A Chronic Pain Master Protocol (CPMP): A Study of LY4065967 in Participants With Diabetic Peripheral Neuropathic Pain

Inclusion Criteria:

* Have presence of diabetic peripheral neuropathy, of symmetrical nature and in lower extremities for ≥6 months and diagnosed by a score of Part B ≥3 on Michigan Neuropathy Screening Instrument (©University of Michigan)
* Have a history and current diagnosis of type 1 or type 2 diabetes mellitus.
* Have an HbA1c \<11% and on a stable regimen for treatment of diabetes at least 90 days prior to screening
* Have a body mass index at screening of ≤40 kilogram per meter squared (kg/m2)

Exclusion Criteria:

* Are pregnant or breastfeeding
* Have a history of other potentially causative and/or confounding sources of pain that may impair self-assessment of pain due to diabetic peripheral neuropathic pain (DPNP)
* Have lower limb amputation due to diabetes inclusive of great toe (metatarsal bone)
* Have serum vitamin B12 ≤200 picogram per milliliter (pg/mL)
* Have an abnormal BP (systolic BP \>140 mm Hg and diastolic BP\>90 mm Hg) at screening
* Have history or current clinically significant cardiac disease, including arrhythmia, aortic aneurysm, heart failure, current electrolyte abnormalities, or any other conditions that could predispose to arrhythmia in the judgement of the investigator