I've used it for 2 years on both my dos and my cats without any problems. They've had no skin irritation at all either. They send you papers on how to dispense the medication. It is soo much cheaper and works just the same! I shower it to my Vet AND HE SAID IT WAS THE SAME THING AND WOULD SAVE ME A BUNDLE. i lOVE IT AND highly REOCOMMEND IT!!