“I will have my blood tested once a week to check my medication level.” Warfarin is an anticoagulant that prevents blood clots from forming or growing larger.

It works by inhibiting the synthesis of vitamin K-dependent clotting factors in the liver.

The effect of warfarin varies from person to person and can be influenced by many factors, such as diet, other medications, and health conditions.

Therefore, it is important to monitor the blood level of warfarin regularly using a test called the international normalized ratio (INR), which measures how long it takes for the blood to clot.

The INR should be within a certain range, usually between 2 and 3, to prevent bleeding or clotting complications.

The client should have their INR checked at least once a week and adjust their warfarin dose accordingly.

Choice A is wrong because using a soft-bristled toothbrush is not enough to prevent bleeding gums.

Warfarin can increase the risk of bleeding from any injury or trauma, such as brushing the teeth, shaving, or cutting the skin.

The client should avoid activities that can cause bleeding and report any signs of bleeding, such as bruising, nosebleeds, blood in the urine or stool, or heavy menstrual bleeding.

Choice B is wrong because eating more green leafy vegetables can interfere with the effect of warfarin.

Green leafy vegetables are rich in vitamin K, which is needed for the production of clotting factors.

Eating more vitamin K can reduce the effectiveness of warfarin and increase the risk of clotting.

The client should maintain a consistent intake of vitamin K and avoid sudden changes in their diet.

Choice C is wrong because taking ibuprofen can increase the risk of bleeding.

Ibuprofen is a nonsteroidal anti-inflammatory drug (NSAID) that can inhibit platelet function and cause stomach ulcers.

Both of these effects can worsen the bleeding tendency of warfarin.

The client should avoid NSAIDs and use other pain relievers, such as acetaminophen, if needed.