You also mention constiptation... the recommendation is to complete rigorous bowel cleansing before you attempt parasties cleansing so that the elimination route is fairly clear for those dead bodies to exit. If you feel you are clogged up, its really worth doing a Bowel Cleanse or a series of them asap. I did about 12 colonic irrigations (best thing I ever did) and moved literal mountains of old faecal matter out of me. I have also used Oxypowder with very good results.