How do you use these herbs to get rid of parasites from your body?

If you think you might have caught some parasites then what you need to do is speak to a real doctor, not an herbalist. They will do a stool test to confirm if you actually have a parasite and then they will give you appropriate medication to kill the parasite. Despite the prevalence of quacks who say otherwise, colon cleansing is neither a required or wise course of action to combat parasites. There is evidence of this everywhere. I could post more, but just check out Gary Y's sources, they are sufficient to convince any reasonable person to never do a colon cleanse.