Efficacy and Safety of Low-molecular Weight Heparin for Thromboprophylaxis in Acutely Ill Medical Patients

Inclusion Criteria: * Hospitalization due to an acute non-surgical disease * Significant decrease in mobility Exclusion Criteria: * Indication for anticoagulant or thrombolytic therapy * Major surgical or invasive procedure within the 4 weeks that precede randomization * Expected major surgical or invasive procedure (including spinal/peridural/epidural anesthesia or lumbar puncture) within the 2 weeks that follow the randomization * Immobilization due to cast or fracture of lower extremity * Immobilization lasting longer than 3 days in the period prior to randomization * Heparin administration longer than 36 hours in the period prior to randomization * Acute ischemic stroke Other protocol-defined inclusion/exclusion criteria may apply