Chronic Pain Master Protocol (CPMP): A Study of LY3526318 in Participants With Osteoarthritis

Inclusion Criteria: * Have a visual analog scale (VAS) pain value ≥40 and \<95 during screening. * Have a history of daily pain for at least 12 weeks based on participant report or medical history. * Have a body mass index \<40 kilograms per meter squared (kg/m²) (inclusive). * Are willing to maintain a consistent regimen of any ongoing nonpharmacologic pain-relieving therapies (for example, physical therapy) and will not start any new nonpharmacologic pain-relieving therapies during study participation. * Are willing to discontinue all medications taken for chronic pain conditions for the duration of the study. * Have presence of index knee pain for \>12 weeks at screening. * Have an x-ray supporting diagnosis of osteoarthritis according to the American College of Rheumatology with a Kellgren-Lawrence grade 2 to 4 radiographic classification of index knee. * Are men, or women able to abide by reproductive and contraceptive requirements. Exclusion Criteria: * Have had a procedure within the past 6 months intended to produce permanent sensory loss in the target area of interest (for example, ablation techniques). * Have surgery planned during the study for any reason, related or not to the disease state under evaluation. * Have, in the judgment of the investigator, an acute, serious, or unstable medical condition or a history or presence of any other medical illness that would preclude study participation. * Have had cancer within 2 years of baseline, except for cutaneous basal cell or squamous cell carcinoma resolved by excision. * Have fibromyalgia * Have a substance use disorder as defined by the Diagnostic and Statistical Manual of Mental Disorders (5th edition; DSM-5; American Psychiatric Association). * Have a positive human immunodeficiency virus (HIV) test result at screening. * Are in the judgment of the investigator, actively suicidal and therefore deemed to be at significant risk for suicide. * Have an intolerance to acetaminophen or paracetamol or any of its excipients. * Have a history of alcohol, illicit drug, analgesic or narcotic use disorder within 2 years prior to screening. * Are largely or wholly incapacitated and unable to participate fully in all protocol procedures, for example, bedridden or confined to a wheelchair, permitting little or no selfcare. * Have presence of surgical hardware or other foreign body in the index knee. * Have an unstable index joint (such as a torn anterior cruciate ligament). * Have had a surgical procedure o…