You shouldn't use it--it specifically warns on the label about excess sun sensitivity. Cease using it the day before sun exposure and use a 50 or 70 SPF sun screen but only stay in the sun 20 min the first day to make sure you are not having a reaction. Check around your chin for rash-like symptoms or redness. Any acne scars you have will be darkened by the sun, so it really will disappoint you if you think they will even out, they will just get darker.

Remember to wash off the sun screen promptly when you go indoors to prevent clogging and then moisturize. Resume Tretinoin when you head home from Florida.