It's very expensive in US Like $1000 a pill. They typically can only prescribe 3 pills two weeks apart and for some reason they are convinced this will kill them all. It won't. You will need enough to do at least 3 -15 day rounds. You can order it off the internet for about $1.00 a pill or you can use animal meds. also once you know how you react to it you may want to add another med to your treatment protocol because one does not usually clear all stages of parasites.