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US FDA approves Amgen drug for small cell lung cancer

The drug, marketed under the name Imdelltra, is part of Amgen's pipeline of bispecific antibodies designed to attach to a cancer cell and an immune cell, bringing them together so that the body's immune system can kill the cancer.
Last Updated : 17 May 2024, 01:40 IST
Last Updated : 17 May 2024, 01:40 IST

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The US Food and Drug Administration on Thursday granted accelerated approval to Amgen's tarlatamab, a targeted immunotherapy for adults in the advanced stages of hard-to-treat small cell lung cancer that has worsened despite chemotherapy.

The drug, marketed under the name Imdelltra, is part of Amgen's pipeline of bispecific antibodies designed to attach to a cancer cell and an immune cell, bringing them together so that the body's immune system can kill the cancer.

Results from a mid-stage trial published last year in the New England Journal of Medicine showed that tumors shrank in 40% of patients receiving 10 mg of tarlatamab by intravenous infusion every two weeks.

Amgen said the US price for Imdelltra is $31,500 for the first cycle, and $30,000 for additional infusions. For a year of treatment, the price would come to $781,500.

Patients in the study lived for a median of 14.3 months, compared with a typical survival rate of about five months.

Most lung cancer cases are non-small cell, while up to 15 per cent, according to the American Cancer Society, are the more aggressive small cell variety targeted by Imdelltra.

The disease, which is diagnosed in about 35,000 US patients annually, is "one of most rapidly proliferating and most aggressive cancers there is," Jay Bradner, Amgen's chief scientific officer, said in an interview ahead of the decision.

In clinical trials, the most common side effect of the treatment was cytokine release syndrome, a potentially dangerous condition that occurs when the body's immune system responds over aggressively to infection or immunotherapy drugs.

Amgen said it will need to complete its larger, pivotal trial in advanced small cell lung cancer to receive full FDA approval of the drug.

The company is also testing tarlatamab for treating patients with earlier-stage small cell lung cancer.

If those studies prove successful, Wall Street analysts have said tarlatamab could represent an annual sales opportunity for the company of more than $2 billion.

Shares of Amgen, which fell by less than 1per cent to close at $314.72 on Nasdaq, were unchanged after hours.

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Published 17 May 2024, 01:40 IST

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