Phase 2, multicenter, randomized, double-blind, placebo-controlled study evaluating once-weekly subcutaneous retatrutide (LY3437943) at multiple maintenance dose levels versus placebo in adults with obesity or overweight with weight-related comorbidities (without type 2 diabetes), alongside standardized diet and physical activity counseling.

The main purpose of the SYNERGY-OUTCOMES study is to find out whether retatrutide and tirzepatide can prevent major adverse liver outcomes (MALO) in people with high-risk metabolic dysfunction-associated steatotic liver disease (MASLD). The study will enroll adults who have MASLD based on non-invasive tests (NITs), which indicate they are more likely to develop MALO. Participants will be randomly assigned within a Master Protocol to receive either retatrutide (N1T-MC-RT01), tirzepatide (N1T-MC-TZ01) or placebo. The trial plans to enroll about 4,500 adults and will run for approximately 224 wee…

The purpose of this study is to investigate the efficacy and safety of different retatrutide dose escalation schemes in participants without type 2 diabetes who have obesity or overweight. Participation in the study will last about 113 weeks.

The purpose of this study is to evaluate the efficacy and safety of retatrutide compared with placebo for body weight reduction. Participation in the study will last about 65 weeks and may include about 18 visits.

The primary objective of Study GZQG is to compare the effect of retatrutide and placebo on total clamp disposition index (cDI) after 28 weeks of treatment.

The main purpose of this study is to evaluate the efficacy and safety of retatrutide in relieving chronic low back pain in participants who have obesity or overweight. Participation in the study will last about 80 weeks.

This is a study of retatrutide in participants with obesity. The main purpose is to learn more about how retatrutide maintains body weight loss. The study will have two treatment phases: an 80 week lead-in phase in which all participants will take retatrutide dose 1 and a 36 week randomized, double-blinded phase in which participants will either take retatrutide dose 1, retatrutide dose 2, or switch to placebo. Participation in the study will last around 125 weeks.

The main purpose of this study is to evaluate the efficacy and safety of retatrutide compared to tirzepatide in adults who have obesity. The study will last about 89 weeks.

The main purpose of this study is to determine if retatrutide can significantly lower the incidence of serious heart-related complications or prevent the worsening of kidney function. The trial will enroll adults with body mass index 27 kg/m\^2 or higher and Atherosclerotic Cardiovascular Disease and/or chronic kidney disease. The study will last for about 5 years. Participants will have up to 27 clinic visits with the study doctor.

The purpose of this study is to investigate the efficacy and safety of retatrutide compared with placebo in participants with Type 2 Diabetes and renal impairment, with inadequate glycemic control on basal insulin alone or a combination of basal insulin with or without metformin and/or sodium-glucose cotransporter-2 (SGLT2) inhibitor. The study will last about 14 months and may include up to 22 visits.

The purpose of this study is to investigate the efficacy and safety of retatrutide compared with semaglutide in participants with Type 2 Diabetes and inadequate glycemic control with metformin with or without sodium-glucose cotransporter-2 inhibitor (SGLT2i). The study will last about 26 months and may include up to 24 visits.

This is a study of LY3437943 in participants who have obesity or are overweight. The main purpose is to learn more about how LY3437943 affects body weight loss. The study will last about 18 months and may include up to 18 visits.

The main purpose of this study is to evaluate the efficacy and safety of LY3437943 in participants with type 2 diabetes (T2D) who failed to achieve adequate glycemic control on diet and exercise alone or on a stable dose of metformin. This study will last about 43 weeks.

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. Addendum (2) is optional and available to approximately 500 participants to continue treatment with retatrutide for up to an additional 24 weeks.

The main purpose of this study is to evaluate the efficacy and safety of retatrutide once weekly in participants with obesity and established cardiovascular disease (CVD). The study will last about 113 weeks.

The purpose of this study is to is to evaluate the efficacy and safety of retatrutide in participants with type 2 diabetes in participants who have obesity or overweight (J1I-MC-GZBK master protocol) including a subset of participants who have obstructive sleep apnea (OSA) (J1I-MC-GSA2). The study will last about 89 weeks and will include up to 24 visits.

The purpose of this study is to investigate the efficacy and safety of retatrutide compared with placebo in participants with Type 2 Diabetes and inadequate glycemic control. The study will last about 11 months and may include up to 11 visits.

The main purpose of this study is to evaluate the safety and efficacy of retatrutide once-weekly in participants who have obesity or are overweight and have osteoarthritis (OA) of the knee. The study will lasts about 77 weeks.

The main purpose of this study is to investigate the effect of retatrutide on renal function in participants with overweight or obesity and chronic kidney disease (CKD), with or without Type 2 Diabetes (T2D). The study will last around 31 weeks.

The main purpose of the study is to look at the effect of the study drug compared to placebo on calorie intake, energy metabolism, and appetite. The study will last up to 6 months and may include up to 20 visits.

The study is conducted in two parts (Part A and B). The main purpose of this study is to look at the amount of the LY3437943 that gets into the blood stream and how long it takes the body to get rid of it when given subcutaneously (SC, under the skin) in the upper arm and thigh compared to the abdomen in healthy participants with high body mass index (BMI) in Part A. In Part B, the participants receive LY3437943 intravenously (IV, through a vein) where the safety and tolerability of LY3437943 are evaluated and information about any side effects experienced will be collected. For each participa…

The purpose of this study is to measure the effect of retatrutide versus placebo, administered every week, on time to recovery from hypoglycemia during hypoglycemic clamp in participants with Type 2 Diabetes Mellitus (T2DM) following 16 weeks of treatment.

The main purpose of this study is to learn about the side effects of LY3437943 when given to participants with type 2 diabetes. Blood tests will be performed to investigate how the body processes the study drug and how the study drug affects the body. Each enrolled participant will receive injections of LY3437943, dulaglutide, or placebo given just under the skin. For each participant, the study will last up to about 5 months and will include 16 visits to the study center.

The main purpose of this study is to learn about the side effects of LY3437943 when given to Japanese participants with type 2 diabetes mellitus. Blood tests will be performed to investigate how the body processes the study drug and how the study drug affects the body. Each enrolled participant will receive injections of LY3437943 or placebo given just under the skin. For each participant, the study will last up to 5 months, inclusive of screening and will include 16 visits to the study center.

The main purpose of this study is to look at the amount of the study drug, LY3437943, that gets into the blood stream and how long it takes the body to get rid of it when given using two different devices. The study will also evaluate the safety and tolerability of LY3437943 and information about any side effects experienced will be collected. For each participant, the total duration of the study will be approximately 16 weeks, including screening.

The main purpose of this study is to determine the effect of LY3437943 when administered subcutaneously on the levels of combined oral contraceptive (COC) ethinyl estradiol and drospirenone in the blood stream in postmenopausal female participants who are overweight or obese. The safety and tolerability of LY3437943 when administered with COC will also be evaluated. This study will last up to approximately 29 weeks for each participant.

This study is being conducted to determine the side effects related to LY3437943 given as a single injection under the skin to healthy participants. Blood tests will be performed to check how much LY3437943 gets into the bloodstream and how long the body takes to get rid of it. Each enrolled participant will receive a single dose of LY3437943 or placebo. The study will last up to approximately 71 days for each participant, including screening.

The main purpose of this study is to measure how much of LY3437943 gets into the bloodstream and how long it takes the body to eliminate it in participants with mild, moderate and severe impaired liver function compared to healthy participants with normal liver function. The safety and tolerability of LY3437943 will also be evaluated. The study may last up to 9 weeks for each participant including the screening period.

The main purpose of this study is to learn about the safety and tolerability of LY3437943 when given to Chinese participants with overweight body mass index (BMI) or obesity. Blood tests will be performed to investigate how the body processes the study drug and how the study drug affects the body. Each enrolled participant will receive injections of LY3437943 or placebo given just under the skin. For each participant, the study will last about 20 weeks excluding screening period and may include up to 20 visits to the study center.

The main purpose of this study is to determine the effect of LY3437943 when administered subcutaneously on the levels of midazolam, warfarin and caffeine in the blood stream when administered orally as a drug cocktail in obese participants. This study will last up to approximately 25 weeks for each participant.

The purpose of this study J1I-MC-GZQE is to measure the effect of retatrutide on the pharmacokinetics (PK) of metoprolol in healthy participants.

The main purpose of this study is to assess the amount of study drug that reaches the bloodstream and the time it takes for the body to get rid of it when given to participants with renal (kidney) impairment compared to healthy participants. The study will last up to 5 weeks, excluding screening.

The main purpose of this study is to is to look at how much LY3437943 gets into the bloodstream and how long the body takes to get rid of it in healthy male participants. This study will involve a single dose of 14C radiolabeled LY3437943. his means that a radioactive tracer substance, C14, will be incorporated into the study drug to investigate the study drug and its breakdown products and to find out how much of these pass from blood into urine, feces and expired air. The study will last up to approximately 15 weeks including the screening period of 28 days.

Provide pre-approval single-patient expanded access of retatrutide (LY3437943), an investigational GLP-1/GIP/glucagon triple receptor agonist being studied for chronic weight management, for adults with severe obesity (body mass index \[BMI\] greater than or equal to \[≥\]35 kilogram per square meter \[kg/m²\] and at least two serious or life-threatening obesity-related complications who are refractory to the best approved therapy and are unable to participate in an ongoing clinical trial of retatrutide or a comparable investigational medicine.