A nurse is caring for a client who has poison ivy and is prescribed diphenhydramine. Which of the following instructions should the nurse give regarding the adverse effect of dry mouth associated with diphenhydramine?

A. Dry mouth is a common and non-serious side effect of diphenhydramine; discontinuation is not necessary. B. While a humidifier may help with nasal dryness, it is less effective for relieving dry mouth. C. Taking the medication with food may help prevent gastrointestinal upset but does not address dry mouth. D. Chewing sugarless gum or sucking on hard, sour candies stimulates salivary glands and helps relieve anticholinergic side effects like dry mouth caused by diphenhydramine.