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Lactaid and Stomach Pain: What Users Say

Stomach pain: mentioned by 3 users (8.1%)

Based on user experiences from 37 Lactaid reviews, the following table shows the most commonly mentioned side effects.

All user comments are moderated by Drugs.com. Each review is verified for relevance and screened for inappropriate content. Side effects are user-reported and not clinically verified.

diarrhea 27.0%
vomiting 27.0%
nausea 16.2%
upset stomach 10.8%
chills 8.1%
stomach pain 8.1%

Reviews for Lactaid

Commonly mentioned side effects
  • Hos...
  • Taken for less than 1 month
  • December 30, 2021

For Lactose Intolerance "Worst experience of my life. When I turned 30, I started becoming lactose intolerant. When I was 37, I thought I would try Lactaid to see if I could eat dairy again without issue. I had severe stomach pain and vomiting. It was that screaming type of vomiting. The pain was so bad I thought my gallbladder burst. I didn’t think it was the pills and thought something was wrong with me. Things settled down the next day, so after a week of no issues, I figured it was a stomach bug, so I popped a Lactaid and had two slices of pizza. It was worse than the first time. The pain became so intense I was rushed to the hospital. I was gripping the bedrail from how severe the pain was. They had to give me pain medication through an IV to get it to stop. I saw a doctor and had multiple tests done to check my gallbladder. Nothing seemed wrong. Then I thought to look up Lactaid. I was amazed how many people had severe reactions to this stuff. Stay away from it."

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  • Mom...
  • July 7, 2021

For Lactose Intolerance "My oldest daughter has experienced issues when having ice cream or dairy for a while. The problem is, she is her mother’s child; we like Dairy Queen, and we can’t say no to a Blizzard. I gave her these pills about a month ago, and before we could even get in the door, she was running to the bathroom. I remember thinking that her issues were worse with the pills than usual, but my husband talked me out of that thought process. Fast forward to last night, and I decided to give her the full dose because that could have been the issue last time; I only gave half a dose because I was just starting to use it. Full dose equals FULL misery. My poor baby, once again, could barely get in the door before having to run to the bathroom. Thank goodness I had Zofran, but she’s miserable. It’s been 24 hours, and her stomach is still hurting, and she’s still in bed. This stuff is AWFUL!! From now on, I think we will just go back to Tums and Famotidine 30 minutes before ice cream."

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10 Report
  • RNa...
  • Taken for 6 months to 1 year
  • March 9, 2022

For Lactose Intolerance "I am mildly lactose intolerant and have used Lactaid brand milk for several months without issue. Suddenly, one day after ingesting this product, I became violently ill with extreme stomach pain and vomiting. This occurred almost immediately and lasted for nearly 10 hours. I was fairly certain that I was experiencing a reaction to the Lactaid product for a number of reasons. I think most people experiencing this level of pain would have rushed to the emergency room. Don't ingest things your body can't process, regardless of what they tell you."

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Reviews may be edited to correct grammar/spelling or remove inappropriate content. Reviews appearing to come from parties with a vested interest are not published. This information is not intended to endorse any medication and should not replace the expertise and judgment of healthcare professionals.