Enhanced onset of platelet inhibition with a loading dose of ticlopidine in ASA-treated stable coronary patients

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Microfluidics in Assessing Platelet Function
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U Berglund1, T Lindahl

  • 1Department of Cardiology, University Hospital, Linköping, Sweden.

International Journal of Cardiology
|August 4, 1998
PubMed

Insights

A loading dose of ticlopidine, combined with aspirin, significantly enhances antiplatelet effects compared to standard dosing. This approach may reduce complications associated with coronary angioplasty and stenting procedures.

Area of Science:

  • Cardiology
  • Pharmacology
  • Thrombosis

Background:

  • Antiplatelet therapy is crucial for managing complications after coronary angioplasty.
  • Ticlopidine, alongside aspirin (ASA), improves outcomes post-coronary stenting, yet early complications persist.
  • Standard ticlopidine administration exhibits a delayed onset of action.

Purpose of the Study:

  • To evaluate the efficacy of a ticlopidine loading dose versus standard treatment in ASA-treated patients.
  • To assess the impact of a loading dose on platelet inhibition before coronary procedures.

Main Methods:

  • Randomized trial involving 18 stable coronary patients pre-treated with ASA.
  • Comparison of standard ticlopidine (250 mg BID) versus a loading dose (1500 mg) followed by standard dosing.
  • Assessment of antiplatelet effect via ADP-induced platelet fibrinogen binding after one day.

Main Results:

  • Standard ticlopidine showed minimal antiplatelet effect after one day.
  • The ticlopidine loading dose regimen achieved significantly greater platelet inhibition (24.9-35.3% vs. 5.6-10.6%, p<0.005).
  • Loading dose resulted in superior inhibition at lower final ADP concentrations.

Conclusions:

  • A loading dose of ticlopidine provides more potent and rapid platelet inhibition than standard dosing.
  • Administering a ticlopidine loading dose the day before angioplasty may mitigate procedural complications.
  • This strategy holds promise for improving safety in coronary interventions.

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