Call Your Doctor Now (night or day) If

• You feel weak or very sick
• Chest pain lasts more than 5 minutes
• Chest pain brought on by exertion and relieved by rest
• Chest pain spreads into your shoulder, arm, or jaw
• You have angina chest pain and it has been increasing in severity or frequency
• Difficulty breathing or taking a breath makes pain worse
• Coughing up blood
• Dizziness, lightheadedness, or weakness
• Heart beating irregularly or very rapidly
• Fever
• Major surgery in the past month
• Any prior "blood clot" in leg or lungs (Note: typically would have required treatment with a blood thinner such as heparin or coumadin)
• Hip or leg fracture in past two months
• Recent illness requiring prolonged bed rest within last month
• Recent long distance travel with prolonged time in car, bus, plane, or train (i.e. several hours sitting in one spot) within last month
• Drug abuse