I have a strong no-no to do any kind of enemas/colonics. I will just not do them. they gross me out.
I have tried Oxy-powder type stuff and other herbal bowel cleanses ( MH's LBB) but did not find any permanent releif.
If my understanding is correct, even the colon is jammed ( becomes toxic) because nerves going to intestines are pinched. Why not take pressure off these nerves, before trying any laxatives...
Personally Yoga has helped me with constipation, when so many other things which I tried in the past years, proved futile.