Are there any non surgical treatments lactulose overdose?

None: Lactulose is a sugar which is not absorbed (stays in the gut). If you take too much, you will have the side effects of increased diarrhea, gas and bloating. Rarely, lactulose can cause severe bloating (usually in hospitalized patients). In severe cases, it can lead to bowel distension, decreased oxygen supply to the bowel wall, and sometimes even perforation. Then surgery may be needed.