This is a 56-week randomized, open-label, controlled study evaluating the efficacy and safety of the HDM1005 compared to tirzepatide in adults with obesity but without diabetes. Eligible participants will be screened and randomized to different dose group of HDM1005 or the tirzepatide group at a ratio of 1:1:1 :1, HDM1005 or tirzepatide will be given once weekly for 52 weeks, following by a safety follow up of 4 weeks. All participants received a lifestyle intervention that involved counselling on diet and physical activity.
The age of signing ICF was from 18 to 65 years old (including both ends), regardless of gender.
BMI ≥28.0 but <40.0 kg/m2 at screening and randomization
Participants reported that they had been under diet and exercise control for 3 months or more before screening, and their weight change (the difference between the maximum body weight and the minimum body weight) in the past 3 months was less than 5%.
fertile female subjects who have taken and agreed to continue to take effective contraceptive measures from 14 days before signing ICF to 60 days after the last dose, and have no plans to give birth and donate eggs; Male subjects signed ICF until 90 days after the last dose, had no fertility plan and sperm donation plan, and agreed to use highly effective contraception.
Previous diagnosis of type 1, type 2, or any other type of diabetes.
History or family history of medullary thyroid carcinoma, C cell hyperplasia, or multiple endocrine neoplasia type
According to the investigator's judgment, the subjects have endocrine diseases or histories that affect gastric emptying, may significantly affect body weight, or diseases or conditions that affect the absorption of gastrointestinal nutrients, such as Cushing syndrome, hypothyroidism or hyperthyroidism, bariatric surgery or other gastrectomy, irritable bowel syndrome, dyspepsia, and chronic pancreatitis; Or a history of acute pancreatitis or acute gallbladder disease within 3 months before signing ICF.
Hypertension that was not stably controlled at screening: systolic blood pressure ≥160 mmHg or diastolic blood pressure ≥100 mmHg (with stable treatment for at least 30 days if antihypertensive medications were used).