What is an expected side effect of terbinafine that clients should monitor?

Terbinafine is an antifungal medication commonly used to treat fungal infections. One of the expected side effects of terbinafine that clients should be particularly mindful of is vision changes. This side effect may occur due to the drug's effects on the retina and can lead to alterations in visual acuity or color perception. It's important for clients to report any sudden changes in vision to their healthcare provider, as monitoring in this regard is essential for ensuring overall safety and health while using this medication.

While there are other possible side effects of terbinafine, such as gastrointestinal disturbances, the specific concern regarding vision elevates the need for clients to stay vigilant in this area. The other options do not directly correlate with typical reactions associated with terbinafine, making monitoring for vision changes particularly crucial.