MDIS, so sorry about your dad. I had liver cancer and was successfully treated at Mayo. Have been cancer free for nearly 2 1/2 years now. However, I still have hep C and cirrhosis.
Thanks, Rick, for jumping in with an answer from one who takes Lactulose. I suspected that was the case...that the body doesn't really get used to it. If it did, it wouldn't be working correctly.
MDIS, just try to encourage him to take it. And feel free to post at any time. We're glad you found us.