Are the exposure to direct sunlight warnings serious for prescriptions?

The medication can sensitize your skin, causing you to get a sunburn much easier. While this reaction certainly doesn't happen in everyone, it would be best to use sunscreen while on it, especially if you plan on being outside volunteering at a camp all day. Its a pretty easy precaution that really should be used even if you weren't on the medication, just try and find a high SPF sunscreen and reapply it several times durring the day