sclc -Anyone done a 2nd course of chemo?

sclc -small cell lung cancer, Just wondering if anyone knows someone who has done a 2nd course of chemo (drugs; carboplatin & etoposide) for this? Wondering how it will go, what to expect & if there is a cummulative effect on the body.
Husband did 4 cycles May to Aug 2013, 6 months free of chemo, starting another 4 cycles this Feb 2014.