Anticoagulation instability with life-threatening complication after dietary modification.

Area of Science:

• Internal Medicine
• Pharmacology
• Nutrition Science

Background:

• Long-term oral anticoagulants (e.g., warfarin) require stable vitamin K intake.
• Dietary modifications can significantly alter vitamin K levels.
• Maintaining therapeutic anticoagulation is critical for preventing thromboembolic events.

Observation:

• Two patients on long-term oral anticoagulants experienced anticoagulation instability after dietary changes.
• One patient presented with extensive bruising, managed with fresh frozen plasma.
• Another patient developed a thrombosed aortic prosthesis, necessitating emergency surgery.

Findings:

• Altered vitamin K intake due to dietary changes directly impacted anticoagulation control.
• Significant bleeding and thrombotic complications occurred in these patients.
• These cases highlight the sensitivity of oral anticoagulant therapy to dietary vitamin K fluctuations.

Implications:

• Patients on long-term oral anticoagulants must exercise extreme caution with dietary modifications, particularly those involving vitamin K-rich foods.
• Healthcare providers should counsel patients on the potential impact of diet on anticoagulation.
• Proactive dietary management and monitoring are essential to prevent adverse events in patients receiving oral anticoagulants.