Lactaid and Diarrhea: What Users Say

• Thi...
• Taken for 1 to 6 months
• January 5, 2021

For Lactose Intolerance "This worked once or twice. Four days ago, I became ill after taking these pills, not knowing what my problem was. I was vomiting, had diarrhea, and was shaking. I had other symptoms but I ended up going for a COVID test because I was so ill. Only 4 days passed, and I took the pills again tonight. Here I am, typing this from the bathroom floor, extremely nauseous, and just had diarrhea. DO NOT BUY THESE. It is not worth the bathroom time and how rubbish they make you feel."

• Som...
• Taken for less than 1 month
• September 27, 2019

For Lactose Intolerance "I have tried these pills twice. Once last week, and I got violently ill, vomiting for 5 hours straight, and then diarrhea about 4 hours later. The vomiting was so bad that I couldn’t hardly breathe in between. I got cold chills and was sweating profusely. It was absolutely awful. I tried again last night, not knowing what exactly caused the illness the first time. Same exact thing. No way will I ever take another one of these or suggest them to anyone."

• Sco...
• February 6, 2017

For Lactose Intolerance "After not having many issues with any dairy other than ice cream, I decided to try Lactaid in order to be able to enjoy the delicious treat of vanilla ice cream once more...but I regret everything now. Not only did it not do Jack squat, but my symptoms of lactose intolerance are even worse now. Usually, I can get away with just a little bit of gas, and I'm fine, but now I have nausea, diarrhea, gas, and bloating. Worst decision ever!!! This product deserves negative stars!!!"

• Stu...
• Taken for less than 1 month
• June 23, 2014

For Lactose Intolerance "My 10-year-old son would get stomach cramps and diarrhea every time he tried milk. We tried Lactaid on two different occasions a few weeks apart, and both times it caused vomiting. Obviously, something in the pills does not agree with him."

• Aha...
• Taken for 1 to 6 months
• November 11, 2018

For Lactose Intolerance "I developed a lactose intolerance around the time I turned 25. I cut out all dairy products until a few months ago, I’m now 32, until a friend gave me Lactaid. If I’m eating a cheeseburger and I take one fast-acting capsule, I’m fine. If I’m eating ice cream, potato soup, chicken Alfredo... I have taken two. I have taken two now three separate times, and both times ended up with severe, painful vomiting/diarrhea. Much worse than if I had just eaten the food without the Lactaid. I think it’s a great product if it works for you, but I would rather not eat dairy than projectile vomit."

• Mz ...
• Taken for less than 1 month
• December 27, 2017

For Lactose Intolerance "This is my second time trying this pill. The first was about ten years ago. Therefore, I brushed the side effects to the side and thought it was just me. This time, I took two pills, and all I can say is that I will never try them again! Maybe it’s just me, but I vomited, had diarrhea, and my stomach hurt for hours. I prayed to the porcelain queen like no other. All I wanted was a mini bar of ice cream, but after feeling so bad, I’d rather deal with the side effects from having the ice cream."

• N61...
• Taken for less than 1 month
• June 12, 2023

For Lactose Intolerance "This made me so much sicker than the discomfort I experience from eating dairy. Twice now I've ended up with overwhelming nausea, vomiting, and diarrhea. I only figured it out because both of these happened after using Lactaid. There's no warning on the box at all, but trust me, it's horrible. It takes about 3 days to feel better."

• So ...
• Taken for less than 1 month
• November 12, 2021

For Lactose Intolerance "This is the second time I used Lactaid. OMG, did I get sick! Within one hour of taking it, I was having diarrhea. Then came severe vomiting! Had no time to lift up my toilet seat! What a freakin' mess! I was so thirsty, but each time I drank water, back to hugging the toilet I went! Had chills and a low-grade fever. I have no idea why this reacted the way it did, but I will never take it again! PS. I finally discovered why I had gotten sick over my sister's house a month ago. Thought I had a 24-hour bug. But finding out today, it was the Lactaid she gave me!"

• Emi...
• October 6, 2021

For Lactose Intolerance "The first time I took this, I experienced extreme stomach ache, believing that my body was just not used to it. A few hours later, I experienced diarrhea. I was very confused, but I used it again the next few days, and the second time, it did the same thing. The only difference was I experienced horrible vomiting, my throat was burning so bad I was in horrible pain. After doing some research about it, many people have experienced the same thing. DON’T BUY THEM, NOT WORTH IT."

• Not...
• Taken for less than 1 month
• May 19, 2024

For Lactose Intolerance "Took 2 chewable lactose tablets approximately 4 minutes prior to having sausage gravy with milk. Before I took my first bite of food, my abdomen was bloated with gas (we're talking 45-60 seconds of flatulence). This is worse than just having milk. Nausea accompanied, within another 8-10 minutes, and diarrhea within 30 minutes. I'd taken it before and it worked about half the time. One thing to note: I am on a carnivore diet for the past 4 years, so my gut biome is drastically different than what it used to be. Without taking Lactaid and staying away from milk products, I do not have gas ever. Nor do I get diarrhea. I am strict on this diet. I had no biscuits with this meal, only eggs and sausage gravy made with milk, but the symptoms started before my first bite of food and only after taking the medication. So there's an anecdotal correlation and only a possible causation. More studies should be done."