Absolutely, I much prefer teas to pills for that very reason. :)
Cumulative as in over weeks/months. :) Some people don't think and take senna teas for months and months! then they have a real job trying to reestablish good bowel function.
Glad to hear your friend did great with Colonix, so long as fiber is there then the tea can't force the colon to clench so much, and it all works out better. One of my pet peeves is when an intestinal cleansing system just has laxatives and no fiber.