Last Updated on April 27, 2026 by Beth Skwarecki
Taking too much Mylanta can increase side effects and make digestive symptoms worse. I would expect diarrhea, cramping, nausea, or stomach discomfort first, but larger amounts can cause more serious problems.
Your risk is higher if you take more than directed or use it everyday or too often.
Common Signs You Took Too Much
Taking too much Mylanta may cause
- diarrhea
- nausea
- stomach cramps
- bloating
- vomiting
- weakness
These symptoms are more likely when magnesium affects your bowels too strongly.
More Serious Concerns
Larger amounts may raise the risk of dehydration, mineral imbalance, and problems in people with kidney disease.
I would be more cautious if symptoms feel severe or unusual.
What To Do
Stop taking more Mylanta and drink fluids if diarrhea starts.
You should get medical advice if symptoms are strong, repeated, or severe.
You can also review Does Mylanta Make You Poop to understand why higher doses often worsen bowel effects.
Bottom Line
Too much Mylanta can worsen digestive side effects and may lead to stronger symptoms. Mild symptoms may improve after stopping it. Severe symptoms should be checked.
Beth is Cloudmineinc’s senior health editor and a certified personal trainer. She has over 10 years experience as a science journalist and is the author of two books. She deadlifts over 315 lbs.