The Food and Drug Administration has granted accelerated approval to avelumab for the treatment of patients with locally advanced or metastatic urothelial carcinoma whose disease progressed during or following platinum-containing chemotherapy or within 12 months of neoadjuvant or adjuvant platinum-containing chemotherapy.
Approval was based on a confirmed overall response rate (ORR) of 16.1% in 26 patients who had been followed for at least 6 months in a single-arm, multicenter study that enrolled 242 patients with locally advanced or metastatic urothelial carcinoma whose disease progressed following platinum-containing neoadjuvant or adjuvant chemotherapy. The ORR was 13.3% among 30 patients who had been followed for at least 13 weeks. Median time to response was 2.0 months (range 1.3-11.0). The median response duration had not been reached in patients followed for at least 13 weeks or at least 6 months, but ranged from 1.4+ to 17.4+ months in both groups, the FDA said in a statement.
Serious adverse reactions, including urinary tract infection/urosepsis, abdominal pain, musculoskeletal pain, creatinine increased/renal failure, dehydration, hematuria/urinary tract hemorrhage, intestinal obstruction/small intestinal obstruction, and pyrexia, were reported in 41% of patients, causing death in 6% of patients. The most common adverse reactions were infusion-related reaction, musculoskeletal pain, nausea, decreased appetite, and urinary tract infection.
The FDA recommended an intravenous infusion of 10 mg/kg over 60 minutes every 2 weeks, and premedication with an antihistamine and acetaminophen prior to the first four infusions of avelumab.
Full prescribing information is available here.
The drug is being marketed as Bavencio by EMD Serono.