An Incredible Discovery Story Leading to a First-of-Its-Kind Treatment Option

On April 9, 2019, the U.S. Food and Drug Administration (FDA) approved EVENITY™ (romosozumab-aqqg) for the treatment of osteoporosis in postmenopausal women at high risk for fracture. EVENITY™ is the first and only bone builder with a dual effect that both increases bone formation and to a lesser extent reduces bone resorption (or bone loss) to rapidly reduce the risk of vertebral fracture within12 months.

View the news release here.

The story of EVENITY’s discovery and development is truly a unique one, involving NASA, mice in space and nearly three decades of research. It began with diligent research that identified a new gene, which turned out to be the underlying cause of a genetic condition that results in bone overgrowth – sclerosteosis.1

At first glance, sclerosteosis and osteoporosis couldn’t seem more different since sclerosteosis patients don’t produce sclerostin and their bones are thicker and stronger than normal,2 while osteoporosis patients have bones that become weak and brittle.3 However, these new findings regarding the cause of sclerosteosis uncovered a potential treatment option for postmenopausal women with osteoporosis.

Learn more about EVENITY’s discovery in this video:

Important U.S. Product Information

EVENITY™ is indicated for the treatment of osteoporosis in postmenopausal women at high risk for fracture, defined as a history of osteoporotic fracture, or multiple risk factors for fracture; or patients who have failed or are intolerant to other available osteoporosis therapy.

The anabolic effect of EVENITY™ wanes after 12 monthly doses of therapy. Therefore, the duration of EVENITY™ use should be limited to 12 monthly doses. If osteoporosis therapy remains warranted, continued therapy with an antiresorptive agent should be considered.

Important U.S. Safety Information


EVENITY™ may increase the risk of myocardial infarction, stroke and cardiovascular death. EVENITYTM should not be initiated in patients who have had a myocardial infarction or stroke within the preceding year. Consider whether the benefits outweigh the risks in patients with other cardiovascular risk factors. Monitor for signs and symptoms of myocardial infarction and stroke and instruct patients to seek prompt medical attention if symptoms occur. If a patient experiences a myocardial infarction or stroke during therapy, EVENITY™ should be discontinued.

In a randomized controlled trial in postmenopausal women, there was a higher rate of major adverse cardiac events (MACE), a composite endpoint of cardiovascular death, nonfatal myocardial infarction and nonfatal stroke, in patients treated with EVENITY™ compared to those treated with alendronate.

Contraindications: EVENITY™ is contraindicated in patients with hypocalcemia. Pre-existing hypocalcemia must be corrected prior to initiating therapy with EVENITY™. EVENITY™ is contraindicated in patients with a history of systemic hypersensitivity to romosozumab or to any component of the product formulation. Reactions have included angioedema, erythema multiforme, and urticaria.

Hypersensitivity: Hypersensitivity reactions, including angioedema, erythema multiforme, dermatitis, rash, and urticaria have occurred in EVENITY™-treated patients. If an anaphylactic or other clinically significant allergic reaction occurs, initiate appropriate therapy and discontinue further use of EVENITY™.

Hypocalcemia: Hypocalcemia has occurred in patients receiving EVENITY™. Correct hypocalcemia prior to initiating EVENITY™. Monitor patients for signs and symptoms of hypocalcemia, particularly in patients with severe renal impairment or receiving dialysis. Adequately supplement patients with calcium and vitamin D while on EVENITY™. 

Osteonecrosis of the Jaw (ONJ): ONJ, which can occur spontaneously, is generally associated with tooth extraction and/or local infection with delayed healing, and has been reported in patients receiving EVENITY™. A routine oral exam should be performed by the prescriber prior to initiation of EVENITY™. Concomitant administration of drugs associated with ONJ (chemotherapy, bisphosphonates, denosumab, angiogenesis inhibitors, and corticosteroids) may increase the risk of developing ONJ. Other risk factors for ONJ include cancer, radiotherapy, poor oral hygiene, pre-existing dental disease or infection, anemia, and coagulopathy.

For patients requiring invasive dental procedures, clinical judgment should guide the management plan of each patient. Patients who are suspected of having or who develop ONJ should receive care by a dentist or an oral surgeon. In these patients, dental surgery to treat ONJ may exacerbate the condition. Discontinuation of EVENITY™ should be considered based on benefit-risk assessment.

Atypical Femoral Fractures: Atypical low-energy or low trauma fractures of the femoral shaft have been reported in patients receiving EVENITY™. Causality has not been established as these fractures also occur in osteoporotic patients who have not been treated.

During EVENITY™ treatment, patients should be advised to report new or unusual thigh, hip, or groin pain. Any patient who presents with thigh or groin pain should be evaluated to rule out an incomplete femur fracture. Interruption of EVENITY™ therapy should be considered based on benefit-risk assessment.

Adverse Reactions: The most common adverse reactions (≥ 5%) reported with EVENITY™ were arthralgia and headache.

EVENITY™ is a humanized monoclonal antibody. As with all therapeutic proteins, there is potential for immunogenicity.

Please see accompanying EVENITY™ full Prescribing Information, including Medication Guide.


  1. Brunkow ME, Gardner JC, Van Ness J, et al. Bone dysplasia sclerosteosis results from loss of the SOST gene product, a novel cystine knot-containing protein. Am J Hum Genet. 2001;68(3):577-89. Accessed March 26, 2019.
  2. NIH Genetics Home Reference. Accessed March 26, 2019.
  3. NOF. What is Osteoporosis and What Causes It? Accessed March 26, 2019.

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