Vice versa. I disagree: the dosages are well documented. From memory, it's 222mg of fenben each day (with oil or fat) and 12mg of Iver per day. That's a safe minimum. Some people go a lot higher, short term. Dosages are for an average weight adult. Take both drugs because they attack cancer in different ways and you might not have time to experiment with one at a time. Side effects are usually minimal, although you might suffer a Herxheimer effect if you have parasites. That can make you feel ill.