This thread seems to have morphed from 'how to take tablets' into 'controlling constipation'.
I had problems using all the standard medications, anything could happen, no effect leading to bypass diarrhoea, delayed effect leading to 'explosion', occasionally the desired result.
There was absolutely no consistency in what could happen.
A chance remark at a carers' meeting provided the solution - regular stews containing Knorr Stock Pots with plenty of onions!!.
This, combined with the day centre recording all BMs on the Bristol scale, solved the problem.