A Study to Determine the Safety and the Efficacy of Fasinumab Compared to Placebo and Naproxen for Treatment of Adults With Pain From Osteoarthritis of the Knee or Hip

Inclusion Criteria include, but are not limited to, the following:

Year 1:

• Male and female patients, at least 18 years of age, at screening
• A clinical diagnosis of OA of the knee or hip based on the American College of Rheumatology criteria with radiologic evidence of OA (K-L score ≥2 for the index joint) at the screening visit
• Moderate to severe pain in the index joint defined at both the screening and randomization visits
• Willing to discontinue current pain medications and to adhere to study requirements for rescue treatments (acetaminophen/paracetamol) to be taken as needed with a maximum daily dose of 2500 mg (countries where 500 mg strength tablets/capsules are available) or 2600 mg (countries where 325 mg strength tablets/capsules are available)
• A history of at least 12 weeks of analgesics use for pain due to OA of the knee or hip, as defined by:
• Inadequate pain relief from acetaminophen/paracetamol AND
• Intolerance to or inadequate pain relief from opioid or tramadol therapy, unwillingness to take opioid or tramadol therapy for a medically acceptable reason, or lack of access to an opioid or to tramadol
• Currently using a stable dose of NSAID.
• Willing to discontinue glucosamine sulfate and chondroitin sulfate treatments during the initial 16 weeks of treatment
• Stable treatment with glucosamine sulfate and chondroitin sulfate treatments must be stopped during the pre-randomization period
• Consent to allow all radiographs and medical/surgical/hospitalization records of care received elsewhere prior to and during the study period to be shared with the investigator
• Willing to maintain current activity and exercise levels throughout the study
• Willing and able to comply with clinic visits and study-related procedures and willing to provide follow-up information related to any JR surgery that occurs within the period of time covered by their intended participation in the study
• Able to understand and complete study-related questionnaires

Year 2:

Note: Any Year 1 patient attending their week 52 visit on or after 26 March 2020 will no longer have the option to enroll into Year 2.

• Completed the treatment period of Year 1
• Did not permanently discontinue study drug during Year 1
• Received no less than 10 of the 13 planned doses of SC study drug during the treatment period of Year 1
• Provide informed consent for Year 2
• Willing to continue to maintain current activity and exercise levels throughout Year 2

Exclusion Criteria include, but are not limited to, the following:

• Non-compliance with the Numeric Rating Scale (NRS) recording during the pre-randomization period
• History or presence at the screening visit of non-OA inflammatory joint disease, Paget's disease of the spine, pelvis or femur, neuropathic disorders, multiple sclerosis, fibromyalgia, tumors or infections of the spinal cord, or renal osteodystrophy
• History or presence on imaging of arthropathy, neuropathic joint arthropathy, hip or knee dislocation, extensive subchondral cysts, significant bone collapse or bone loss, or pathologic fractures
• Trauma to the index joint within 3 months prior to the screening visit
• Signs or symptoms of carpal tunnel syndrome within 6 months of screening
• Patient is not a candidate for MRI
• Is scheduled for a JR surgery to be performed during the study period or who would be unwilling or unable to undergo JR surgery if needed
• History or presence at the screening visit of autonomic or diabetic neuropathy, or other peripheral neuropathy, including reflex sympathetic dystrophy
• History or diagnosis of chronic autonomic failure syndrome including pure autonomic failure, multiple system atrophy
• History of naproxen intolerance, or existence of a medical condition that is high risk for naproxen-associated complications
• Resting heart rate of 100 bpm at the screening or randomization visits
• History or presence of 2nd or 3rd degree heart block, 1st degree h