I have taken the 5 day double dose but not with fenben. I have used mebendazole instead, as sharkman suggested. it worked well. I also have a disseminated roundworm infection. I have thpught about Ascaris but from their dead and half digested remnants it seems more like toxocara. It has really knocked them down. I took several others, like piperazine, DEC, ivermectin, alb in low dose, alinia, papaya seed, papain and reese's pinworm med previously. Alb does almost nothing on its own. The 5 day double dose was a hit but i tolerated the 10mg/kg/day twice a day well. The effects start some time after. I also have some kind of threadworms and they have gotten less too. I will repeat again. you need a mix of meds to knock them down. In the meantime detox on the max, minerals, vits, Liver Flush to keep the body in balance, you have to avoid a toxic overload.
I finally feel like there is light at the end of the tunnel and i feel almost like in my younger years. Thanks to this great protocol.