The best replacement for lactulose is miralax.

The best alternatives to lactulose are rated as following:
★★★★★  miralax
★★★  sorbitol
★★  lactose
★★  milk of magnesia
★★  rifaximin
★  laxatone
★  kristalose
★  colace
★  amitiza
★  lactitol
★  kayexalate
★  polyethylene glycol
★  senna
★  peg
  enulose
  movicol
  polyethylene glycol 3350
  xifaxan
  miralax better
  macrogol

Your alternative for lactulose is not listed? Suggest!
Speaking about lactulose, one probably shouldn't forget about movicol.

Other search terms related to lactulose and their ratings are:
★★★★★ movicol
★★★ senna
★ senokot
You have in mind a companion for lactulose and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of lactulose in all years. Click on graph for more.
lactulose
miralax
sorbitol