What client statement indicates that dantrolene is effective for a patient with multiple sclerosis?

The statement indicating that dantrolene is effective for a patient with multiple sclerosis is the one expressing a reduction in muscle spasms. Dantrolene is a muscle relaxant primarily used to manage spasticity by acting on the skeletal muscles to decrease the frequency and severity of muscle spasms.

In the context of multiple sclerosis, where muscle spasticity is a common symptom due to the disease's effects on the central nervous system, reporting a decrease in the frequency of muscle spasms signifies that the medication is having its intended therapeutic effect. This symptom reduction can lead to improved mobility and overall quality of life for the patient.

The other statements, while they may reflect improvements in other areas of health or well-being, do not specifically pertain to the primary action of dantrolene as a muscle relaxant. Therefore, the statement about the frequency of muscle spasms most clearly aligns with the expected outcomes of treatment with dantrolene in this patient population.