Hello and welcome to MedHelp's forums and we appreciate your question. However, we ARE sorry you have to ask it. We hope your friend is doing well. We apologize for a delay in responding. Has your friend since met with her doctor? I would question if you should see any changes after just one round of chemotherapy. And at what point a second approach should be taken. I think managing expectations is important for the doctor to discuss with your friend. When do they expect a significant change? Generally, small cell lung cancer does respond fairly quickly to chemo. But every patient is different.
Here is some information on treatment for small cell lung cancer. https://www.cancer.net/cancer-types/lung-cancer-small-cell/types-treatment.
Please give us an update on your friend!