A Study of Tirzepatide (LY3298176) in Adult Participants in India With Either Type 2 Diabetes Mellitus or Obesity

The main purpose of this study is to measure the safety and efficacy of tirzepatide in adult participants in India who have type 2 diabetes or who have obesity or overweight without type 2 diabetes. Participation in the study will last about 46 weeks.

Inclusion Criteria: Participants with Type 2 Diabetes: * Have had type 2 diabetes for at least one year * Insulin naive * Have HbA1c ≥7.5% and ≤10% at screening * Have body mass index (BMI) ≥23 kilograms per square meter (kg/m2) Participants with Obesity or Overweight without Type 2 Diabetes: * Have a BMI * Greater than or equal to 30 kg/m2 OR * Greater than or equal to 27 kg/m2 AND previously diagnosed with at least one of the following weight-related comorbidities: high blood pressure, lipid disorder, obstructive sleep apnea, heart disease Exclusion Criteria: Participants with Type 2 Diabetes: * Have type 1 diabetes * Have had any of the following heart conditions within 6 months prior to screening: * heart attack * stroke * hospitalization due to heart failure * Have New York Heart Association Functional Classification Class III or IV congestive heart failure (CHF) * Have type 2 diabetes along with morbid obesity and being considered for bariatric surgery or any other procedure intended for weight loss Participants with Obesity or Overweight without Type 2 Diabetes: * Have type 1 diabetes or type 2 diabetes * Have a self-reported change in body weight greater than 5 kilograms (kg) (11 pounds) within 3 months prior to screening * Have a prior or planned surgical treatment for obesity * Have had any of the following heart conditions within 6 months prior to screening: * heart attack * stroke * hospitalization due to heart failure * Have New York Heart Association Functional Classification Class III or IV CHF * Have taken any medications or alternative remedies for weight loss within 3 months prior to screening