This will be a 24-week, randomized, double-blinded, placebo-controlled, parallel group proof-of-concept study with two arms (active and placebo). The plan is to enroll 30 subjects. There will be a four-week screening period to identify subjects that meet the diagnostic criteria (DC/TMD) for myalgia, recommended by the International RDC/TMD Consortium Network and Orofacial Pain Special Interest Group. The Diagnostic Criteria for Temporomandibular Disorders Symptom Questionnaire and DC/TMD Examination Form will be used during Screening and Baseline visits to confirm the TMD diagnosis and determine whether subjects meet the inclusion/exclusion criteria.~Subjects will attend a Screening visit followed by Baseline visit to randomize eligible subjects to active (EREN) or placebo (EREN-P). During the Baseline visit and Wks 4, 8, 12, and 16, subjects will receive treatment with either 140 mg of EREN or Placebo administered by subcutaneous injection. At Baseline and Wks 4, 8, 12, 16, 20, and 24 subjects will be instructed to complete the Brief Pain Inventory (BPI); PEG (Pain, Enjoyment, General Activity) Scale; pain mediation assessment; Patient Global Impression of Change (PGIC) (except for Baseline visit); Jaw Function Limitation Scale (JFLS); Patient Health Questionnaire (PHQ-4); and Somatic Symptom Scale (SSS-8). These visits will include review of continuance criteria and adverse event collection.~At the Screening and Baseline visits the subjects will be instructed on how to use the PEG Scale and pain use assessment app, which will be downloaded on their smartphone, to provide a daily assessment of their pain intensity and interference with enjoyment and general activity (PEG) and their daily used of pain medications. Subjects who do not own a smartphone or are unwilling to use the app on a daily basis will only complete the PEG and pain medication assessment at the Baseline visit and all subsequent visits using the app onsite.
The purpose of this proof of concept study is to evaluate the safety and efficacy of the off-label use of Aimovig® (EREN) in reducing Temporomandibular Disorder (TMD) pain compared to placebo.