CLOPIDOGREL BISULFATE  (clo-pi'do-grel)  Plavix Classifications: anticoagulants; antiplatelet agent; Therapeutic: anticoagulants; antiplatelet agent Pregnancy Category: B
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Availability
75 mg tablets
Action
Inhibits platelet aggregation by selectively preventing the binding of adenosine diphosphate to its platelet receptor. It
is an analog of ticlopidine. The drug's effect on the adenosine diphosphate receptor of a platelet is irreversible.
Therapeutic Effect
Clopidogrel prolongs bleeding time, thereby reducing atherosclerotic events in high-risk patients.
Uses
Acute coronary syndrome (ST or non-ST elevations). Secondary prevention of MI, stroke, and vascular death in patients with
recent MI, stroke, unstable angina or established peripheral arterial disease.
Unlabeled Uses
Reduction of restenosis after stent placement.
Contraindications
Hypersensitivity to clopidogrel; intracranial hemorrhage, peptic ulcer, or any other active pathologic bleeding. Discontinue
clopidogrel 7 d before surgery and during lactation. Safety and efficacy not established in children.
Cautious Use
Concurrent use with drugs that might induce gastrointestinal bleeding; GI bleeding, peptic ulcer disease; hepatic impairment
(moderate to severe); severe renal impairment; patients at risk for increased bleeding; pregnancy (category B).
Route & Dosage
Secondary Prevention Adult: PO 75 mg q.d.
Acute Coronary Syndrome (Non-ST Elevation) Adult: PO 300 mg loading dose then 75 mg q.d. (use with aspirin)
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Administration
Oral
- Do not administer to persons with active pathologic bleeding.
- Discontinue drug 7 d prior to surgery.
- Store at 15°30° C (59°86° F) in tightly closed container and protect from light.
Adverse Effects (≥1%)
Body as a Whole: Flu-like
syndrome,
fatigue, pain,
arthralgia, back pain.
CV: Chest pain, edema, hypertension, thrombocytopenic purpura.
GI: Abdominal pain, dyspepsia,
diarrhea, nausea, hypercholesterolemia.
Hematologic: Thrombotic thrombocytopenic purpura, epistaxis.
CNS: Headache, dizziness,
depression.
Respiratory: URI,
dyspnea, rhinitis,
bronchitis, cough.
Skin: Rash, pruritus.
Interactions
Drug: nsaids may increase risk of bleeding events.
Herbal: Garlic, ginger, ginkgo may increase risk of bleeding.
Pharmacokinetics
Absorption: Rapidly absorbed from GI tract.
Onset: 2 h; reaches steady state in 37 d.
Distribution: 9498% protein bound.
Metabolism: Rapidly hydrolyzed in
plasma to active
metabolite.
Elimination: 50% in urine and 50% in feces.
Half-Life: 8 h.
Nursing Implications
Assessment & Drug Effects
- Carefully monitor for and immediately report S&S of GI bleeding, especially when coadministered with NSAIDs, aspirin, heparin, or warfarin.
- Lab tests: Periodic platelet count and lipid profile.
- Evaluate patients with unexplained fever or infection for myelotoxicity.
Patient & Family Education
- Report promptly any unusual bleeding (e.g., black, tarry stools).
- Avoid chronic aspirin or NSAID use unless approved by physician.