The main purpose of this study is to evaluate the safety and efficacy of tirzepatide in adolescents that have obesity or overweight with at least one weight-related comorbidity. The study will last approximately 90 weeks and may include up to 25 visits.

Participants who have completed the primary 72-week GPHP study and have been off treatment for no more than 12 weeks (including the 4-week safety follow-up period), will have the opportunity to receive an additional 156 weeks of treatment with tirzepatide as well as continuing the lifestyle intervention.

Inclusion Criteria:

• Have obesity, as defined by BMI equal to or above the 95th percentile for age and sex, on age- and sex-specific growth chart, OR

• Have overweight, as defined by BMI equal to or above the 85th percentile but less than the 95th percentile for age and sex, on age- and sex-specific growth chart, with at least 1 weight-related comorbidity.

  • dyslipidemia
  • pre-hypertension
  • hypertension
  • nonalcoholic fatty liver disease
  • obstructive sleep apnea
  • prediabetes
  • documented preexisting condition of Type 2 Diabetes

Participants with Type 2 Diabetes Mellitus (T2DM)

• Have been treated with either diet and exercise alone or stable treatment with metformin for at least 90 days prior to screening and have a HbA1c<9.0%

Exclusion Criteria:

• Have a self-reported, or by parent or legal guardian where applicable, decrease in body weight more than 5 kilogram (kg) (11 lbs.) within 90 days before screening irrespective of medical records.

• Have Type 1 Diabetes

• Have taken within 90 days before screening or intend to start prescribed or over-the-counter medications, or alternative remedies including herbal or nutritional supplements, intended to promote body weight reduction.

• Are prepubertal (Tanner stage 1).

• Have a family or personal history of medullary thyroid carcinoma (MTC) or Multiple Endocrine Neoplasia (MEN) Syndrome Type 2

• Have a history of chronic or acute pancreatitis.

• Have undergone or plan to undergo weight reduction procedure during the study, such as, but not limited to

  • gastric bypass
  • sleeve gastrectomy
  • restrictive bariatric surgery, such as Lap-Band gastric banding, or
  • any other procedure intended to result in weight reduction.

Anonymized individual patient level data will be provided in a secure access environment upon approval of a research proposal and a signed data sharing agreement.

Data are available 6 months after the primary publication and approval of the indication studied in the US and European Union (EU), whichever is later. Data will be indefinitely available for requesting.

A research proposal must be approved by an independent review panel and researchers must sign a data sharing agreement.