The current most updated guidelines state that for UA/NSTEMI patients presenting to the hospital, aspirin should be administered immediately, and if the patient cannot take aspirin, another<unk>  agent, namely clopidogrel or prasugrel (in PCI treated patients) should be given. UA/NSTEMI patients at moderate to high risk who will be undergoing PCI should be given dual<unk><unk>  consisting of aspirin and one of the following; clopidogrel, ticagrelor, eptifibatide and prasugrel, depending on whether the second agent is given before or during PCI. Addtional situation specific guidelines are given below.
Unstable angina/NSTEMI Antiplatelet therapy recommendations
Chronic stable angina treatment anti-lipid agents
Chronic stable angina treatment aspirin
Chronic stable angina treatment clopidogrel
Chronic stable angina treatment lipid management
Chronic stable angina risk stratification coronary angiography
Chronic stable angina treatment calcium channel blockers
Chronic stable angina treatment angiotensin converting enzyme inhibitors 