GPI have been studied extensively in patients with non-STsegment elevation myocardial infarctions (NSTEMI) with planned or performed PCI. In STEMI tirofiban and and eptifibatide are less well investigated, and only abciximab is recommended in primary PCI, but the long term benefits require more investigation. In PCI randomized controlled clinical trials (RCT's) abciximab consistently showed a significant reduction in the rate of myocardial infarction and the need for urgent revascularization. Abciximab has been evaluated in 5 RCT's in association with primary PCI. The pooled analysis for the clinical outcome at 30 days, demonstrate a significant reduction of death, re- infarction and target vessel revascularization (TVR), mainly due to a reduction of repeat intervention. The long-term benefits require more investigation.