Clopidogrel and [symbol: see text] ticlopidine--improvements on aspirin? 1999


Clopidogrel (Plavix-Sanofi Winthrop/Bristol-Myers Squibb) and [symbol: see text] ticlopidine (Ticlid-Sanofi Winthrop) are inhibitors of platelet function and are promoted as potential alternatives to aspirin. Clopidogrel is licensed for the secondary prevention of vascular events in patients with established atherosclerotic disease. The manufacturer claims that clopidogrel is "significantly more effective at reducing myocardial infarction, stroke and vascular death" compared to aspirin. Ticlopidine is licensed as an alternative to aspirin for secondary prevention of stroke and coronary complications in patients with intermittent claudication. However, in the UK, ticlopidine is more commonly used with aspirin to prevent complications following insertion of coronary stents during angioplasty. We consider whether the claims for clopidogrel and the current use of ticlopidine are justified.

UI MeSH Term Description Entries
D010975 Platelet Aggregation Inhibitors Drugs or agents which antagonize or impair any mechanism leading to blood platelet aggregation, whether during the phases of activation and shape change or following the dense-granule release reaction and stimulation of the prostaglandin-thromboxane system. Antiaggregants, Platelet,Antiplatelet Agent,Antiplatelet Agents,Antiplatelet Drug,Blood Platelet Aggregation Inhibitor,Blood Platelet Antagonist,Blood Platelet Antiaggregant,PAR-1 Antagonists,Platelet Aggregation Inhibitor,Platelet Antagonist,Platelet Antagonists,Platelet Antiaggregant,Platelet Antiaggregants,Platelet Inhibitor,Protease-Activated Receptor-1 Antagonists,Antiplatelet Drugs,Blood Platelet Aggregation Inhibitors,Blood Platelet Antagonists,Blood Platelet Antiaggregants,Platelet Inhibitors,Agent, Antiplatelet,Aggregation Inhibitor, Platelet,Antagonist, Blood Platelet,Antagonist, Platelet,Antiaggregant, Blood Platelet,Antiaggregant, Platelet,Drug, Antiplatelet,Inhibitor, Platelet,Inhibitor, Platelet Aggregation,PAR 1 Antagonists,Platelet Antagonist, Blood,Platelet Antiaggregant, Blood,Protease Activated Receptor 1 Antagonists
D002318 Cardiovascular Diseases Pathological conditions involving the CARDIOVASCULAR SYSTEM including the HEART; the BLOOD VESSELS; or the PERICARDIUM. Adverse Cardiac Event,Cardiac Events,Major Adverse Cardiac Events,Adverse Cardiac Events,Cardiac Event,Cardiac Event, Adverse,Cardiac Events, Adverse,Cardiovascular Disease,Disease, Cardiovascular,Event, Cardiac
D000075202 Contraindications A condition or factor associated with a recipient that makes the use of a drug, procedure, or physical agent improper or inadvisable. Contraindications may be absolute (life threatening) or relative (higher risk of complications in which benefits may outweigh risks). Contraindications, Physical Agent,Medical Contraindications,Agent Contraindication, Physical,Agent Contraindications, Physical,Contraindication,Contraindication, Medical,Contraindication, Physical Agent,Contraindications, Medical,Medical Contraindication,Physical Agent Contraindication,Physical Agent Contraindications
D000077144 Clopidogrel A ticlopidine analog and platelet purinergic P2Y receptor antagonist that inhibits adenosine diphosphate-mediated PLATELET AGGREGATION. It is used to prevent THROMBOEMBOLISM in patients with ARTERIAL OCCLUSIVE DISEASES; MYOCARDIAL INFARCTION; STROKE; or ATRIAL FIBRILLATION. Clopidogrel Besilate,Clopidogrel Besylate,Clopidogrel Bisulfate,Clopidogrel Hydrochloride,Clopidogrel Napadisilate,Clopidogrel Sandoz,Clopidogrel, (+)(S)-isomer,Clopidogrel-Mepha,Iscover,PCR 4099,PCR-4099,Plavix,SC 25989C,SC 25990C,SR 25989,Clopidogrel Mepha
D001241 Aspirin The prototypical analgesic used in the treatment of mild to moderate pain. It has anti-inflammatory and antipyretic properties and acts as an inhibitor of cyclooxygenase which results in the inhibition of the biosynthesis of prostaglandins. Aspirin also inhibits platelet aggregation and is used in the prevention of arterial and venous thrombosis. (From Martindale, The Extra Pharmacopoeia, 30th ed, p5) Acetylsalicylic Acid,2-(Acetyloxy)benzoic Acid,Acetysal,Acylpyrin,Aloxiprimum,Colfarit,Dispril,Easprin,Ecotrin,Endosprin,Magnecyl,Micristin,Polopirin,Polopiryna,Solprin,Solupsan,Zorprin,Acid, Acetylsalicylic
D013988 Ticlopidine An effective inhibitor of platelet aggregation commonly used in the placement of STENTS in CORONARY ARTERIES. 53-32C,Ticlid,Ticlodix,Ticlodone,Ticlopidine Hydrochloride,53 32C,5332C,Hydrochloride, Ticlopidine
D015607 Stents Devices that provide support for tubular structures that are being anastomosed or for body cavities during skin grafting. Stent
D016032 Randomized Controlled Trials as Topic Works about clinical trials that involve at least one test treatment and one control treatment, concurrent enrollment and follow-up of the test- and control-treated groups, and in which the treatments to be administered are selected by a random process, such as the use of a random-numbers table. Clinical Trials, Randomized,Controlled Clinical Trials, Randomized,Trials, Randomized Clinical

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