A nurse is reviewing the record of a client who has been prescribed baclofen (Lioresal). Which of the following disorders, if noted in the client's history, would alert the nurse to contact the health care provider?

Baclofen is a muscle relaxant commonly used to treat muscle spasticity. However, it can lower the seizure threshold, which makes it particularly concerning for clients with a history of seizure disorders. If a client has a seizure disorder, the use of baclofen could potentially exacerbate their condition, leading to an increase in the frequency or severity of seizures.

This connection highlights the importance of careful medication management in patients with underlying conditions that could be worsened by pharmacological interventions. In this case, alerting the health care provider is crucial to ensure that the client receives appropriate monitoring and possible adjustments to their treatment plan to minimize risks associated with seizure activity.

In contrast, the other disorders listed—hyperthyroidism, diabetes mellitus, and coronary artery disease—do not present the same level of risk concerning the use of baclofen. While they may have their own considerations for treatment and management, they do not directly interfere with the medication's effects on seizure activity. Thus, the nurse's need to contact the health care provider is primarily prompted by concerns about potential seizures in clients taking baclofen.