Healthy men test new drug copycat in early safety study

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: 1. Male subjects aged ≥18 and ≤45 years; 2. The skin at the injection site is intact, without damage, tattoos, or other markings; 3. Subjects have no history of disease or past medical history abnormalities that, in the judgment of the study physician, would affect the trial; 4. Physical examination, vital signs, chest x-ray, electrocardiogram, and laboratory investigations are normal or show abnormalities without clinical significance. 5. Body weight (BW) ≥50 and ≤75 kg; 6. Body mass index (BMI) ≥19 and ≤24 kg/m² \[BMI = weight (kg) / height² (m²)\]; 7. Within 14 days prior to random allocation, left ventricular ejection fraction (LVEF) assessed by echocardiography is within the normal range (≥55%); Exclusion Criteria: 1. Clinically significant diseases including but not limited to the gastrointestinal tract, kidneys, liver, nerves, blood, endocrine system, tumors, respiratory system, immune system, mental health, and cardiovascular and cerebrovascular diseases; 2. History of allergy or hypersensitivity reactions. 3. Intake of prescription drugs, over-the-counter drugs, or traditional Chinese medicine within 28 days prior to randomization; 4. History of blood donation or blood loss (\>450mL) within 3 months prior to randomization; 5. Positive test results for Hepatitis B Surface Antigen (HbsAg), Hepatitis C Virus (HCV) antibodies, and Human Immunodeficiency Virus (HIV) antibodies, or abnormal and clinically significant quantitative test results for syphilis spirochetes as determined by the sub investigator; 6. History of upper respiratory tract infection or other acute infections within 2 weeks prior to r randomization; 7. History of drug abuse, substance use; 8. History of alcoholism or positive alcohol test results; 11\. History of long-term heavy smoking .