Drug ClassThrombolytic
Mechanism* Binds to circulating plasminogen forming activator complex * Converts plasminogen to plasmin * Plasmin lyses fibrin within thrombus
Typical Dose250,000 units then 100,000 units every 1 hour for 24 hours or 1,500,000 units over 1-2 hours
Indications* Acute MI (when PCI is over 2 hours away) * Thromboembolic events: DVT/PE/central retinal thrombosis
Contra-indications* Recent haemorrhage/trauma/surgery * Coagulation defects * Aortic dissection/Aneurysm * Acute pancreatitis
Side-effects* Nausea/vomiting * Bleeding * Hypotension * Allergy * Reperfusion arrhythmia/cerebral oedema
InteractionsWarfarin - increased risk of bleeding duh
Elimination
Additional NotesBody generates antibodies to streptokinase so cannot be used twice in the same year. Should be given within 12 hours of MI, best effect within 3