A Phase 3 Study to Compare Between CT-P41 and US-licensed Prolia in Postmenopausal Women With Osteoporosis

A Double-blind, Randomized, Active-controlled, Phase 3 Study to Compare Efficacy, Pharmacokinetics, Pharmacodynamics, and Safety of CT-P41 and US-licensed Prolia in Postmenopausal Women With Osteoporosis

This study is a Double-blind, Randomized, Active-controlled, Phase 3 Study to Compare Efficacy, Pharmacokinetics, Pharmacodynamics, and Safety of CT-P41 and US-licensed Prolia in Postmenopausal Women with Osteoporosis

This is a double-blind, randomized, active-controlled, Phase 3 study to evaluate the efficacy, PK, PD, and safety including immunogenicity of CT-P41 compared with US-licensed Prolia in postmenopausal women with osteoporosis. All patients will also receive daily supplementation containing at least 1,000 mg of elemental calcium and at least 400 IU vitamin D from randomization to EOS visit and the data will be collected via patient's diary.

Inclusion Criteria:

1. Women, 50 to 80 years of age, both inclusive.
2. Body weight between 40.0 and 99.9 kg, both inclusive, when rounded to the nearest tenth.
3. Postmenopausal
4. Bone mineral density T-score ≤ - 2.5 and ≥ - 4.0 at the lumbar spine (L1 to L4) as assessed by the central imaging vendor based on dual-energy X-ray absorptiometry(DXA) scan.
5. Patients must have at least 3 vertebrae considered evaluable at the lumbar spine (L1 to L4) and at least 1 hip considered evaluable by DXA scan assessed by the central imaging vendor. Patients with unilateral metal in hips that would be allowed for the other side of 1 evaluable hip are included.
6. Patient with albumin-adjusted total serum calcium ≥ 8.5 mg/dL (≥ 2.125 mmol/L) at Screening.

Exclusion Criteria:

1. Patient previously received denosumab, any other monoclonal antibodies, or biologic agents for osteoporosis
2. Patient confirmed or suspected with infection of COVID-19 at Screening, or has contact with COVID-19 patient within 14 days from Screening
3. Patient with history and/or presence of one severe or > 2 moderate vertebral fractures as determined by central reading of lateral spine X-ray
4. Patient with history and/or presence of hip fracture
5. Patient with history and/or presence of hyperparathyroidism or hypoparathyroidism, irrespective of current controlled or uncontrolled status
6. Patient with current hyperthyroidism (unless well controlled on stable antithyroid therapy)
7. Patient with current hypothyroidism (unless well controlled on stable thyroid replacement therapy)
8. Patient with history and/or presence of bone disease and metabolic disease (except for osteoporosis) that may interfere with the interpretation of the results