Equine Colic Relief USA has been in business since 2008 selling this wonderful product that is actually saving horses from the terrible death of colic. I personally procrastinated about buying Equine Colic Relief when I first found out about it. I had not had a case of colic that I could not walk my horse out of in years. THEN my most favorite horse got a bad case of colic and was DEAD in 4 1/2 hours and the local vet could do nothing for her. I know I had caught the bout within 30 minutes of it starting and really feel that if I had a bottle of Equine Colic Relief I could have saved her life. Since then I have personally used it on two of my other horses and numerous of my neighboring area horses. Saving all of their precious horses. Do not be caught without the FIRST DEFENSE for colic and have a tragic ending. It does not interfere with anything the vet would administer. But after you see this product work, you will not want to be without it.