Brought a box of lactaid ultra last week. I took a few pills Thursday and Friday, I was o.k. Starting on Sunday, my stomach started hurting so bad, I had to be rushed to the ER. They did X-Rays & Cat Scans, nothing found except my liver enzymes were a little high. II am about to go get some Kaopectate and never use the ultra lactaid tablets again. My stomach is still in pain every morning.