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Warfarin side effects: Watch for interactions

What can increase the risk of bleeding?

Some studies suggest that the risk of bleeding is generally higher in the first three months of warfarin treatment. Older adults are generally at greater risk of bleeding. Taking other blood-thinning medication also increases your risk.

Some people who take warfarin are at a higher risk of bleeding because their genetics make them more sensitive to the medication. Your doctor may recommend a genetic test to determine the best dose for you.

Medical conditions that increase the risk of bleeding include:

  • Uncontrolled blood pressure
  • A history of stroke
  • Stomach ulcers, gastritis or peptic disease
  • Kidney problems
  • Cancer
  • Alcoholism
  • Liver disease
  • Increased risk of falls