Well I can only speak for myself .Ive tried quite a few of them except for prazi and niclosamide and the pyrantel was harder on my stomach then any of them .It also gives me an instant headache .Actually now that I think about it .It upset 4 out of 6 of our stomachs that took it .Both me and my grandson get an instant headache as well .Now as far as how it is for your liver and organs .I really don't know .
Good luck keep us posted on it .
Im using the iver and pyrantel right now and so far so good .Im actually making some headway the last couple of days .Im doing the pulse method (7 days on ,then 2 off 2 days on ) with the iver and daily with the pyrantel .I would be really careful if you are thinking of doing the 12 mg four times per day of iver .That seems really excessive to me .