PhotoDynamic Therapy is a combination of Blu-U and Levulan PDT, a 2-part treatment, unique because it uses a light activated drug therapy to destroy AKs. How does it work? Levulan Kerastick Topical Solution is applied to the AK. The solution is then absorbed by the AK cells where it is converted to a chemical that makes the cells extremely sensitive to light. When the AK cells are exposed to the BLU-U Blue Light Illuminator, a reaction occurs which destroys the AK cells. We often combine lights; Intense Pulsed Light (IPL) and Blu-U which takes the treatment to the next level for photo rejuvenation. The purpose is to treat the tissue at different depths to increase efficacy. Great Treatment for age spots, AKs and also for Acne!
If you are referring to the combination of Blu-U and levulan, it is an excellent option for both sun spots and actinic keratosis. More than one treatment may be required especially if you're doing it for cosmetic improvement of the brown sun spots.