In Own Your Own Body by Stan D. Malstrom, N.D., M.T. (currently out-of-print, if you find a copy in a used book store, grab it!) describes laxatives as mild purgatives. He describes purgatives as "herbs that cause copious evacuations from the bowels and are generally combined with other agents that control or modify the action For use only by adults," he adds.
Well, we've never tried them and from the description above, we probably won't, at least not without being under the care of a licensed medical practitioner who could give us several good reasons for taking one.