Have you tried other drugs and/or combos? Ivermectin is very broad spectrum (as is albendazole). Any idea what kind they are (tapeworms, roundworms?). Are you doing anything to help your body eliminate them such as juicing, eating a good amount of fiber, enemas? Damaging your liver in the process of trying to get rid of parasites isn't going to do you any good. If you haven't passed any visible worms using these meds in 3 weeks and you're going to the bathroom several times a day, these clearly aren't the right meds for you. There are tons of other options. Pyrantel pamoate is a very safe drug and may be worth a shot too.