Well, I'm new to the message board and new to Carac. I've had 2 Mohs surgeries, one quite invasive on the side of my nose that has left a nasty, lumpy scar from major reconstruction, and another on my neck. Everything I've had has been basal cell, thank goodness not squamous or melanoma, so things could be worse. I've used Solaraze without much success but never Efudex or Carac. My dad has been through two rounds of Efudex, so I know the drill. But what I've been reading about Carac's side effects has me concerned. Maybe I'm just worrying myself into a headache after only one day of using it. How soon did everyone start experiencing the headaches, nausea and dizziness, if they did have those symptoms? I've also been through one Levulan/Blu U, which helped my face but that's all they treated...guess it's not good for chest/back/arms. I'm starting just with the Carac on my chest/neck/arms, then doing my face this fall when I can take time off work. I'm more depressed than anything, since I figure I'll have to do this for years to come since I'm only 52. Guess that's what I get for being a Swedish kid that swam year-round for the first 16 years of my life without sunscreen. I'm glad I found this board - I don't feel so alone.