A nurse is caring for a client who is taking warfarin and reports taking several new herbal supplements. The nurse should identify that which of the following supplements is contraindicated for concurrent use with warfarin?

Answer: B. Dispose of the remaining medication while another nurse observes.

Rationale:

A) Return the remaining medication to the facility's pharmacy: Return the remaining medication to the facility's pharmacy: This is not typical practice for partial doses of controlled substances like hydromorphone. The pharmacy usually does not accept leftover portions of such medications.

B) Dispose of the remaining medication while another nurse observes: This is the correct and appropriate action. When administering controlled substances, any unused portion must be properly disposed of to prevent misuse or diversion. Having another nurse observe and document the disposal ensures accountability and adherence to safety protocols.

C) Store the remaining half of the pill in the automated medication dispensing system: Storing a partial tablet of a controlled substance is not appropriate. The automated medication dispensing system is designed to store and dispense whole doses of medication as prescribed. Storing partial tablets can lead to confusion, contamination, and potential misuse. It also increases the risk of medication errors, as the partial dose may not be easily identifiable or accurately accounted for.

D) Place the remaining half of the pill in the unit-dose package: his practice is not acceptable for controlled substances due to the risk of misuse, contamination, and the potential for medication errors. Controlled substances require strict handling and disposal procedures to ensure safety and compliance with regulatory standards. Placing a partial tablet back into the unit-dose package does not align with these standards and could lead to inappropriate use or administration.

B) Melena: Melena refers to black, tarry stools and is indicative of upper gastrointestinal bleeding. Warfarin is an anticoagulant medication that works by inhibiting the synthesis of vitamin K-dependent clotting factors, thereby prolonging the time it takes for blood to clot. While anticoagulation is intended to prevent thrombosis, it also increases the risk of bleeding, including gastrointestinal bleeding. Melena is a concerning sign of significant bleeding and requires prompt medical attention. The nurse should prioritize reporting melena to the provider to facilitate further evaluation and management, which may include adjusting the warfarin dosage or investigating the underlying cause of the bleeding.

A) Hair loss: Hair loss, or alopecia, is a known side effect of warfarin but is generally not considered a priority finding compared to signs of active bleeding. While hair loss can be distressing for clients, it is typically not life-threatening and may resolve spontaneously or with discontinuation of the medication.

C) Abdominal cramping: Abdominal cramping can occur for various reasons, including gastrointestinal upset or other gastrointestinal issues, but it is not typically associated with warfarin use. While the nurse should assess and address the client's abdominal cramping, it is not as urgent as reporting signs of active bleeding such as melena.

D) Fever: Fever may indicate the presence of an infection or inflammatory process but is not directly related to warfarin therapy. However, if the fever is accompanied by signs of bleeding or other concerning symptoms, it should be reported to the provider for further evaluation. Nonetheless, in the absence of other significant symptoms, fever alone may not be as urgent as reporting melena, which suggests active bleeding.