A female client with mild depression reports to the nurse recently starting St. John's wort. Which information provided by the client requires further instruction?

A. Insomnia may occur while taking the medication: St. John's wort can increase central nervous system stimulation, leading to side effects like insomnia, restlessness, and anxiety. Educating the client that sleep disturbances may occur is appropriate and consistent with known herb effects. B. Another form of contraception is not needed: St. John's wort can induce cytochrome P450 enzymes, leading to faster metabolism and reduced effectiveness of hormonal contraceptives like birth control pills. Clients must be advised to use an additional non-hormonal contraceptive method to prevent unintended pregnancy. C. Hard candy can be used for a dry mouth: Dry mouth is a recognized side effect of St. John's wort. Sucking on hard candy, increasing oral hydration, or chewing sugarless gum are appropriate and effective ways to manage this discomfort. D. Sensitivity to the sun can develop: Photosensitivity is a well-documented adverse effect of St. John's wort. Clients should be instructed to use sunscreen, wear protective clothing, and limit sun exposure to prevent sunburns or skin reactions.