I'am sorry to hear about your dad, my husband
Has sclc also, he is doing well but has not had it as long as your dad, there is a clincal trial
For sorafenib may stop the growth of small cell lung cancer by blocking blood flow to the tumor and by blocking some of the enzymes needed for cell growth. It is a pill you take twice a day.
It has been approved by fda for kidney cancer, i am not sure how sclc has responded but .cancer.gov/clinicaltrials identifier nct00182689 is being tested all over the country. If my husbands comes back this is what i hope he can try, rather than go back thru chemo i think because it is being tested in so many cancer centers that there must be high hopes for this drug.
Take care
Lea ann