Paper I
2019 July (Supplementary) (2010 Scheme) · 40 marks · 120 min

Question

Fibrinolytic drugs

Q53 marksShort Notes

Answer

Fibrinolytic (thrombolytic) drugs dissolve existing thrombi by activating the fibrinolytic system.

Examples

  • Streptokinase, Alteplase (recombinant tPA), Tenecteplase, Reteplase, Urokinase

Mechanism of action

  • Activate plasminogen to plasmin, which degrades fibrin, dissolving the thrombus and restoring blood flow

Uses

  • Acute myocardial infarction (within therapeutic window)
  • Acute ischaemic stroke (within therapeutic window)
  • Massive pulmonary embolism
  • Deep vein thrombosis (selected cases)

Adverse effects

  • Bleeding (including intracranial haemorrhage — most serious)
  • Hypotension, allergic/hypersensitivity reactions (especially streptokinase, which is antigenic)
  • Reperfusion arrhythmias

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