What is a common sign of adverse reaction to warfarin?

A common sign of an adverse reaction to warfarin is signs of bleeding. Warfarin is an anticoagulant medication that works by inhibiting the vitamin K-dependent clotting factors in the liver, which helps prevent blood clots. However, due to its blood-thinning properties, it increases the risk of bleeding events.

Patients on warfarin may exhibit various signs of bleeding, including easy bruising, unusual bleeding from cuts, bloody or dark stools, hematuria (blood in urine), or excessive bleeding from the gums. Monitoring for these signs is critical, as they indicate that the blood is too thin, which can lead to serious complications such as hemorrhagic events.

The other options do not typically correlate with adverse reactions to warfarin. Elevated blood pressure is not a direct effect of warfarin but may occur due to other underlying conditions. Increased energy levels and dry mouth are also not related to warfarin use and are not recognized as signs of adverse reactions associated with this medication. Therefore, recognizing signs of bleeding is crucial for patients on warfarin to ensure timely intervention and management.