Is PDT also used for cosmetic/wrinkles?

Studies have shown increased collagen production from PDT, and therefore we commonly use the pulsed dye laser, IPL and blue and red light together when performing PDT to maximize this effect, which correlates with wrinkle improvement.

Photodynamic
Therapy “PDT” will give cosmetic benefits. In my office I like to use it for
acne and sun damage treatment, the cosmetic benefits are an added bonus to
treating the other conditions. If you are only interested in cosmetic/wrinkle
improvement then there are many other options that may be more appropriate.
Consult with a Board Certified Dermatologist to see which treatments would be
best for your concerns.

Yes PDT (photodynamic therapy) can be used for cosmetic enhancement.  This is especially true if the Blu-light treatment is augmented with other laser devices.  In practice I usually apply the Levulan kerastick to the affected areas and then when it is time to activate, I use a combination of an IPL device, an Alexandrite laser and a pulsed dye laser to address uneven skin tone, unwanted pigmentation, and blood vessels.  This combination will address multiple concerns and give an overall better cosmetic result at the end.