Suggest you study ICU's protocol carefully. They contain the info on how long to take meds. I see that you have been using a zapper. That's great if it works for you but ICU's protocol says to stop zapping and herbals while on meds. Concentrate on getting control over your problem and worry about maintenance later which will depend on what parasite you had. If Strongyloides, maintenance is for life but you can research other options for late maintenance later. Die off symptoms are related to parasite load. The more you have and kill, the more intense the die off could be.