Stopped taking propecia (finasteride) 6 months ago, and lost some hair since. If I start on it again can that hair regrow? Does propecia (finasteride) regrow hair?

Maybe. Propecia (finasteride) can grow hair under certain circumstances but there are many downsides. Suffering with malignant melanoma and hodgkins lymphoma , i would not advise the taking of any unneeded toxins in the body and Propecia (finasteride) is one of those. Also the chemotherapy causes hair loss that Propecia (finasteride) can not reverse.