The albendazole and ivermectin combination worked the best for me. I did 3 15 day rounds of albendazole the last round I added ivermectin and it killed the big one. In between the 2nd and last half of the third round i took alinia and that killed the majority of my pin worms. I didnt take a break after the alina and went right to the albendazole/ ivermectin combo. Thats what really kicked their butts.