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                464                      Cardio Diabetes Medicine 2017







                                When To Use ? When Not To Use ?

                                                   -Antiplatelets.






                                               Prof.A.S.Mohan,  M.D.,F.I.C.P.,
                                                   Professor & HOD, Medicine
                                      Tirunelveli Medical College, Tirunelveli, Tamilnadu, India





              The platelet is integral to the initiation of thrombosis.   •   Adenosine reuptake inhibitors
              Drugs that affect platelet function are a fundamental   •  Dipyridamole
              part  of primary  and secondary  management  of
              atherosclerotic thrombotic  disease.  As reviewed  in   •   Thromboxane inhibitors
              various guideline  documents,  authoritative  reviews,   •   Thromboxane synthase inhibitors
              and meta-analyses, the indications  for  the use of
              antiplatelet drugs in the management of thrombotic   •   Thromboxane receptor antagonists
              diseases include stroke, acute myocardial infarction   •  Terutroban
              (AMI),acute  coronary   syndrome   (ACS),angina,
              percutaneous coronary  intervention (PCI), cardiac   Uses Of Antiplatelet Agents :
              surgery,  primary   and  secondary cardiovascular
              disease prevention, peripheral vascular disease, and   Prevention and treatment of arterial
              thrombotic disorders such as atrial fibrillation.
                                                                 thrombosis
              There are several anti platelet drugs available for use   Prevention and treatment  of  arterial  thrombosis  is
              in clinical practice and several under trial .                       essential in patients with certain medical conditions
                                                                 whereby the risk of thrombosis or thromboembolism
              Classification of antiplatelet drugs               may result in disastrous consequences such as heart
              •    Irreversible cyclooxygenase inhibitors        attack, pulmonary embolism or stroke. Patients who
                                                                 require the use of antiplatelet drugs are: stroke with or
              •    Aspirin, Triflusal
                                                                 without atrial fibrillation, any heart surgery (especially
              •    Adenosine    diphosphate   (ADP)   receptor   prosthetic replacement  heart valve),  Coronary  Heart
                   inhibitors                                    Disease such as stable angina, unstable angina and
                                                                 heart attack, patients with coronary stent, Peripheral
              •    Clopidogrel , Prasugrel , Ticagrelor , Ticlopidine
                                                                 Vascular Disease/Peripheral  Arterial  Disease  and
              •    Phosphodiesterase inhibitors                  apical/ventricular/mural thrombus.
              •    Cilostazol                                    Treatment of established arterial thrombosis includes
              •    Protease-activated     receptor-1    (PAR-1)  the use of antiplatelet drugs and thrombolytic therapy.
                   antagonists                                   Antiplatelet drugs  alter the  platelet activation  at  the
                                                                 site of vascular damage crucial to the  development
              •    Vorapaxar                                     of arterial thrombosis.
              •    Glycoprotein IIB/IIIA inhibitors (intravenous use   Asprin:
                   only)
                                                                 Irreversibly  inhibits  the enzyme COX,  resulting  in
              •    Abciximab , Eptifibatide, Tirofiban
                                                                 reduced platelet production of TXA2 (thromboxane -
                                                                 powerful vasoconstrictor that lowers cyclic AMP and
                                                                 initiates the platelet release reaction).



                                                         GCDC 2017
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