Never used it myself... just looking at the bottle it reads like a cure-all, mostly contains herb oils. I've never had a bird with any of the listed problems it claims to treat, so wouldn't have had a reason to test it out. Definitely wouldn't treat coccidiosis though.
Thanks, you two!VetRX will not do anything for coccidiosis. I have used it quite a lot for helping chickens with facial and respiratory inflammation due to stuff being up the nose that shouldn’t be. It’s very, very good for helping chickens expel stuff that’s gotten pushed up past the nares and for stopping sneezing fits due to getting into particulate irritants, but beyond that it won’t do much.