I like Kroeger Wormwood Combination for a parasite cleanse. I use two bottles for a one month cleanse. It is only around $6 a bottle on the net. Some like Humaworm, only available directly at Humaworm.com for $30 for a one month cleanse. Humaworm has some laxatives in it, which is why I haven't used it. If one has large parasites or is very constipated, I guess the laxatives in it could be helpful. The wormwood combination has no laxatives(although wormwood and black walnut hull have very weak laxative properties). There is also Paragone which is very popular.