he purpose of this study is to evaluate the efficacy and safety of SYHX2008 injection in in patients with acromegaly.

This study is a randomized, parallel, open-label, multicenter, positive-controlled, superiority-designed Phase III clinical study evaluating the efficacy and safety of octreotide long-acting injection in patients with acromegaly. The purpose of this study is to evaluate the efficacy and safety of SYHX2008 injection in treating acromegaly. Patients will be randomized to SYHX2008 cohort or Octreotide Microspheres(Sandostatin LAR®) cohort. A total of 154 participants are expected to be enrolled. The study will consist of a maximum 4-week screening/Baseline period, followed by 28-week treatment period.

Inclusion Criteria:

• Male or female participants aged 18 to 80 years (including boundary values)
• Diagnosed with acromegaly, currently in the active stage of the disease (for patients who have not undergone pituitary tumor surgery before, MRI shows a pituitary mass, fasting GH ≥ 2.5 ng/mL and IGF-1 index ≥ 1.3; for patients who have undergone pituitary tumor surgery, fasting GH ≥ 2.5 ng/mL and IGF-1 index ≥ 1.3)；

Exclusion Criteria:

• Have received pituitary radiotherapy within the 5 years prior to screening
• Have undergone major surgery (including pituitary surgery) within 6 months prior to screening or are expected to require surgery (including pituitary surgery) or radiotherapy during the study period
• Within three months before the screening, participants received drugs such as long-acting lanretide, long-acting octreotide, pervesomone, and cabergoline, or traditional Chinese medicines for treating acromegaly. Receive bromocriptine within one month before screening; Received short-acting octreotide or lanretide short-acting preparations for treatment within 7 days before screening; Or have received any other investigational drug within 30 days before screening or within 5 half-lives (whichever is longer)
• Previous failure to respond to octreotide or lantreotide monotherapy (defined as: after at least 3 months of treatment with octreotide microspheres ≥30 mg or lantreotide ≥120 mg, or after at least 3 months of treatment with parietide microspheres ≥40 mg, random GH ≥2.5 ng/mL and/or IGF-1 index ≥1.3) or history of intolerance.
• Participants with obvious visual field defects caused by optic chiasm compression and requiring surgical intervention
• HbA1c>8.5%