you aren't giving that to your guinea pigs are you? The doeses are way to large for guinea pigs. You shouldn't be using products for other animals anyway.
Are you kidding? That is a picture of IVERMECTIN, a standard, safe, widely used anti-parasitic. I suggest you read this page: https://www.guinealynx.info/ivermectin.html
Many horse ivermectin dewormers come with flavored ivermectin. Just because both animals are vegetarians, dosen't mean they can both have the same ingrediants used to flavor the dewormer.
The ingredients are written on the package so if there is something in it beside ivermectin it will say so, You can use ivermectin on your pigs if you know what your doing. Of course the entire tube is far too much thats why you have to dose it correctly. Just read the website Fairysari suggested for further information.
yea, I personally wouldn't use that unless the vet has said it was okay.... I'm just focusing on the fact that that is a HORSE de-wormer, it specifically says.. oral paste- HORSE, not small animals....