Because it a bit unclear where to find information about this on this forum. I decided to start a new topic about it and move an existing topic underneath it. So that I can later add more general info to this first top post.
Soolantra (designed for humans with Rosacea) basically contains ivermectin (the active ingredient) and a moisturizer from Cetaphil as its base.
A problem with Soolantra is that it can be very expensive. (Price can differ widely per country.) Also, Soolantra isn’t available in every country, and you need a prescription for it.
Oral forms of ivermectin (available in pill form) designed for humans, already existed long before Soolantra. It is probably cheaper than Soolantra, but oral forms are probably less effective and probably shouldn’t be taken continously. So it’s probably not recommended to use an oral form of ivermectin. Also it is difficult to apply a pill form directly on your face as a topical.
But there are also ivermectin forms available for horses/animals. These are available in liquid and in paste form. The liquid form is designed to be injected via the skin of animals (with a needle). (Don’t inject it into your own skin!) And the paste form is designed to be used orally for animals. (Don’t take this orally yourself!)
Even though these forms are designed for animals, it is possible to apply it to your face topically. It’s probably recommended to use Soolantra because it’s designed for humans and therefor safer and correcter to use, but the animal version may be a lot cheaper and easily availble without prescription.