Drug Interaction:
Anticoagulants -
Anticoagulants such as heparin Vitamin K antagonists and drugs that alter platelet function
( such as acetylsalicylic acid, dipyridamole and GP IIb and IIIa inhibitors) may increase the risk
of bleeding if administered prior to , during or after tenecteplase therapy
Drug/Lab test Interaction-
during tenecteplase therapy, results of coagulation tests and/or measures of fibronolytic
activity may be unreliable unless specific precautions are taken to prevent in vitro artifacts
Indication:
Acute myocardial Infarction AMI
Adverse Reaction:
Allergic reactions- anaphylaxis, angioedema, laryngeal edema, rash, urticaria, <1% reported
Hematologic- most frequent - bleeding. serious bleeding may occur. Death or permanent
disability can occur in patients in patients who experience stroke or serious
bleeding episodes.
Miscellaneous- cardiogenic shock, arrhythmias, atrioventricular block, pulmonary edema,
heart failure, cardiac arrest, recurrent myocardial ischemia,
myocardial reinfarction, myocardial rupture, cadiac tamponade, percarditis
pericardial effusion, mitrial regurgitation, thrombosis. embolism and
electromechanical disassociation
Nausea, vomiting, hypotension and fever have been reported
Contra-Indications:
Contraindicated in patients with acute myocardial infarction
Special Precaution-
Bleeding- should serious bleeding occur any concomittant heparin or anticoagulant should be
discontinued immediately
High risk patients- each patient should be carefully evaluated and anticipated benefits weighed
against potential risks associated with therapy.
Cholesterol embolization - has been reported rarely.This serious condition which can be lethal ,
is also associated with invasive vascular procedures eg cardiac catherization, angiography,
vascular surgery.
Arrhythmias- it is recommended that antiarrhythmic therapy for bradycadia and/or vascular
irritability be available when tenecteplase is adminstered
Pregnancy- tenecteplase should be given to pregnant women only if potential benefit outweigh
the potential risk to the fetus.
Lactation- excercise caution when tenecteplase is adminstered to a breast-feeding woman
Children- the safety and efficacy of tenecteplase in children have not been established
Elderly- the benefits of tenecteplase on mortality should be carefully weighed against the increased
risks of advere events, including bleeding
Dosages/ Overdosage Etc:
Indication-
Acute myocardial Infarction AMI
Dosage-
Teneceplase is for intervenous administration only
Recomended daily dose should not exceed 50mg and is based on patients weight.
A single bolus dose should be administered over 5 seconds based on patients weight .
The treatment should be initiated as soon as possible after the onset of AMI symptoms
Pharmacology/ Pharmacokinetics:
Pharmacology-
Tenecteplase is a modified form of human tissue plasminogen activator tPA that binds fibrin
and converts plasminogen to plasmin . In the presence of fibrin, in vitro studies demonstrates
that tenecteplase conversion of plasmonogen to plasmin is incresed relative to its conversion
in the absence of fibrin.
Pregnancy and lactation:
Pregnancy-
Tenecteplase should be given to pregnant women only if potential benefit outweigh
the potential risk to the fetus.
Lactation-
Excercise caution when tenecteplase is adminstered to a breast-feeding woman
Children-
The safety and efficay of tenecteplase in children have not been established
Elderly-
The benefits of tenecteplae on mortality should be carefully weighed against the increased
risks of advere events. including bleeding