T.T.
My daughter has chronic constipation. The pedi has ruled out diet. She just has a mental block on pooping (would hold it for a week at a time...not good!) She will be 3 in October.
We start her day with 4oz of Plum Smart juice with a teaspoon of laxative, Miralax, which is now over the counter. Her situation is different, but Miralax is a safe and effective laxative. When we first started using it, it took 4 days to "kick in" and we were giving her a tablespoon for the first month. But now she has (almost) daily bowel movements (sometimes every 2-3 days) bt they are easy for her to pass with just one teaspoon daily.
We tried mineral oil, we tried modifying her diet, we've tried suppositories. So far, this is the only thing that has worked for us.