Jubbonti

Pronunciation: Jue-bon'-tee
Generic name: denosumab-bbdz
Dosage form: injection for subcutaneous use
Drug class: Miscellaneous bone resorption inhibitors

Medically reviewed by Carmen Pope, BPharm. Last updated on Apr 3, 2024.

What is Jubbonti?

Jubbonti (denosumab-bbdz) is an injection that is administered subcutaneously (under the skin) once every 6 months by a healthcare provider to:

• Treat osteoporosis in postmenopausal women at high risk for fracture
• Increase bone mass in men with osteoporosis at high risk for fracture
• Treat glucocorticoid-induced osteoporosis in men and women at high risk for fracture
• Increase bone mass in men at high risk for fracture receiving androgen deprivation therapy for nonmetastatic prostate cancer
• Increase bone mass in women at high risk for fracture receiving adjuvant aromatase inhibitor therapy for breast cancer.

Bone is always breaking down and reforming. Everyone has osteoclasts that dissolve old and damaged bone and osteoblasts that form new bones and add growth to existing bone tissue. Jubbonti works by stopping the formation of osteoclasts before they can reach and damage the bone. It binds to RANKL, which is a protein on the membrane of osteoclasts that is essential for their formation, function, and survival. This inhibits osteoclast formation, which decreases bone resorption and increases bone mass and strength in both cortical (hard bone) and trabecular (spongy bone) bone. Jubbonti is a monoclonal antibody that targets and inhibits RANK ligand (RANKL).

Jubbonti is an interchangeable biosimilar to Prolia (denosumab) and was FDA-approved on March 5, 2024. An interchangeable biosimilar is a biological product that can be substituted in the pharmacy for the reference biologic because there are no clinically meaningful differences in terms of safety, purity, and potency.

Warnings

Jubbonti carries a boxed warning for life-threatening severe hypocalcemia (very low calcium levels); the risk is higher in patients with advanced chronic kidney disease (CKD), particularly those on dialysis. The risk increases even more in those with CKD who also have a condition known as mineral and bone disorder (CKD-MBD). Your healthcare provider will evaluate you for hypocalcemia and CKD-MBD before starting treatment and monitor you throughout. Pre-existing low calcium levels should be corrected before starting treatment.

If you receive Jubbonti, you should not receive Prolia, Xgeva, or Wyost. Jubbonti contains the same medicine (denosumab).

Serious and life-threatening hypersensitivity reactions have occurred with Jubbonti, including anaphylaxis. Seek emergency help or tell your doctor immediately if you experience shortness of breath, throat tightness, swelling of the airways and throat, itching, low blood pressure, or hives.

Osteonecrosis of the jaw has been reported with Jubbonti. A routine oral exam should be performed before Jubbonti treatment and preventive dentistry undertaken if necessary, especially for those with risk factors such as prior tooth extraction, dental implants, oral surgery, cancer,  or poor oral hygiene. Good oral hygiene practices should be maintained during treatment with Jubbonti.

Atypical low energy or low trauma femoral fractures have been reported with Jubbonti. Contact your doctor immediately if you develop thigh or groin pain. Multiple vertebral fractures have been reported following Jubbonti discontinuation. Your healthcare provider should consider transitioning you to another antiresorptive agent.

Serious infections including skin infections may occur, including those leading to hospitalization. Seek emergency help or tell your healthcare provider immediately if you develop any signs or symptoms of an infection, including cellulitis (symptoms include a red, swollen, and painful area of skin that is warm and tender to the touch. Some people may also develop fever and chills).

Other severe side effects including severe skin rashes and eczema, bone over-suppression, or severe bone, joint, or muscle pain may occur. Tell your healthcare provider immediately.

Before taking

Tell your doctor about all of your medical conditions, including if you:

• are allergic to denosumab or latex
• are taking a medicine called Xgeva (denosumab). Xgeva contains the same medicine as Jubbonti
• have low blood calcium
• cannot take daily calcium and vitamin D
• had parathyroid or thyroid surgery (glands located in your neck) or intestinal surgery
• have been told you have trouble absorbing minerals in your stomach or intestines (malabsorption syndrome)
• have kidney problems or are on kidney dialysis
• have a weak immune system
• are taking medicine that can lower your blood calcium levels
• plan to have dental surgery or teeth removed
• are pregnant or plan to become pregnant. Jubbonti may harm your unborn baby
• are breastfeeding or plan to breastfeed.

Pregnancy

For females who can become pregnant, your healthcare provider should do a pregnancy test before you start treatment with Jubbonti. You should use an effective method of birth control (contraception) during treatment with Jubbonti and for at least 5 months after your last dose. Tell your doctor right away if you inadvertently become pregnant.

Breastfeeding

It is not known if Jubbonti passes into your breast milk. You and your doctor should decide if you will take Jubbonti or breastfeed. You should not do both.

How is Jubbonti administered?

Jubbonti is an injection that will be given to you by a healthcare professional. Jubbonti is injected under your skin (subcutaneously).

• You will receive Jubbonti 1 time every 6 months.
• You should take calcium and vitamin D as your doctor tells you to while you receive Jubbonti.
• Take good care of your teeth and gums while you receive Jubbonti. Brush and floss your teeth regularly. If you need to have any dental work (especially surgery), tell the dentist ahead of time that you are using Jubbonti. You may need to stop using the medicine for a short time.

Talk with your doctor before starting Jubbonti treatment. After your treatment with Jubbonti is stopped, or if you skip or delay taking a dose, your risk of breaking bones, including bones in your spine, is increased. Your risk of having more than 1 broken bone in your spine is increased if you have already had a broken bone in your spine. Do not stop, skip, or delay taking Jubbonti without first talking with your doctor. If your Jubbonti treatment is stopped, talk to your doctor about other medicines that you can take.

• Your risk of bone fractures can increase when you stop, skip, or delay using Jubbonti. Do not stop using this medicine without first talking to your doctor.

What happens if I miss a dose?

Call your doctor for instructions if you miss a dose or miss an appointment for your Jubbonti injection. You should receive your missed injection as soon as possible.

What happens if I overdose?

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.

What are the side effects of Jubbonti?

Serious allergic reactions have happened in people who take Jubbonti. Call your doctor or go to your nearest emergency room right away if you have any symptoms of a serious allergic reaction such as low blood pressure (hypotension), trouble breathing, throat tightness, swelling of your face, lips, or tongue, rash, itching, or hives.

Jubbonti can cause serious side effects including:

• Increased risk of severe low calcium levels in your blood (hypocalcemia). Jubbonti may lower the calcium levels in your blood. If you have low blood calcium before you start receiving Jubbonti, it may get worse during treatment. Your low blood calcium must be treated before you receive Jubbonti. Talk to your doctor before starting Jubbonti. Your doctor may prescribe calcium and vitamin D to help prevent low calcium levels in your blood while you take Jubbonti. Take calcium and vitamin D as your doctor tells you to. Most people with low blood calcium levels do not have symptoms, but some people may have symptoms. Call your doctor right away if you have symptoms of low blood calcium such as spasms, twitches, or cramps in your muscles, or numbness or tingling in your fingers, toes, or around your mouth
• Severe jaw bone problems (osteonecrosis). Your doctor should examine your mouth before you start Jubbonti. Your doctor may tell you to see your dentist before you start Jubbonti. You need to practice good mouth care during treatment with Jubbonti
• Unusual thigh bone fractures. Symptoms of a fracture include new or unusual pain in your hip, groin, or thigh
• Increased risk of broken bones, including broken bones in the spine, after stopping, skipping, or delaying Jubbonti
• Serious infections in your skin, lower stomach area (abdomen), bladder, ear, or heart. You may need to go to the hospital for treatment if you develop an infection. Call your doctor right away if you develop:
  • fever or chills
  • skin that looks red or swollen and is hot or tender to touch
  • shortness of breath, cough that will not go away
  • severe abdominal pain
  • frequent or urgent need to urinate or a burning feeling when you urinate
• Skin problems such as inflammation of your skin (dermatitis), rash, and eczema. Call your doctor if you have any of the following symptoms that do not go away or get worse: redness, itching, small bumps or patches (rash), your skin is dry or feels like leather, blisters that ooze or become crusty, skin peeling
• Bone, joint, or muscle pain.

Common Jubbonti side effects may include:

• bladder infection (painful or difficult urination)
• lung infection (cough, shortness of breath)
• headache
• back pain, muscle or joint pain
• increased blood pressure
• cold symptoms such as stuffy nose, sneezing, sore throat
• high cholesterol or
• pain in your arms or legs.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.

What should I avoid while receiving Jubbonti?

Follow your doctor's instructions about any restrictions on food, beverages, or activity.

What other drugs will affect Jubbonti?

Other drugs may interact with denosumab, including prescription and over-the-counter medicines, vitamins, and herbal products. Tell your doctor about all other medicines you use.

No formal drug interaction studies have been conducted but interactions with other denosumab products include avoiding:

• calcimimetic drugs, such as cinacalcet, which may worsen hypocalcemia risk
• the use of other drugs associated with ONJ, such as bisphosphonates, which may increase the risk of developing ONJ.

See the prescribing information for a full list of interactions.

Storage

Keep Jubbonti in a refrigerator at 36°F to 46°F (2°C to 8°C) in the original carton. Do not freeze.

Jubbonti may be kept out of the refrigerator for up to 30 days at room temperature [up to 77°F (25°C)] in the original carton to protect from light. Do not keep it at temperatures above 77°F (25°C). Warm temperatures will affect how Jubbonti works.

Do not shake.

Keep Jubbonti and all medicines out of the reach of children.

Ingredients

Active ingredients: denosumab-bbdz

Inactive ingredients: glacial acetic acid, polysorbate 20, sodium hydroxide, sorbitol, and water for
injection (USP). Hydrochloric acid and sodium hydroxide may be added to adjust the pH.  

Manufacturer

Sandoz Inc.

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Further information

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