Lactaid Fast Act and Diarrhea: What Users Say

• Mom...
• Taken for less than 1 month
• January 31, 2020

For Lactose Intolerance "My story sounds like all the others. I tried this product 2 separate times. The first time I was at work. Took the Lactaid with my lunch and one hour I was sick. Vomiting and diarrhea. I had to leave and go home. I did not think it was the pills. I tried it again a few months later and same thing. Vomiting and diarrhea. I had bought a box of 60 chewables that will go to trash. I would not recommend this product to anyone."

• Acc...
• Taken for less than 1 month
• May 11, 2020

For Lactose Intolerance "I have taken this pill 3 separate times. Every time I have taken this, I have severe cramps and diarrhea. Horrible diarrhea! The first two times I took this, I thought it was something I ate that was bad. Now, the third time dealing with this, I know that it’s the pills. When my stomach wakes me up in the middle of the night so I can spend an hour in the bathroom, it is not fun. It usually lasts for 24 hours, but it’s embarrassing to tell my boss I can’t come in because I’m on the toilet. Never again will I take these, and I would never recommend them."

• Hug...
• Taken for less than 1 month
• March 14, 2019

For Lactose Intolerance "I took the chewable Lactaid on three occasions. The first time, I had to miss work for the remainder of the day as I was vomiting nonstop. Next time, the same. The third and last time, I ended up in the ER, I was in pain, had a fever, diarrhea, and vomiting at the same time. My wife was the one who recalled that all three times I was sick, it was when I used Lactaid Fast Act chewable tablets. NEVER AGAIN. I did not believe it, so I tried eating the cheese I had that night without Lactaid, and I did not have any symptoms except the usual bloating I get from lactose. I prefer bloating to spending a night hooked to the intravenous fluids."

• Jas...
• Taken for 1 to 6 months
• April 16, 2019

For Lactose Intolerance "Suspected I was lactose intolerant, so I cut out dairy. Got nostalgic for ice cream and other dairy treats real quick. Gave Lactaid a try at the recommendation of friends and doctor. Several times felt like I was dying. I was up sweating all night with severe stomach pain, felt like my intestines were being wrung into a knot, and prayed for diarrhea, which eventually did come and didn't stop for an hour. This happened to me several times on separate occasions until it dawned on me it could be the Lactaid pills. I never took these horrible things again, and I’ve never had the issue reoccur. I’d rather yolo a bowl of ice cream and let the lactose intolerance run its course than suffer the immense pain these lactose pills caused me."

• Jes...
• Taken for less than 1 month
• February 28, 2023

For Lactose Intolerance "This is the first time I’ve bought this brand, and the rest of the stories sound very familiar. I took 1 pill and ate 2 slices of pepperoni pizza, and I was in the toilet with cramps all day. Then tried 3 pills. Same. With 2 slices of pizza, and nope, it did not help. I felt cramps, so much bloating, and constipation, then diarrhea. What a bad experience!! I thought this would help me, but no. Do not recommend this brand. I bought it at CVS."

• Anonymous
• Taken for 1 to 6 months
• May 13, 2019

For Lactose Intolerance "I have been using Lactaid milk for a while for my morning cup of coffee and still had issues with bloating and gas, so I recently decided to use the Lactaid Fast Act. I noticed that there were days when my stomach would hurt an hour or two after the pill, but nothing too insanely bad. But today, I only drank my coffee and one of the pills, and three hours later at work, I was in a cold sweat and puking my life away. I hate leaving early, so it was super embarrassing, and when I got home, I felt the same stomach pain I usually get from the Lactaid pill, and additionally, I started having really bad diarrhea. This pill was supposed to make me more comfortable, but I almost puked all over my coworkers and pooped to within an inch of my life at home. I'm hesitant to ever take these again."

• Eco...
• Taken for less than 1 month
• September 24, 2019

For Lactose Intolerance "I've been lactose intolerant since I was a young child, but I never took anything for it. I avoided regular milk and have only used Lactaid milk or soy. A couple of weeks ago, I decided to try Lactaid Fast Acting pills because I was tired of the gas and upset stomach. This medicine has caused me severe stomach pains and diarrhea. I am currently curled up in a ball in pain. I would rather have terrible gas than take this pill again."

• Lii...
• Taken for less than 1 month
• September 4, 2015

For Lactose Intolerance "I have taken Lactaid Fast Act twice now (one week apart). Both times, within hours, I had diarrhea and vomiting. Won't be using this product again."