Correct Answer: A

Rationale: St. John's wort can reduce the effectiveness of Warfarin by interacting with its metabolism pathways, potentially leading to decreased anticoagulant effects. Therefore, clients on Warfarin therapy should avoid St. John's wort. While echinacea, garlic, and ginseng are also herbal supplements that can interact with Warfarin, St. John's wort is particularly known for its significant impact on Warfarin metabolism.

Correct Answer: C

Rationale: Dyspnea is a concerning finding in a client receiving Mannitol as it can be a manifestation of heart failure, an adverse effect of the medication. The nurse should report this to the provider promptly to ensure appropriate evaluation and management.

Correct Answer: B

Rationale: In a situation where a client presents with Benzodiazepine toxicity, the priority action for the nurse is to assess the client. By identifying the client's level of orientation, the nurse can gather crucial information about the client's mental status, which is essential for determining the appropriate care and interventions needed. Administering flumazenil, infusing IV fluids, or preparing for gastric lavage may be necessary interventions but should follow a thorough assessment of the client's condition.

Correct Answer: C

Rationale: The correct answer is C: Gynecomastia. Bicalutamide, due to its antiandrogenic properties, can lead to gynecomastia in clients. This condition involves the development of breast tissue in males and is an important adverse effect to monitor when taking this medication.

Correct Answer: B

Rationale: Offering oral hygiene every 2 hours is essential for a client receiving opioid analgesics to prevent dry mouth, nausea, and vomiting, which are common adverse effects associated with opioid use. This intervention promotes comfort and enhances the client's well-being during labor.