Roche's Tecentriq nabs a solo OK in first-line lung cancer. But will it gain traction?

tecentriq
Roche's Tecentriq will join Merck's Keytruda as a solo therapy approved for first-line lung cancer. (Roche)

It was a long run, but Merck & Co.’s Keytruda finally has some head-to-head company in the previously untreated non-small cell lung cancer (NSCLC) department. Whether that company represents any real threat to Keytruda's monotherapy market share, however, remains to be seen.

The FDA Monday greenlighted Roche’s Tecentriq on its own for newly diagnosed, metastatic patients without EGFR or ALK mutations whose tumors bear levels of biomarker PD-L1 registering 50% or greater. It’ll join Keytruda—the only other member of the PD-1/PD-L1 class with an approval in this indication—on the market, where the Merck drug has been amassing share since October 2016.

RELATED: ESMO: Is Roche's new Tecentriq data a match for Keytruda's 'lead and loyalty' in lung cancer?

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Regulators based the go-ahead on data showing Tecentriq could extend patients’ lives by an additional 7.1 months compared with chemo; those enrolled in the Tecentriq arm of the phase 3 Impower110 trial saw their lives lengthened by a median 20.2 months, versus 13.1 months for those receiving chemo.

Of course, chemo is no longer the standard of care, as it was when Roche started the study. It’s been displaced by Keytruda, either alone or in tandem with chemo for those who can tolerate it. Analysts have argued that solo Keytruda’s performance in patients with low PD-L1 levels would leave room for a competitor to step in and steal share, but with the Roche drug's PD-L1-specific nod, it won’t be Tecentriq.

RELATED: ASCO: Merck's solo Keytruda wins again, but might just leave room for competition

“The lead and loyalty for Keytruda among oncologists treating NSCLC are strong,” SVB Leerink analyst Daina Graybosch wrote to clients last September, noting that the Roche med likely wouldn’t make much of a dent in Keytruda’s “sales and dominance” in the near term, grabbing 15% or less of the drug's market share.

But Tecentriq could prove a thorn in Merck’s side down the road, she reasoned, now that “companies with novel agents now have two options … to collaborate with in 1L NSCLC.”

RELATED: Bristol Myers Squibb finally breaks into first-line lung cancer with Opdivo-Yervoy nod

Meanwhile, though, there’s another new chemo-free option on the scene after Friday’s OK for Bristol Myers Squibb’s Opdivo-Yervoy combo. That pairing showed last fall that it could cut the risk of death among PD-L1 positive patients by 21% compared with chemo.

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