The last time I had severe constipation I did Salt Water Flushes in the AM followed by a herbal laxative and a dose of castor oil. It took 2 days of this to break up the blockage and then I did the Salt Water Flushes for another 10 days or so.
You could also do the ES doses the same as the Clark's Liver-Flush but no OG potion. ES will not work very well for small intestine blockages as the ES attracts water to the large intestine. Salt water, herbal laxatives, castor oil are the only supplements I've found for small intestine constipation. I have also foud that strong peppermint tea, high doses of Vit C and massage of the abdomen help clear out blockages.
Taking herbal laxatives for a few days will usually not result in a dependency.