A 16-year-old girl with acne has been prescribed tretinoin (Retin-A cream). Which of the following instructions should the nurse give this girl related to prevention of a common side effect of this medication?
a) If taking an oral contraceptive, switch to a different type of contraception while taking this medication
b) Be certain of the expiration date on the drug
c) Avoid prolonged sun exposure
d) Take the medication on an empty stomach
Answer: Avoid prolonged sun exposure