[SOCRATES -Acute Stroke Or Transient IsChaemic Attack TReated With Aspirin or Ticagrelor and Patient OutcomES]

This study is currently recruiting participants. (see Contacts and Locations)
Verified March 2015 by AstraZeneca
Information provided by (Responsible Party):
ClinicalTrials.gov Identifier:
First received: November 18, 2013
Last updated: March 10, 2015
Last verified: March 2015

The primary objective of the study is to compare the effect of 90-day treatment with ticagrelor (180 mg [two 90 mg tablets] loading dose on Day 1 followed by 90 mg twice daily maintenance dose for the remainder of the study) vs acetylsalicylic acid (ASA)-aspirin (300 mg [three 100 mg tablets] loading dose on Day 1 followed by 100 mg once daily maintenance dose for the remainder of the study) for the prevention of major vascular events (composite of stroke, myocardial infarction [MI], and death) in patients with acute ischaemic stroke or transient ischaemic attack (TIA).

Condition Intervention Phase
Acute Ischaemic Stroke
Transient Ischaemic Attack.
Drug: ticagrelor
Drug: Acetylsalicylic acid (ASA)
Phase 3

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Parallel Assignment
Masking: Double Blind (Subject, Investigator)
Primary Purpose: Prevention
Official Title: A Randomised, Double-Blind, Multinational Study to Prevent Major Vascular Events With Ticagrelor Compared to Aspirin (ASA) in Patients With Acute Ischaemic Stroke or TIA.

Resource links provided by NLM:

Further study details as provided by AstraZeneca:

Primary Outcome Measures:
  • Composite of stroke, MI and death. [ Time Frame: From randomization up to 90 days ] [ Designated as safety issue: No ]

Secondary Outcome Measures:
  • Prevention of subsequent ischaemic stroke. [ Time Frame: From randomization up to 90 days ] [ Designated as safety issue: No ]
    Comparison of the effects of treatment with ticagrelor vs ASA.

  • Net clinical outcome. [ Time Frame: From randomization up to 90 days ] [ Designated as safety issue: No ]
    stroke + MI + death + life threatening bleeding

  • Time to discontinuation of study medication due to any bleeding event. [ Time Frame: From randomization up to 90 days ] [ Designated as safety issue: Yes ]
  • Composite of ischaemic stroke, MI and CV death. [ Time Frame: From randomization up to 90 days ] [ Designated as safety issue: No ]

Estimated Enrollment: 13600
Study Start Date: January 2014
Estimated Study Completion Date: January 2016
Estimated Primary Completion Date: January 2016 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: ticagrelor Drug: ticagrelor
ticagrelor, 180 mg (two tablets of 90 mg) loading dose on Day 1 followed by 90 mg twice daily or corresponding placebo given orally.
Active Comparator: Acetylsalicylic acid (ASA) Drug: Acetylsalicylic acid (ASA)
ASA, 300 mg (three tablets of 100 mg) on Day 1, followed by 100 mg once daily or corresponding placebo given orally.


Ages Eligible for Study:   40 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Men or women equal or elder 40 years of age
  • Either acute ischaemic stroke or high-risk TIA as defined here and randomisation occurring within 24 hours after onset of symptoms

Key Exclusion Criteria:

  • Planned use of antithrombotic therapy in addition to study medication including antiplatelets (eg, open label ASA, GPIIb/IIIa inhibitors, clopidogrel, ticlopidine, prasugrel, dipyridamole, ozagrel, cilostazol) and anticoagulants (eg, warfarin, oral thrombin and factor Xa inhibitors, bivalirudin, hirudin, argatroban, unfractionated and low molecular weight heparins). - Any history of atrial fibrillation, ventricular aneurysm or suspicion of cardioembolic pathology for TIA or stroke. - Planned carotid, cerebrovascular, or coronary revascularisation that requires halting study medication within 7 days of randomisation. - Receipt of any intravenous or intra-arterial thrombolysis or mechanical thrombectomy within 24 hours prior to randomisation - History of previous symptomatic non-traumatic intracerebral bleed at any time (asymptomatic microbleeds do not qualify), gastrointestinal (GI) bleed within the past 6 months, or major surgery within 30 days.
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT01994720

Contact: AstraZeneca Clinical Study Information Center, MD 1-877-240-9479 information.center@astrazeneca.com
Contact: Peter Held peter.held@astrazeneca.com

  Show 644 Study Locations
Sponsors and Collaborators
  More Information

No publications provided

Responsible Party: AstraZeneca
ClinicalTrials.gov Identifier: NCT01994720     History of Changes
Other Study ID Numbers: D5134C00001, 2012-003895-38
Study First Received: November 18, 2013
Last Updated: March 10, 2015
Health Authority: United States: Institutional Review Board
United States: Food and Drug Administration

Keywords provided by AstraZeneca:
Acute ischaemic stroke.
Transient ischaemic attack.

Additional relevant MeSH terms:
Ischemic Attack, Transient
Brain Ischemia
Brain Diseases
Cardiovascular Diseases
Central Nervous System Diseases
Cerebrovascular Disorders
Nervous System Diseases
Pathologic Processes
Vascular Diseases
Analgesics, Non-Narcotic
Anti-Inflammatory Agents
Anti-Inflammatory Agents, Non-Steroidal
Antirheumatic Agents
Cardiovascular Agents
Central Nervous System Agents
Cyclooxygenase Inhibitors
Enzyme Inhibitors
Fibrin Modulating Agents
Fibrinolytic Agents
Hematologic Agents
Molecular Mechanisms of Pharmacological Action
Neurotransmitter Agents
Peripheral Nervous System Agents
Pharmacologic Actions
Physiological Effects of Drugs

ClinicalTrials.gov processed this record on March 26, 2015