When teaching a client about carbidopa-levodopa, which instruction is important to include?

Including the instruction that urine and saliva might turn reddish-brown is important because it addresses a common side effect of carbidopa-levodopa. This discoloration is due to the presence of phenol compounds, which can occur as the body metabolizes the medication. Patients need to be aware of this potential change to prevent any unnecessary anxiety or concern regarding their urine or saliva color. This knowledge empowers them to understand that the effect is benign and a normal part of the medication's action.

Understanding this effect also helps in distinguishing between expected side effects and those that may indicate an adverse reaction requiring medical attention. This aspect of patient education is crucial in maintaining compliance and managing expectations regarding treatment with carbidopa-levodopa.