A Study of Retatrutide (LY3437943) in Participants Who Have Obesity or Overweight

About the study

The purpose of this study is to evaluate the efficacy and safety of retatrutide in participants who have obesity or overweight (J1I-MC-GZBJ master protocol) including subsets of participants who have knee osteoarthritis (OA) (J1I-MC-GOA1) or who have obstructive sleep apnea (OSA) (J1I-MC-GSA1). This study will last about 89 weeks and will include up to 24 visits.

Who can take part

You may be eligible to participate in the study if you meet the following criteria:

INCLUSION CRITERIA

Inclusion Criteria:

* Have body mass index (BMI) ≥30.0 kilograms per square meter (kg/m²), or ≥27.0 kg/m² with at least one of the following:

hypertension
dyslipidemia
obstructive sleep apnea, or
cardiovascular disease
History of of at least one unsuccessful dietary effort to reduce body weight

GOA1 Inclusion Criteria:

Have index knee pain for >12 weeks prior to screening, and presence of index knee pain for >15 days over the previous month
Have knee X-ray with moderate radiographic changes (Kellgren-Lawrence Grade 2 or 3) per central reading at screening
Currently meets American College of Rheumatology (ACR) Criteria (clinical and radiological) for OA.

GSA1 Inclusion Criteria:

Previously diagnosed with OSA
Have AHI ≥15 on polysomnography at screening (definition of moderate-to-severe OS)
For participants not on positive airway pressure (PAP) therapy: unable or unwilling to use PAP therapy and have not used PAP for at least 4 weeks prior to screening.
If on PAP therapy, have been on PAP therapy for at least 3 consecutive months prior to screening, and willing to temporarily stop using PAP therapy for approximately 7 days prior to each of the sleep study (PSG) visits.

EXCLUSION CRITERIA

Exclusion Criteria:

Have a self-reported or documented change in body weight >5 kg (11 pounds) within 90 days.
Have taken weight loss drugs, including over-the-counter medications, within 90 days prior to screening.
Have a prior or planned surgical treatment for obesity.
Have diabetes mellitus.
Have family or personal history of medullary thyroid carcinoma (MTC) or multiple endocrine neoplasia syndrome type 2 (MEN-2)
Have had pancreatitis.

GOA1 exclusion criteria

Have had steroid joint injections within 90 days of screening.
Have had other joint injections and procedures within 6 months of screening.
Have joint disease other than osteoarthritis.

GSA1 exclusion criteria

Use stimulants (for example, modafinil, armodafinil, solriamfetol, pitolisant, amphetamine) less than 3 months prior to screening.
Use hypnotics, mirtazapine, opioids, trazodone, and zonisamide less than 3 months prior to screening.
Use a dental appliance or other device to treat OSA other than PAP therapy.