Is 5-FU injection safe in the eyelid to relax scar resulting from revisional Asian double eyelid and ptosis correction?

I received a revisional Asian double eyelid surgery and mild ptosis correction 1.5 years ago. Since then my eyes do not close completely which has led to dry eyes. There has been improvement in eye closure but it has been an extremely slow process. I really want to do something about this because I feel as if I have waited long enough. I have spoken to surgeons and some have suggested 5-FU, steroids, and PRP. What will relax this scarring in my eyelids? Thanks.