Yes, EQ was designed for humans but has since been regulated as a horse steroid -- hence the name.
The problem with a lot of people is they regard "side effects" as something that is immediate. For example, Tren causes sweats, insomnia, coughs, and anxiety. You can feel it quickly. (It's also why I would never do Tren). EQ, like any drug, has long tern consequence.
I've used this example before, but it's like X-rays or a CAT scan. They don't hurt so people think it's no different than taking a picture. But they do damage to cells and the more damage cells get, the more susceptible they are to disease.
EQ increases blood volume and red blood cell count and that can lead to something called polycythemia. That's great for horses, not so much for humans.
EQ can cause GI tract problems.
EQ is more kidney toxic than other injectables.
Of course it's all dose related. But it's important not to listen to idiots who recomend 1000 mgs a week, on top of other steroids. That's just reckless and such "advice" must be ignored.