PLATO (PLATelet Inhibition and Patient Outcomes) was a large (18,624 patients in 43 countries), head-to-head patient outcomes study of BRILINTA versus clopidogrel, both given in combination with aspirin and other standard therapy. The study was designed to establish whether BRILINTA could achieve a clinically meaningful reduction in cardiovascular (CV) events in patients with ACS, above and beyond that afforded by clopidogrel. Patients were treated for at least 6 months and up to 12 months.
PLATO demonstrated that treatment with BRILINTA led to a significantly greater reduction in the primary end point – a composite of CV death, MI, or stroke – compared to patients who received clopidogrel (9.8% vs 11.7% at 12 months; 1.9% absolute risk reduction [ARR]; 16% relative risk reduction [RRR]; 95% CI, 0.77 to 0.92; P<0.001). The difference in treatments was driven by CV death and MI with no difference in stroke. In PLATO, the absolute difference in treatment benefit versus clopidogrel was seen at 30 days and the Kaplan-Meier survival curves continued to diverge throughout the 12-month treatment period.
The PLATO study also demonstrated that treatment with BRILINTA for 12 months was associated with a 21% RRR in CV death (4% vs 5.1%; 1.1% ARR; P=0.001) and a 16% RRR in MI compared to clopidogrel at 12 months (5.8% vs 6.9%; 1.1% ARR; P<0.005).The primary safety end point in the PLATO study was Total Major Bleeding (11.6% for BRILINTA and 11.2% for clopidogrel). In PLATO, non-CABG major + minor bleeding events were more common with BRILINTA versus clopidogrel (8.7% vs 7% respectively). The rate of non–CABG-related major bleeding was higher for BRILINTA (4.5%) vs clopidogrel (3.8%). Dyspnea was reported in 14% of patients treated with BRILINTA and in 8% of patients treated with clopidogrel. Dyspnea was usually mild to moderate in intensity and often resolved during continued treatment.
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