activities and quality of life items, where 0 indicates no interference and 10 indicates complete interference. The sum of the rated NRS score will be calculated.
Time frame: Baseline, Day 1, Week 2, 4, 6, 8, every 12 weeks up to Week 52
Change From Baseline in the EuroQoL 5 Dimension 5 Level (EQ-5D-5L) Score by Visit During the Long Term Extension (LTE) Period
EQ-5D-5L is a standardized, subject-rated instrument for use as a measure of health outcomes. The EQ 5D-5L includes 2 components: the EQ-5D-5L descriptive system and the EQ-Visual Analog Scale (EQ-VAS). The EQ-5D-5L descriptive system provides a profile of the participant's health state in 5 dimensions (mobility, self-care, usual activities, pain/discomfort, and anxiety/depression). For each dimension, the participant is instructed to indicate whether he or she has no problems, slight problems, moderate problems, severe problems, and extreme problems. A negative change from Baseline indicates improvement.
Time frame: Baseline, Day 1, Week 4, 8, every 12 weeks up to Week 52
Change From Baseline in the Work Productivity and Activity Impairment (WPAI) Neuropathic Pain (V2.0) Score by Visit During the Long Term Extension (LTE) Period
The WPAI questionnaire is a validated instrument to measure impairments in work and activities. The WPAI yields four types of scores: 1. Absenteeism (percentage of work time missed) 2. Presenteeism (percentage of impairment at work/reduced on-the-job effectiveness) 3. Work productivity loss (percentage of overall work impairment \[absenteeism plus presenteeism\]) 4. Activity Impairment (percentage of overall activity impairment). WPAI outcomes are expressed as impairment percentages, with higher numbers indicating greater impairment and less productivity.
Time frame: Baseline, Day 1, Week 4, 8, every 12 weeks up to Week 52