Product Information
Registration Status: InactiveTHIS PRODUCT HAS BEEN DEREGISTERED!
TACRON TABLET 250mg is approved to be sold in Singapore with effective from 1995-08-25. It is marketed by ZIWELL MEDICAL (S) PTE LTD, with the registration number of SIN08311P.
This product contains Ticlopidine 250mg in the form of TABLET, SUGAR-COATED. It is approved for ORAL use.
This product is manufactured by KOREA UNITED PHARMACEUTICAL INC in KOREA, and in REPUBLIC OF.
It is a Prescription Only Medicine that can only be obtained from a doctor or a dentist, or a pharmacist with a prescription from a Singapore-registered doctor or dentist.
Description
Ticlopidine is an effective inhibitor of platelet aggregation. It is a prodrug that is metabolised to an active form, which blocks the ADP receptor that is involved in GPIIb/IIIa receptor activation leading to platelet aggregation. Ticlopidine is marketed under the brand name Ticlid and is indicated for patients who cannot take aspirin or in whom aspirin has not worked to prevent a thrombotic stroke. The FDA label includes a black-box warning of neutropenia, aplastic anemia, thrombotic thrombocytopenia purpura, and agranulocytosis, so it is necessary to monitor patients' WBC and platelets when they are taking ticlopidine.
Indication
Used in patients, who have had a stroke or stroke precursors and who cannot take aspirin or aspirin has not worked, to try to prevent another thrombotic stroke.
Mechanism of Action
The active metabolite of ticlopidine prevents binding of adenosine diphosphate (ADP) to its platelet receptor, impairing the ADP-mediated activation of the glycoprotein GPIIb/IIIa complex. It is proposed that the inhibition involves a defect in the mobilization from the storage sites of the platelet granules to the outer membrane. No direct interference occurs with the GPIIb/IIIa receptor. As the glycoprotein GPIIb/IIIa complex is the major receptor for fibrinogen, its impaired activation prevents fibrinogen binding to platelets and inhibits platelet aggregation. By blocking the amplification of platelet activation by released ADP, platelet aggregation induced by agonists other than ADP is also inhibited by the active metabolite of ticlopidine.
Pharmacokinetics
- Absorption
- Absorption is greater than 80%. Food increases absorption by approximately 20%.
- Distribution
- The volume of distribution was not quantified.
- Metabolism
- Ticlopidine is metabolized extensively by the liver with only trace amounts of intact drug detected. At least 20 metabolites have been identified.
- Elimination
Clearance
Ticlopidine clearance was not quantified, but clearance decreases with age.
Toxicity
Single oral doses of ticlopidine at 1600 mg/kg and 500 mg/kg were lethal to rats and mice, respectively. Symptoms of acute toxicity were GI hemorrhage, convulsions, hypothermia, dyspnea, loss of equilibrium and abnormal gait. The FDA label includes a black-box warning of neutropenia, aplastic anemia, thrombotic thrombocytopenia purpura, and agranulocytosis, so it is necessary to monitor patients' WBC and platelets when they are taking ticlopidine.
Active Ingredient/Synonyms
Ticlopidina | Ticlopidinum | Ticlopidine |
Source of information: Drugbank (External Link). Last updated on: 3rd July 18. *Trade Name used in the content below may not be the same as the HSA-registered product.