BOSAYA (denosumab-kyqq)
Bosaya (denosumab-kyqq) is a RANK ligand inhibitor indicated to treat osteoporosis and increase bone mass in patients at high risk for fracture. It is used for postmenopausal women and men with osteoporosis, as well as patients with glucocorticoid-induced osteoporosis. The medication is also indicated to increase bone mass in patients undergoing certain hormone-related cancer treatments, including androgen deprivation therapy for prostate cancer and aromatase inhibitor therapy for breast cancer.
How BOSAYA Works
Bosaya binds to RANKL, a protein essential for the formation, function, and survival of osteoclasts, which are the cells responsible for bone resorption. By preventing RANKL from activating the RANK receptor on the surface of osteoclasts and their precursors, the drug inhibits bone resorption. This process increases bone mass and strength in both cortical and trabecular bone.
Details
- Status
- Prescription
- First Approved
- 2025-09-16
- Routes
- INJECTION
- Dosage Forms
- INJECTABLE
BOSAYA Approval History
What BOSAYA Treats
3 indicationsBOSAYA is approved for 3 conditions since its original approval in 2025. These indications span multiple therapeutic areas including oncology, immunology, and more.
- Osteoporosis
- Glucocorticoid-Induced Osteoporosis
- Breast Cancer
BOSAYA Boxed Warning
SEVERE HYPOCALCEMIA IN PATIENTS WITH ADVANCED KIDNEY DISEASE Patients with advanced chronic kidney disease (eGFR <30 mL/min/1.73 m 2 ), including dialysis-dependent patients, are at greater risk of severe hypocalcemia following denosumab products administration. Severe hypocalcemia resulting in hospitalization, life-threatening events and fatal cases have been reported [see Warnings and Precautions (5.1) ] . The presence of chronic kidney disease-mineral bone disorder (CKD-MBD) markedly increase...
WARNING: SEVERE HYPOCALCEMIA IN PATIENTS WITH ADVANCED KIDNEY DISEASE Patients with advanced chronic kidney disease (eGFR <30 mL/min/1.73 m 2 ), including dialysis-dependent patients, are at greater risk of severe hypocalcemia following denosumab products administration. Severe hypocalcemia resulting in hospitalization, life-threatening events and fatal cases have been reported [see Warnings and Precautions (5.1) ] . The presence of chronic kidney disease-mineral bone disorder (CKD-MBD) markedly increases the risk of hypocalcemia in these patients [see Warnings and Precautions (5.1) ] . Prior to initiating Bosaya in patients with advanced chronic kidney disease, evaluate for the presence of CKD-MBD. Treatment with Bosaya in these patients should be supervised by a healthcare provider with expertise in the diagnosis and management of CKD-MBD [see Dosage and Administration (2.2) and Warnings and Precautions (5.1) ] WARNING: SEVERE HYPOCALCEMIA IN PATIENTS WITH ADVANCED KIDNEY DISEASE See full prescribing information for complete boxed warning. Patients with advanced chronic kidney disease are at greater risk of severe hypocalcemia following denosumab products administration. Severe hypocalcemia resulting in hospitalization, life-threatening events and fatal cases have been reported. ( 5.1 ) The presence of chronic kidney disease-mineral bone disorder (CKD- MBD) markedly increases the risk of hypocalcemia. ( 5.1 ) Prior to initiating Bosaya in patients with advanced chronic kidney disease, evaluate for the presence of CKD-MBD. Treatment with Bosaya in these patients should be supervised by a healthcare provider with expertise in the diagnosis and management of CKD-MBD. ( 2.2 , 5.1 )
Pharmacists can substitute BOSAYA for Prolia without calling the prescriber. This is a lower-cost alternative with no clinically meaningful differences.
BOSAYA Competitive Set
ProThree rings of competition based on shared molecular targets and treated indications.
Direct competitors
Same target(s) AND same indication — head-to-head.
MoA expansion candidates
Same target(s), different indications — where else is this mechanism being explored?
Indication competitors
Same indication, different mechanism — what else might this patient receive?
Filters applied: drops same-active-ingredient (505(b)(2) reformulations), route-mismatch (topical vs systemic), and cross-therapeutic-area matches in same-indication rings.
What's emerging in BOSAYA's indications
See all emerging drugs →Phase 3 candidates targeting molecules with no FDA-approved drug, in indications BOSAYA treats. First-in-class if their pivotal trials read out positive.
Drugs Similar to BOSAYA
3 of 20FDA-approved drugs for similar conditions. Compare mechanisms and indications to understand treatment alternatives.
Active Pipeline
Ongoing clinical trials by development phase
Key Completed Trials
Completed studies with published results, ranked by significance
Trial Timeline
Full development history with FDA approval milestones
Understanding FDA Approval Types
| Count | Type | What it means |
|---|---|---|
| - | ORIG | Original approval - drug first enters market |
| - | SUPPL - Efficacy | New indication (new disease/condition approved) |
| - | SUPPL - Labeling | Label text changes (warnings, dosing updates) |
| - | SUPPL - Manufacturing | Production changes (new facility) |
| - | SUPPL - Chemistry | Formulation changes (new dosage strength) |
Green lines in the timeline show ORIG and Efficacy approvals - the clinically meaningful milestones.
BOSAYA FDA Label Details
Indications & Usage
FDA Label (PDF)BOSAYA is indicated for the treatment of Osteoporosis; Glucocorticoid-Induced Osteoporosis; Breast Cancer.
WARNING: SEVERE HYPOCALCEMIA IN PATIENTS WITH ADVANCED KIDNEY DISEASE Patients with advanced chronic kidney disease (eGFR <30 mL/min/1.73 m 2 ), including dialysis-dependent patients, are at greater risk of severe hypocalcemia following denosumab products administration. Severe hypocalcemia resultin...
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Data Sources
Data sourced from official FDA and NIH databases. Click links to verify on original sources.