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Latest & greatest articles for clopidogrel
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Validation of the DAPT score in patients randomized to 6 or 12 months clopidogrel after predominantly second-generation drug-eluting stents The DAPT score is a recently-proposed decision tool for guiding optimal duration of dual antiplatelet therapy (DAPT). It showed modest accuracy in prior derivation and validation cohorts of patients with ≥12 months DAPT. This study was aimed to evaluate the validity of the DAPT score in a cohort of patients with 6 or 12 months DAPT after implantation
Eight-year follow-up of the Clopidogrel After Surgery for Coronary Artery Disease (CASCADE) trial In this 8 years' follow-up study, we evaluated the long-term outcomes of the addition of clopidogrel to aspirin during the first year after coronary artery bypass grafting, versus aspirin plus placebo, with respect to survival, major adverse cardiac, or major cerebrovascular events, including revascularization, functional status, graft patency, and native coronary artery disease progression.In (...) the initial Clopidogrel After Surgery for Coronary Artery Disease trial, 113 patients were randomized to receive either daily clopidogrel (n = 56) or placebo (n = 57), in addition to aspirin, in a double-blind fashion for 1 year after coronary artery bypass grafting. All patients were re-evaluated to collect long-term clinical data. Surviving patients with a glomerular filtration rate > 30 mL/min were asked to undergo a coronary computed tomography angiogram to evaluate the late saphenous vein graft
Clopidogrel-Induced Insulin Autoimmune Syndrome: A Newly Recognized Cause of Hypoglycemia in a Patient Without Diabetes Insulin autoimmune syndrome (IAS), defined as hyperinsulinemic hypoglycemia with high titers of anti-insulin antibodies, is frequently reported in Japanese patients but rarely observed in whites. We report in this study on a 79-year-old white male without diabetes who developed IAS following exposure to clopidogrel, a drug not previously known to cause hypoglycemia (...) to have HLA-DRB1*0404, a feature often reported in Japanese patients with IAS. Three weeks prior to symptom onset, he was started on clopidogrel, a drug that does not have a sulfhydryl group, but its active metabolite does. Clopidogrel was switched to a nonsulfhydryl antiplatelet agent, and glucocorticoid therapy was initiated. Shortly thereafter, the frequency of hypoglycemic episodes decreased, and glucocorticoids were tapered over the ensuing 3 months. No hypoglycemic episodes were noted during 6
Clopidogrel loading dose versus maintenance dose to treat patients with acute ischaemic stroke in China (CLASS-China): results from a prospective double-blind randomised clinical trial The role of clopidogrel in treating patients with acute ischaemic stroke is unclear. We have conducted the clinical trial in order to evaluate the efficacy and safety of clopidogrel with a loading dose in treating patients with non-cardiogenic acute ischaemic stroke.Clopidogrel loading dose versus maintenance (...) early due to slow enrolment, loading dose of clopidogrel does not reduce the risk of recurrent stroke. Future trials with sufficient number of patients enrolled are needed to re-examine this hypothesis.
Clopidogrel reloading for patients with acute myocardial infarction already on clopidogrel therapy We sought to determine the association of clopidogrel reloading with in-hospital bleeding and mortality in contemporary practice.We examined clopidogrel reloading for ST-segment elevation myocardial infarction (STEMI) and non-ST-segment elevation myocardial infarction (NSTEMI) patients on pre-admission clopidogrel therapy in the ACTION Registry-GWTG from 2009 to 2014. We used inverse probability (...) weighted propensity adjustment to compare in-hospital mortality and major bleeding risks between patients reloaded in the first 24 h with ≥300 mg of clopidogrel vs. those continued on a maintenance (<300 mg) dose. Among the 12 366 patients on pre-admission clopidogrel therapy who were admitted with STEMI, 9369 (75.8%) received a loading dose. Of 39 158 patients with NSTEMI, 10 144 (25.9%) were reloaded. Reloaded patients were younger, had fewer comorbid conditions, and were more likely to be treated
Effect of clopidogrel on the hydroxylation and sulfoxidation of omeprazole: A single dose study in healthy human volunteers Based upon the known potential interaction between omeprazole (OMP) and clopidogrel (CLOP), the current study was designed to evaluate the effect of CLOP on disposition of OMP and its two major metabolites, 5-hydroxyomeprazole (5-OH-OMP) and omeprazole sulfone (OMP-S) in healthy clinical subjects. A randomized, open label, 2-period, crossover study was designed. Twelve
Clopidogrel and Proton Pump Inhibitor Use: A Review of the Evidence on Safety Clopidogrel and Proton Pump Inhibitor Use: A Review of the Evidence on Safety | CADTH.ca Find the information you need Clopidogrel and Proton Pump Inhibitor Use: A Review of the Evidence on Safety Clopidogrel and Proton Pump Inhibitor Use: A Review of the Evidence on Safety Published on: March 14, 2017 Project Number: RC0874-000 - RD0036-000 Product Line: Research Type: Drug Report Type: Summary with Critical (...) Appraisal Result type: Report Question What are the harms of proton pump inhibitors used concomitantly with clopidogrel for patients requiring antiplatelet therapy following percutaneous coronary intervention? Key Message Although the findings across the studies were mixed, overall, the evidence favours clopidogrel antiplatelet therapy without PPIs. The evidence suggests that there are still some serious safety risks associated with the use of proton pump inhibitors (PPIs) with clopidogrel antiplatelet
Ticagrelor versus Clopidogrel in Symptomatic Peripheral Artery Disease. Peripheral artery disease is considered to be a manifestation of systemic atherosclerosis with associated adverse cardiovascular and limb events. Data from previous trials have suggested that patients receiving clopidogrel monotherapy had a lower risk of cardiovascular events than those receiving aspirin. We wanted to compare clopidogrel with ticagrelor, a potent antiplatelet agent, in patients with peripheral artery (...) disease.In this double-blind, event-driven trial, we randomly assigned 13,885 patients with symptomatic peripheral artery disease to receive monotherapy with ticagrelor (90 mg twice daily) or clopidogrel (75 mg once daily). Patients were eligible if they had an ankle-brachial index (ABI) of 0.80 or less or had undergone previous revascularization of the lower limbs. The primary efficacy end point was a composite of adjudicated cardiovascular death, myocardial infarction, or ischemic stroke. The primary
Recurrent Ischemic Lesions After Acute Atherothrombotic Stroke: Clopidogrel Plus Aspirin Versus Aspirin Alone In patients with acute ischemic stroke caused by large artery atherosclerosis, clopidogrel plus aspirin versus aspirin alone might be more effective to prevent recurrent cerebral ischemia. However, there is no clear evidence.In this multicenter, double-blind, placebo-controlled trial, we randomized 358 patients with acute ischemic stroke of presumed large artery atherosclerosis origin (...) within 48 hours of onset to clopidogrel (75 mg/d without loading dose) plus aspirin (300-mg loading followed by 100 mg/d) or to aspirin alone (300-mg loading followed by 100 mg/d) for 30 days. The primary outcome was new symptomatic or asymptomatic ischemic lesion on magnetic resonance imaging within 30 days. Secondary outcomes were 30-day functional disability, clinical stroke recurrence, and composite of major vascular events. Safety outcome was any bleeding.Of 358 patients enrolled, 334 (167
Association Between CYP2C19 Loss-of-Function Allele Status and Efficacy of Clopidogrel for Risk Reduction Among Patients With Minor Stroke or Transient Ischemic Attack. Data are limited regarding the association between CYP2C19 genetic variants and clinical outcomes of patients with minor stroke or transient ischemic attack treated with clopidogrel.To estimate the association between CYP2C19 genetic variants and clinical outcomes of clopidogrel-treated patients with minor stroke or transient (...) ischemic attack.Three CYP2C19 major alleles (*2, *3, *17) were genotyped among 2933 Chinese patients from 73 sites who were enrolled in the Clopidogrel in High-Risk Patients with Acute Nondisabling Cerebrovascular Events (CHANCE) randomized trial conducted from January 2, 2010, to March 20, 2012.Patients with acute minor ischemic stroke or transient ischemic attack in the trial were randomized to treatment with clopidogrel combined with aspirin or to aspirin alone.The primary efficacy outcome was new
Ascertainment, classification, and impact of neoplasm detection during prolonged treatment with dual antiplatelet therapy with prasugrel vs. clopidogrel following acute coronary syndrome Studies have suggested increased cancer incidence associated with long-term dual antiplatelet therapy (DAPT) for acute coronary syndrome (ACS). We evaluated cancer incidence and treatment-related differences in an analysis of DAPT for ACS.The Targeted Platelet Inhibition to Clarify the Optimal Strategy (...) to Medically Manage Acute Coronary Syndromes trial enrolled 9326 participants with ACS, who received aspirin plus clopidogrel or prasugrel. Median treatment exposure was 15 months. Cancer history and screening procedures were collected. Suspected non-benign neoplasm events were reported and adjudicated. The primary outcome was detection of new, non-benign neoplasm. Factors associated with neoplasm events, the relationship of these events to cardiovascular and bleeding endpoints, and treatment-related
Influence of Cyp2c19*2 Gene Variant on Therapeutic Response During Clopidogrel Treatment in Patients with Carotid Artery Stenosis Despite the proven clinical effect of oral antiplatelet drugs, a considerable number of patients do not have an adequate response to clopidogrel. The aim of our study was to determine the influence of CYP2C19*2 loss-of-function variant allele on clopidogrel responsiveness in patients with carotid artery stenosis.One hundred and twelve patients with carotid artery (...) stenosis undergoing endarterectomy were included in this one-year prospective study. All of them received clopidogrel (75 mg daily) for at least 30 days after the intervention. They were followed from the moment of hospital admission. CYP2C19*2 genotyping was performed by TaqMan Assay. The influence of CYP2C19*2 variant allele on clopidogrel platelet reactivity was determined using multiple-electrode aggregometry (MEA).Genotyping results showed that 82 (73.2%) patients were homozygous for wild type, 29
Effect of Clopidogrel and Aspirin vs Aspirin Alone on Migraine Headaches After Transcatheter Atrial Septal Defect Closure: The CANOA Randomized Clinical Trial. The occurrence of new-onset migraine attacks is a complication of transcatheter atrial septal defect (ASD) closure. It has been suggested that clopidogrel may reduce migraine attacks after ASD closure.To assess the efficacy of clopidogrel, used in addition to taking aspirin, for the prevention of migraine attacks following ASD (...) closure.Randomized, double-blind clinical trial performed in 6 university hospitals in Canada. Participants were 171 patients with an indication for ASD closure and no history of migraine.Patients were randomized (1:1) to receive dual antiplatelet therapy (aspirin + clopidogrel [the clopidogrel group], n = 84) vs single antiplatelet therapy (aspirin + placebo [the placebo group], n = 87) for 3 months following transcatheter ASD closure. The first patient was enrolled in December 2008, and the last follow-up
Effect of clopidogrel with aspirin on functional outcome in TIA or minor stroke: CHANCE substudy We compared the effect of clopidogrel plus aspirin vs aspirin alone on functional outcome and quality of life in the Clopidogrel in High-risk Patients with Acute Non-disabling Cerebrovascular Events (CHANCE) trial of aspirin-clopidogrel vs aspirin alone after acute minor stroke or TIA.Participants were assessed at 90 days for functional outcome using the modified Rankin Scale (mRS) and quality (...) of life using the EuroQol-5 Dimension (EQ-5D). Poor functional outcome was defined as mRS score of 2-6 at 90 days and poor quality of life as EQ-5D index score of 0.5 or less.Poor functional outcome occurred in 254 patients (9.9%) in the clopidogrel-aspirin group, as compared with 299 (11.6%) in the aspirin group (p = 0.046). Poor quality of life occurred in 142 (5.5%) in the clopidogrel-aspirin group and in 175 (6.8%) in the aspirin group (p = 0.06). Disabling stroke at 90 days occurred in 166 (6.5
Clopidogrel With Aspirin in Acute Minor Stroke or Transient Ischemic Attack (CHANCE) Trial: One-Year Outcomes The Clopidogrel in High-risk patients with Acute Non-disabling Cerebrovascular Events (CHANCE) trial showed that the combined treatment of clopidogrel and aspirin decreases the 90-day risk of stroke without increasing hemorrhage in comparison with aspirin alone, but provided insufficient data to establish whether the benefit persisted over a longer period of time beyond the trial (...) termination. We report the 1-year follow-up outcomes of this trial.The trial was a randomized, double-blind, placebo-controlled trial conducted at 114 centers in China. We randomly assigned 5170 patients within 24 hours after onset of minor stroke or high-risk transient ischemic attack to clopidogrel-aspirin therapy (loading dose of 300 mg of clopidogrel on day 1, followed by 75 mg of clopidogrel per day for 90 days, plus 75 mg of aspirin per day for the first 21 days) or to the aspirin-alone group (75 mg
Safety profile of prasugrel and clopidogrel in patients with acute coronary syndromes in Switzerland To assess safety up to 1 year of follow-up associated with prasugrel and clopidogrel use in a prospective cohort of patients with acute coronary syndromes (ACS).Between 2009 and 2012, 2286 patients invasively managed for ACS were enrolled in the multicentre Swiss ACS Bleeding Cohort, among whom 2148 patients received either prasugrel or clopidogrel according to current guidelines. Patients (...) with ST-elevation myocardial infarction (STEMI) preferentially received prasugrel, while those with non-STEMI, a history of stroke or transient ischaemic attack, age ≥75 years, or weight <60 kg received clopidogrel or reduced dose of prasugrel to comply with the prasugrel label.After adjustment using propensity scores, the primary end point of clinically relevant bleeding events (defined as the composite of Bleeding Academic Research Consortium, BARC, type 3, 4 or 5 bleeding) at 1 year, occurred
Long term use of clopidogrel for patients with stents or acute coronary syndrome: a review of clinical and cost-effectiveness and guidelines Long term use of clopidogrel for patients with stents or acute coronary syndrome: a review of clinical and cost-effectiveness and guidelines Long term use of clopidogrel for patients with stents or acute coronary syndrome: a review of clinical and cost-effectiveness and guidelines CADTH Record Status This is a bibliographic record of a published health (...) technology assessment from a member of INAHTA. No evaluation of the quality of this assessment has been made for the HTA database. Citation CADTH. Long term use of clopidogrel for patients with stents or acute coronary syndrome: a review of clinical and cost-effectiveness and guidelines. Ottawa: Canadian Agency for Drugs and Technologies in Health (CADTH). Rapid Response - Summary with Critical Appraisal. 2013 Authors' conclusions There appears to be uncertainty regarding the effectiveness of use