title: [Antiaggregation: aspirin].
abstract: Many randomized trials have shown aspirin as an effective antiplatelet drug for the secondary prevention of cardiovascular events. The NNT (number needed to treat) to prevent 1 vascular event is about 25. The NNH (number needed to harm) inducing one cerebral bleeding is about 1'000, to provoke one severe extracerebral bleeding about 100-200. The primary prevention can be recommended only for high risk patients for cardiovascular events (annual risk of 1-1.5% or more), calculated on the basis of the Framingham data, the Sheffield tables or in analysis of U.S. Preventive Services Task Force. The mechanisms of action, interactions and the "aspirin-resistance" are briefly discussed.
authors.affiliation: Departement Innere Medizin, Kantonsspital Baden. adrian.eichenberger@ksb.ch
authors.forename: A
authors.initials: A
authors.lastname: Eichenberger
authors.forename: L
authors.initials: L
authors.lastname: Pontiggia
authors.forename: J H
authors.initials: JH
authors.lastname: Beer
mesh_terms: D000284:Administration, Oral; D000328:Adult; D000367:Age Factors; D000368:Aged; D000925:Anticoagulants / Q000008:administration & dosage / Q000627:therapeutic use; D001241:Aspirin / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D002318:Cardiovascular Diseases / Q000517:prevention & control; D048909:Diabetes Complications; D003920:Diabetes Mellitus / Q000188:drug therapy; D004347:Drug Interactions; D004359:Drug Therapy, Combination; D005260:Female; D005343:Fibrinolytic Agents / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D006470:Hemorrhage / Q000139:chemically induced; D006801:Humans; D008297:Male; D010975:Platelet Aggregation Inhibitors / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D011322:Primary Prevention; D016032:Randomized Controlled Trials as Topic; D012307:Risk Factors; D013997:Time Factors
chemical_list: D000925:Anticoagulants; D005343:Fibrinolytic Agents; D010975:Platelet Aggregation Inhibitors; D001241:Aspirin