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Novartis heart drug pelacarsen fails its largest clinical trial

9/5/2026

A closely watched drug for a common heart disease risk factor has failed in its biggest test.

Pelacarsen, developed by Novartis, targets Lp(a), a particle made from lipids and proteins whose elevated concentrations in the blood raise the likelihood of serious cardiac events.

Novartis said Friday the drug showed no benefit over a placebo in the Phase 3 HORIZON trial, a result the company described as a major blow.

What the trial actually showed Phase 3 is the final stage of large-scale clinical testing.

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