Correct Answer: A

Rationale: When St. John's wort, an herbal supplement, is taken with citalopram, a selective serotonin reuptake inhibitor (SSRI), there is a risk of serotonin syndrome. Serotonin syndrome is a serious condition that can occur when there is an excess of serotonin in the body, leading to symptoms such as confusion, hallucinations, rapid heart rate, increased body temperature, and more. Monitoring for serotonin syndrome is crucial when these substances are taken together to prevent any potential harm to the client.

Correct Answer: B

Rationale: Thrombophlebitis, which is inflammation of a vein with the formation of a clot, is a contraindication to the use of oral contraceptives due to an increased risk of thromboembolism. Clients with a history of thrombophlebitis or thromboembolic disorders should avoid oral contraceptives to prevent further complications like deep vein thrombosis or pulmonary embolism.

Correct Answer: D

Rationale: In clients with rheumatoid arthritis, an elevated erythrocyte sedimentation rate (ESR) is a common finding and indicates inflammation in the body. A high ESR value suggests active disease activity and potential joint damage. Therefore, the healthcare professional should report an ESR of 75 mm/hr to the provider for further evaluation and management of the client's rheumatoid arthritis.

Correct Answer: A

Rationale: When St. John's wort, an herbal supplement, is taken with citalopram, a selective serotonin reuptake inhibitor (SSRI), there is a risk of serotonin syndrome. Serotonin syndrome is a serious condition that can occur when there is an excess of serotonin in the body, leading to symptoms such as confusion, hallucinations, rapid heart rate, increased body temperature, and more. Monitoring for serotonin syndrome is crucial when these substances are taken together to prevent any potential harm to the client.

Correct Answer: C

Rationale: Contact precautions are used for clients with known or suspected infections that are spread by direct or indirect contact. The most important measure for healthcare workers when caring for a client on contact precautions is to wear gloves when providing care. This helps prevent the transmission of infectious agents between the client and the healthcare worker. Removing the protective gown after leaving the client's room, placing the client in a room with negative pressure, and wearing a mask when in the client's room are not specific to contact precautions and may not be necessary for all clients on contact precautions.