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Evaluation of Antiplatelet Effects of Different Dosages of Aspirin in Type 2 Diabetic Patients (DM-ASA 001)

This study has been completed.
ClinicalTrials.gov Identifier:
First Posted: December 19, 2008
Last Update Posted: August 2, 2010
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
Information provided by:
Karolinska Institutet
The efficacy of low dose aspirin appears to be substantially lower in diabetic patients, compared to patients without diabetes. The aim of the investigators study is to test the laboratory response to different dosing of aspirin in type 2 Diabetes Mellitus. The investigators will compare the regular dose of 75mg once daily to 75 mg twice daily or to 320 mg once daily. The hypothesis of the study is that twice daily dosing of aspirin may improve the response to aspirin.

Condition Intervention Phase
Type 2 Diabetes Mellitus Drug: Aspirin Drug: aspirin Phase 4

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: None (Open Label)
Primary Purpose: Basic Science
Official Title: Evaluation of Antiplatelet Effects of Different Dosages of Aspirin in Type 2 Diabetic Patients

Resource links provided by NLM:

Further study details as provided by Karolinska Institutet:

Primary Outcome Measures:
  • An exploratory study with three co-primary response variables which are directly related to platelet COX-1 inhibition: arachidonic acid-induced platelet aggregation in whole blood and PRP and in the Cone-and-Plate(let) Assay (CPA) [ Time Frame: 12 or 24 hours after last dose of Aspirin ]

Secondary Outcome Measures:
  • Indirectly COX-related platelet aggregation induced by collagen or ADP, and thromboxane metabolite excretion. [ Time Frame: 12 or 24 hours after last dose of aspirin ]

Enrollment: 25
Study Start Date: January 2008
Study Completion Date: April 2010
Primary Completion Date: April 2010 (Final data collection date for primary outcome measure)
Intervention Details:
    Drug: Aspirin
    75 mg per day versus 75 mg twice daily and 320mg once daily
    Other Name: Trombyl
    Drug: aspirin
    crossover study with three dosages: 75 mg once daily, 75 mg twice daily, 320 mg once daily.
    Other Name: Trombyl

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Ages Eligible for Study:   50 Years to 75 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Type 2 DM with micro- or macroangiopathy.
  • HbA1c 6-9 % (Mono-S method).
  • Need for, or already on-going aspirin treatment.
  • Age 50-75 years
  • Antecubital forearm veins allowing technically good sampling for platelet studies

Exclusion Criteria:

  • Diet controlled DM.
  • Acute ischemic stroke, acute coronary syndrome, (myocardial infarction or unstable angina pectoris), or revascularization by PCI or by-pass surgery within the last 6 months.
  • Acute or chronic kidney disease (P-cystatin C within the reference interval)
  • Acute or chronic liver disease (ALAT ≤2 times the upper reference value).
  • A history of gastric or duodenal ulcer disease.
  • Need for treatment with anticoagulants, clopidogrel, NSAID's, or thiazolidinediones.
  • Thrombocytopenia (platelet count <150 x 109/L)
  • Anticipated need for alteration of concomitant drug therapy during the course of the study.
  • Enrollment in another clinical study.
  • Contraindication(s) to aspirin treatment.
  Contacts and Locations
Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00812032

Department of Medicine, Clinical pharmacology Unit, Karolinska University Hospital, Solna.
Stockholm, Sweden
Sponsors and Collaborators
Karolinska Institutet
Principal Investigator: Paul Hjemdahl, MD, PhD Karolinska Institutet
  More Information

Responsible Party: Prof. Paul Hjemdahl, Dept Medicine Solna, Clinical Pharmacology Unit, Karolinska Institute, Stockholm, Sweden
ClinicalTrials.gov Identifier: NCT00812032     History of Changes
Other Study ID Numbers: EudraCT No: 2007-003186-40
First Submitted: December 18, 2008
First Posted: December 19, 2008
Last Update Posted: August 2, 2010
Last Verified: December 2009

Keywords provided by Karolinska Institutet:
platelet inhibition
Aspirin treatment

Additional relevant MeSH terms:
Diabetes Mellitus
Diabetes Mellitus, Type 2
Glucose Metabolism Disorders
Metabolic Diseases
Endocrine System Diseases
Anti-Inflammatory Agents, Non-Steroidal
Analgesics, Non-Narcotic
Sensory System Agents
Peripheral Nervous System Agents
Physiological Effects of Drugs
Anti-Inflammatory Agents
Antirheumatic Agents
Fibrinolytic Agents
Fibrin Modulating Agents
Molecular Mechanisms of Pharmacological Action
Platelet Aggregation Inhibitors
Cyclooxygenase Inhibitors
Enzyme Inhibitors