Hi. I found this message board on Monday (it is now Friday) when I first started Carac treatment. The messages about DPD Enzyme Deficiency, vision loss, death, etc. are FREAKING ME OUT! Does anyone know how soon into the treatment symptoms of DPD deficiency would start to show up? I have now done four applications. Would flu like symptoms have started by now if I have the deficiency? Do the symptoms occur within a certain amount of hours of applying the Carac? THANKS for any comments or information.