I don't know what all the variables are/were in your body and what adjunct therapies you may (or likely may not) have been using to cleanse & restore your colon, but one of THE GREATEST natural healers that ever lived ( Dr. Schulze ) used Senna as one of the herbs in his IF#1.
Over the last two-three decades TENS OF THOUSANDS of people have used IF#1...and when used as part of a full cleansing and healing protocol (not just as an "herbal bandaid"), they become "regular", NOT more constipated.
Restoring the colon/intestines in someone already experiencing constipation can sometime take years. Please read through the links in this thread to learn more: //www.curezone.org/forums/am.asp?i=1641922
Should Senna (or any other cathartic herb, otc, or pharmaceutical laxative), ever be used irresponsibly (as in, not part of a full healing & cleansing protocl)? Of course not - forcing action in the intestines without addressing the cause of the inaction is not only stupid, it's capable of causing harm.