G-Co-Aspirin 75mg+75mg

G-Co-Aspirin 75mg+75mg

Generic: Clopidogrel + Aspirin

Manufacturer

Gonoshasthaya Pharma Ltd.

৳ 5

Therapeutic Class

Anti-platelet drugs

Storage Conditions

Keep in a cool & dry place (below 30ºC), protected from light & moisture. Keep out of the reach of children.

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Description

Indications

Acute Coronary Syndrome (ACS): G-Co-Aspirin is indicated to reduce the rate of Myocardial Infarction (MI) and Stroke in patients with non-ST-segment elevation ACS [unstable angina (UA)/non-ST-elevation Myocardial Infarction (NSTEMI)] and acute ST-segment elevation ACS [ST-elevation Myocardial Infarction (STEMI)].

Recent MI, recent Stroke, or established Peripheral Arterial Disease: In patients with established peripheral arterial disease or with a history of recent Myocardial Infarction (MI) or recent Stroke it is indicated to reduce the rate of MI and Stroke.

Pharmacology

Clopidogrel is a prodrug. It inhibits platelet activation and aggregation through the irreversible binding of its active metabolite to the P2Y12 class of ADP receptors on platelets. Dose-dependent inhibition of platelet aggregation can be seen at 2 hours after single oral doses. Repeated doses of 75 mg per day inhibit ADP-induced platelet aggregation on the first day, and inhibition reaches steady state between Day 3 and Day 7.

Aspirin inhibits platelet aggregation by irreversible inhibition of platelet cyclooxygenase and thus inhibiting the generation of thromboxane A2 a powerful inducer of platelet aggregation and vasoconstriction.

Pharmacokinetics: After repeated 75-mg oral doses of Clopidogrel (base), plasma concentrations of the parent compound, which has no platelet inhibiting effect, are very low and are generally below the quantification limit (0.00025 mg/L) beyond 2 hours after dosing. Clopidogrel is extensively metabolized by the liver. The main circulating metabolite is the carboxylic acid derivative, and it has no effect on platelet aggregation. It represents about 85% of the circulating drug-related compounds in plasma. Following an oral dose of 14C-labeled Clopidogrel in humans, approximately 50% is excreted in the urine and approximately 46% in the faeces in the 5 days after dosing. The elimination half-life of the main circulating metabolite is 8 hours after single and repeated administration. Administration of Clopidogrel with meals did not significantly modify the bioavailability of Clopidogrel as assessed by the pharmacokinetics of the main circulating metabolite.

Absorption and Distribution: Clopidogrel is rapidly absorbed after oral administration of repeated doses
of 75 mg Clopidogrel (base), with peak plasma levels (3 mg/L) of the main circulating metabolite occurring approximately 1 hour after dosing. The pharmacokinetics of the main circulating metabolite are linear (plasma concentrations increased in proportion to dose) in the dose range of 50 to 150 mg of Clopidogrel.
Absorption is at least 50% based on urinary excretion of Clopidogrel-related metabolites. Clopidogrel and the main circulating metabolite bind reversibly in vitro to human plasma proteins (98% and 94%, respectively). The binding is nonsaturable in vitro up to a concentration of 100 g/mL.

Metabolism and Elimination: In vitro and in vivo, Clopidogrel undergoes rapid hydrolysis into its carboxylic acid derivative. In plasma and urine, the glucuronide of the carboxylic acid derivative is also observed.

Dosage & Administration

The recommended dose of Clopidogrel is 75 mg once daily with or without food. No dosage adjustment is necessary for elderly patients or patients with renal patients. For patients with acute coronary syndrome (unstable angina/non-Q-wave MI), Clopidogrel should be initiated with a single 300 mg loading dose and then continued at 75 mg once daily. Aspirin (75 mg-325 mg once daily) should be initiated and continued in combination with Clopidogrel. In studies it was found that most patients with acute coronary syndrome also received heparin acutely.

Interaction

Study of specific drug interactions yielded the following results:

Aspirin: Aspirin does not modify the Clopidogrel-mediated inhibition of ADP-induced platelet aggregation. Clopidogrel potentiates the effect of aspirin on collagen-induced platelet aggregation.

Heparin: Clopidogrel does not necessitate modification of the heparin dose or alter the effect of heparin on coagulation. Co-administration of heparin has no effect on inhibition of platelet aggregation induced by Clopidogrel.

Nonsteroidal Anti-Inflammatory Drugs (NSAIDs): Concomitant administration of Clopidogrel is associated with increased occult gastrointestinal blood loss. NSAIDs and Clopidogrel should be co-administered with caution.

Warfarin: The safety of the co-administration of Clopidogrel with warfarin has not been established. Consequently, concomitant administration of these two agents should be undertaken with caution.

Contraindications

This combination is contraindicated in the following conditions: Hypersensitivity to the drug substance or any component of the product. Active pathological bleeding such as peptic ulcer or intracranial hemorrhage.

Side Effects

G-Co-Aspirin is generally well tolerated.

Pregnancy & Lactation

There are no adequate and well-controlled studies in pregnant women. It should be used during first and second trimesters of pregnancy only if clearly needed. It is contraindicated during the third trimester of pregnancy. It is unknown whether Clopidogrel is excreted in human breast milk but Aspirin is known to be excreted in human milk. This Drug should be discontinued during the breast feeding.

Precautions & Warnings

  • G-Co-Aspirin may prolongs the bleeding time.
  • Thrombotic thrombocytopenic purpura (TTP): TTP has been reported rarely following use of G-Co-Aspirin.
  • Reye’s syndrome: Reye’s syndrome may develop in individuals who have chicken pox, influenza or flu symptoms. Hypersensitivity including rash, angioedema or hematologic reaction has been reported in patients receiving G-Co-Aspirin or history of hypersensitivity to other thienopyridines

Use in Special Populations

It should not be given to children, particularly those under 12 years, unless the expected benefits outweight the possible risks. Aspirin may be a contributory factor in the causation of Reye’s syndrome in some children.

Overdose Effects

Clopidogrel overdose may lead to bleeding complications. Based on biological plausibility, platelet transfusion may restore clotting ability. In moderate aspirin intoxication dizziness, headache, tinnitus, confusion, and gastrointestinal symptoms may occur which can be treated by inducing vomiting followed by gastric lavage if needed. In severe Aspirin intoxication respiratory alkalosis respiratory acidosis, metabolic acidosis, hyperthermia, perspiration, dehydration can occur. It can be treated with haemodialysis and other symptomatic treatment.

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